2021 Chevrolet Silverado 1500
Safety record from NHTSA: recalls, owner complaints, investigations and service bulletins.
Vehicles › Chevrolet › Silverado 1500 › 2021
Safety record from NHTSA: recalls, owner complaints, investigations and service bulletins.
These records cover every 2021 Chevrolet Silverado 1500. To see whether one car still needs a recall repair, decode its VIN or check it with NHTSA.
8 recalls name the 2021 Chevrolet Silverado 1500. Newest first.
General Motors, LLC is recalling certain 2020 Chevrolet Silverado 2500, 3500, GMC Sierra 2500, 3500, and 2020-2022 Chevrolet Silverado 1500 and GMC Sierra 1500 vehicles that may have been repaired incorrectly under recall 24V797. The transmission control valve may fail and cause the rear wheels to lock up.
Rear wheel lock up increases the risk of a crash.
Dealers will inspect the vehicles and update the transmission control software, free of charge. Owner notification letters were mailed March 6, 2026. Owners may contact GMC customer service at 1-800-462-8782 or Chevrolet customer service at 1-800-222-1020. GM's number for this recall is N252516560. Vehicle Identification Numbers (VINs) involved in this recall became searchable on NHTSA.gov on February 12, 2026.
General Motors LLC (GM) is recalling certain 2021-2024 Cadillac Escalade and Escalade ESV, Chevrolet Silverado 1500, Suburban, and Tahoe, GMC Sierra 1500, Yukon, and Yukon XL vehicles equipped with a 6.2L V8 gas engine. The connecting rod and/or crankshaft engine components may have manufacturing defects that can lead to engine damage and engine failure.
Engine failure increases the risk of a crash.
Dealers will inspect the engine, and as necessary, repair or replace the engine. For vehicles that pass inspection, dealers will add higher viscosity oil, install 6 oil fill cap, replace the oil filter, and update the owner's manual. Repairs will be performed free of charge. Owner notification letters were mailed June 18, 2025. Owners may contact Cadillac customer service at 1-800-333-4223, Chevrolet customer service at 1-800-222-1020, or GMC customer service at 1-800-462-8782. GM's number for this recall is N252494000.
General Motors, LLC (GM) is recalling certain 2020-2022 Chevrolet Silverado 1500, 2500, 3500, GMC Sierra 1500, 2500, 3500, 2021 Cadillac Escalade, Escalade ESV, Chevrolet Tahoe, Suburban, GMC Yukon, and Yukon XL vehicles equipped with diesel engines. The transmission control valve may fail and cause the rear wheels to lock-up.
Rear wheel lock-up can increase the risk of a crash.
Dealers will install new transmission control module software, free of charge. GM will provide a special coverage program to cover the repair of transmissions that are identified by the remedy software as containing a defective control valve. Owner notification letters were mailed December 12, 2024. Owners may contact GM customer service at 1-888-988-7267, Cadillac customer service at 1-800-458-8006, GMC customer service at GMC 1-800-462-8782 or Chevrolet customer service at 1-800-222-1020. GM's number for this recall is N242454440.
General Motors (GM) is recalling certain 2019-2021 GMC Sierra 1500 and Silverado 1500 vehicles equipped with certain accessory road tires and a 17" spare tire. The 17" spare tire provided with the vehicle is not compatible for use with the accessory wheels, which can cause the anti-lock brake system (ABS) to not function properly under certain conditions.
An ABS system that does not function properly can increase the risk of a crash.
Dealers will provide a new 17" spare tire and wheel assembly that is compatible with the accessory wheels, free of charge. Dealers will also apply a new spare tire information label, and provide owners with an owner's manual insert clarifying which spare tire to use with the accessory road tires and with the 17" original tires. Owner notification letters were mailed February 7, 2022. Owners may contact GM customer service at 1-800-462-8782 or GMC customer service at 1-800-462-8782. GM's number for this recall is N212346510.
General Motors, LLC. (GM) is recalling certain 2021 Chevrolet Silverado 1500 vehicles. The front driver's side air bag module may be missing one or more metal tabs that secure the plastic air bag cover to the housing.
The missing tabs may prevent the air bag from deploying properly, increasing the risk of injury in a crash.
Dealers will inspect the driver frontal air bag, and replace it if necessary, free of charge. Owner notification letters are expected to be mailed August 16, 2021. Owners may contact Chevrolet customer service at 1-800-222-1020. GM's number for this recall is N212336560.
General Motors, LLC (GM) is recalling certain 2020 Chevrolet Bolt EV and 2021 GMC Canyon and Sierra 1500, 2500 and 3500, Yukon, Yukon XL, Cadillac Escalade and Escalade ESV and Chevrolet Blazer, Camaro, Colorado, Equinox, Silverado 1500, 2500 and 3500, Suburban and Tahoe vehicles. Incorrect bolts may have been used at one or more fastening locations to…
If a seat belt assembly is not properly attached to the vehicle, the seat belt may not properly restrain an occupant in the event of a crash, increasing the risk of injury.
GM will notify owners, and dealers will replace the suspect bolts, free of charge. The recall began January 29, 2021. Owners may contact GMC customer service at 1-800-462-8785, Cadillac customer service at 1-800-458-8006, or Chevrolet customer service at 1-800-222-1020. GM's number for this recall is N202322230.
General Motors, LLC (GM) is recalling certain 2019-2021 Chevrolet Silverado 1500 and GMC Sierra 1500, 2021 Chevrolet Suburban and Tahoe and GMC Yukon XL and 2020-2021 Chevrolet Silverado 2500 and 3500 and GMC Sierra 2500 and 3500 vehicles. The seat belt brackets may not be secured to the seat frame in the front-row center seating position.
If a seat-belt bracket is not secured, the seat belt may not properly restrain an occupant in the front-row center seat position, increasing the risk of injury in a crash.
GM will notify owners, and dealers will inspect left-side and right-side front-row center seat-belt bracket attachments and reassemble it correctly as necessary, free of charge. The recall began January 26, 2021. Owners may contact GMC customer service at 1-800-462-8782, Chevrolet customer service at 1-800-222-1020. GM's number for this recall is N202314670.
General Motors LLC (GM) is recalling certain 2020 Buick Enclave, Cadillac XT5, GMC Acadia and Chevrolet Traverse vehicles and 2020-2021 Chevrolet Silverado 1500, GMC Sierra 1500 vehicles. The vehicles may have been manufactured with Continental tires that were overcured.
Overcured tires may experience a carcass break in the sidewall resulting in a sudden air loss or could develop a belt edge separation which could lead to partial or full tread/belt loss. Either condition increases the risk of a crash.
GM will notify owners, and dealers will inspect vehicles and replace tires that have DOT number and production mold number combinations identified by Continental, free of charge. The recall began December 17, 2020. Owners may contact GMC customer service at 1-888-988-7267, Buick customer service at 1-866-608-8080, Chevrolet customer service at 1-800-222-1020 or Cadillac customer service at 1-800-458-8006. GM's number for this recall is N202319030.
The lifter on my cylinder one is failing. This is a known issue with the Chevrolet 5.3L 8cylinder engine and 2021 models are known for being notoriously bad with lifter issues. My safety and the safety of other drivers that own 2021 Chevrolet models is impacted due to this issue can cause the engine to completely fail and shut off while driving which could cause severe injuries up to death. The problem is a widespread issue and mine was confirmed by an independent service mechanic. The vehicle is now being inspected by the dealership. The issue did not arise until I reached 104,000 miles.
I bought this vehicle 9/2023. On 02/23/2024, I started my truck, and heard a very loud knocking noise upon starting it. I turned it off. Called the dealership to come pick it up. They were able to repair it, by repairing some of the lifters on one side. Fast forward to 10/25/2026, I started my truck and heard the same knocking noise. Called the dealership to come pick it up. They say my truck is no longer covered under the power train warranty, and it will cost $10,000 to replace the other side of lifters and cam shaft.
The contact owns a 2021 Chevrolet Silverado 1500. The contact stated that while driving the vehicle at highway speeds, the vehicle shut off and lost power. The vehicle failed to accelerate and coasted off the interstate to a safe stop. The contact stated that several warning lights were illuminated on the instrument panel while the vehicle was losing power. The contact stated that two days prior to the failure, the vehicle was taken to an independent mechanic for an oil change, and there was no failure found. The manufacturer was notified of the failure. The vehicle was towed to the dealer where it was diagnosed with engine failure. The contact was informed that the engine needed to be replaced. The failure mileage was 79,000.
On October 18, 2026, I was driving my 2021 Chevrolet Silverado 1500 with the 5.3L V8 engine at highway speeds with my wife and two young daughters in the vehicle when the engine suddenly lost power and the truck began shaking violently. The check engine light flashed, and "Service ESC" and "Service Parking Brake" warnings appeared on the dashboard. The sudden loss of power at highway speeds created a serious safety risk to my family and surrounding motorists. I was able to get the vehicle off the highway safely. Restarting the truck did not resolve the issue, and it was no longer drivable. The truck was towed by a AAA contractor to a Chevrolet dealership. Following inspection, the dealership verbally diagnosed a broken camshaft and advised that the entire engine required replacement. The truck had approximately 98,000 miles at the time. A written diagnosis has been requested, and the vehicle is currently at the dealership. The truck has a documented history of engine problems. In July 2023, at approximately 33,500 miles, a Chevrolet dealership diagnosed code P0300 and documented misfires on cylinders 1, 3, and 7. Warranty diagnostic and repair work was performed. Another check engine light concern was documented in November 2024 at approximately 62,300 miles. In April 2025, at approximately 69,600 miles, Chevrolet again investigated a P0300 multiple-cylinder misfire condition. Beginning around 75,000 miles, the truck also began displaying recurring low-oil warnings. I added oil whenever these warnings appeared and maintained regular oil changes, supported by service records. Despite these prior engine concerns and dealership visits, the engine suffered a catastrophic failure without an immediate warning before reaching 100,000 miles. I am concerned about the potential for sudden engine failure and loss of propulsion at highway speeds and believe this warrants a safety investigation.
My truck experienced a sudden catastrophic engine failure at highway speeds. It is directly related to the current recall on L87 gm engines and has the same symptoms but is not covered under the current recall. The crankshaft failed thus causing the timing chain to break completely destroying the engine.
I was cruising down the highway at 55mph when the engine suddenly shut off. I took it to a mechanic who said the engine suffered a catastrophic failure and would need replaced. The truck only has around 93,000 miles on it and should definitely be looked into. The vehicle has always been very well maintained.
The contact owns a 2021 Chevrolet Silverado 1500. While driving approximately 35 - 40 MPH, the check engine warning light illuminated, and the vehicle lost automotive power. The contact parked and restarted the vehicle; however, the RPM fluctuated and the failure persisted while driving. The vehicle then failed to restart and was towed to the dealer and DTC: P0016 was retrieved. The failure was associated with NHTSA Campaign Number: 25V274000 (Engine and Engine Cooling); however, the VIN was not included in the recall. The manufacturer was notified of the failure by phone. The failure mileage was approximately 85,000.
My 6.2L is experiencing engine knocking. Sounds like ball bearings rolling around at idle and acceleration. Its been seen by GM dealer and they notice "something" isnt right but say its not part of recall at this time. They want it to fail more before pursuing.
The contact owns a 2021 Chevrolet Silverado 1500. The contact stated that while driving 60 MPH, the check engine warning light illuminated. The vehicle was taken to the dealer, where it was diagnosed that the engine coolant control valve had failed and required replacement. The vehicle was not repaired. The VIN was not included in Special Coverage Program: N252508341 (Coolant Control Valve), nor was the VIN included in the associated technical service bulletin. The contact stated that the failure occurred on several occasions. The manufacturer was not notified of the failure. The failure mileage was 77,000.
last October 2025 while going a slow rate of speed my passenger front ball joint severed and this past 17 oct 2026 my driver side ball joint broke also going a slow rate of speed after turning onto a highway.
Coolant control valve Is available for inspection Safty issues include Loss of power steering and brakes while driving Sudden power limp mode Sudden engine over heating and engine seizure Loss of visibility due to smoke and Loss of defrosting Inspection done by chevolet (live oak Fl) Check engine light and code p1098 appeared after defect.
Chevrolet Silverado 1500 6.2L Truck was driving and fully lost capability to accelerate. Truck alarmed driver to shift to neutral and restart engine. Attempt to restart engine was not successful. Error code was sent via email in a diagnostic report to owner with code P0016. No check engine lights or alarms were on the dash. Truck is currently at an auto mechanic. Safety issue was leaving driver and passengers stranded. Auto mechanic states truck needs new engine. Tried to verify VIN to the GM recall notice (N252494000) and was told not included in recall, even though truck has same motor listed in recall AND giving the error code. There was no warning messages, lights or symptoms prior to this failure. Request to have this complaint investigated to be included in the recall with the information provided.
Chevy Silverado 1500 6.2L Truck lost acceleration while driving. Truck advised driver to shift to neutral and restart vehicle. When driver did, no resolve. Error code with diagnostic report was immediately emailed to owner with error code of P0016. Mechanic advises truck needs new engine as this is a common issue with this year of truck that was included in a recall. After further investigation, truck vin is NOT included in recall as other GM vehicles (same engine & year). Would like this investigated as this truck should be included with the recall.
On my way home to [XXX] from [XXX] around XXX, my 2021 Chevy Silverado with 84,xxx miles with the 6.2 L engine started to make a popping sound. I checked my dash for any error codes and there were none. The oil pressure, temp, and transmission temp gauges all read normal. I stopped and topped the gas tank off with premium gas and checked the oil level, which was good. I was able to limp the truck back to my house. The next morning when I started it, there were error codes and the engine was still making the popping noise as well as a louder knocking noise. I started researching the symptoms, called two local independent shops and concluded the DFM system that shuts cylinders off to conserve gas has failed and caused the lifters to fail. I was told the failed lifter could and probably did damage the cam shaft(s). If I kept driving it, the camshaft damage could cause complete engine failure and more safety consequences. One shop quoted $5000 to replace lifters and $8000 if the camshafts were damaged. The other shop was similar, but offered a rebuilt engine for $12,000 because the lifters, camshafts, and new GM crate engine were all back ordered with no ETA from the local Chevy dealership. After weighing my options, and needing a truck, I decided to trade in my damaged truck. I contacted the GM concierge on XXX and was told to call back when the dealership had my damaged truck and could diagnose it. On XXX I called them back and they said they wouldn’t help because I traded it in. I had no plans to trade it before the engine failed and took a substantial hit on the trade in price that GM should have helped with to cover their faulty DFM system that caused the lifters to fail, which the dealership confirmed was the problem. They said they wouldn’t know if the camshafts were damaged until they took it apart, which they decided to not do and send it to auction instead. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
While driving approximately 30–40 mph through an uphill left-hand curve, the steering suddenly became extremely stiff and very difficult to turn. I do not recall seeing any warning before I noticed the steering becoming stiff. While trying to control the vehicle, I noticed “Service Power Steering” and “Service ESC” warnings approximately 1–2 seconds later. I cannot say exactly when the warnings first appeared because everything happened very quickly and I was focused on trying to control the vehicle. The vehicle left the roadway onto an adjacent lawn and traveled along a steep hillside beside the road. The driver-side mirror struck a curve sign and broke before the vehicle returned to the roadway. The vehicle also bounced while traveling off the road, and there is additional visible body damage. I do not yet know whether there is hidden steering, suspension, underbody, or other damage. A passenger was in the vehicle and witnessed the incident. Shortly afterward, while taking the passenger home, the steering again became extremely stiff and I again noticed the Service Power Steering and Service ESC warnings. Because the steering problem occurred twice, I parked the vehicle and have not driven it since because I do not believe it is safe to operate. The vehicle has not yet been professionally diagnosed or repaired and remains available for inspection. I have opened a case with the manufacturer. There were no known steering problems before this incident. The vehicle had an alignment performed earlier the same day
2021 Chevrolet Silverado 1500 with the 6.2L V8 (RPO L87), built November 2020. Mileage at failure: 11268. On XXX the check engine light came on with DTCs P0011 and P0016. The engine developed a rattle at startup and when lifting off the throttle around 40 mph. On XXX Fowler Chevrolet ([XXX]) isolated the abnormal engine noise to the crankshaft bearings. Cutting open the oil filter showed excessive bearing material. The dealer advised engine replacement before complete engine failure and quoted $12,561.66. This is the same failure described in recall 25V-274 (GM N252494000): crankshaft/connecting rod bearing failure in the L87 engine, which can cause loss of propulsion while driving. My VIN is not included in the recall because it was built before the XXX start of the recall build window. The engine is the same L87 and failed the same way. The vehicle has been maintained with regular oil changes and I have records. GM Customer Assistance case XXX was opened XXX. The vehicle is currently not safe to drive due to risk of engine seizure and loss of motive power. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
While driving vehicle service power steering light came on had no power steering had to wrestle steering wheel no power steering a smaller person would not have able to handle it
2021 Silverado with 5.3 engine/8spd transmission/38,000 miles just outside of the 5-year powertrain warranty *No current recalls under this VIN as of 10/07/2026* Undiagnosed issues with symptoms similar to transmission or rear end slippage, torque converter or clutch pack problems. No warning lights or messages have appeared 1) Vehicle seems to hunt for proper gearing between 30-40 mph (3rd to 4th gear) with light shuddering before shifting gears. Occurred 20+ times 2) Sudden jerk when taking off from dead stop. Feels like being lightly bumped from behind then drives normally. Occurred 4 times 3) Only noticed when towing appx 6,000lb trailer descending down a hill - A one-time loud clunk when easing off throttle and coasting downhill. The sound is similar to hitting a metal desk with a fist. Occurred 7 times. Spoke with local Chevrolet dealer who informed me the powertrain warranty has recently expired, and no repair cost would be covered. Recommended dealer service would be to replace the transmission fluid and filter with Mobil 1, potentially reprogram the transmission, and replace the torque converter. All on a vehicle with only 38,000 miles
I was traveling on a 55mph road. My Chevy Silverado started to shake and lose propulsion. I pulled off on the side of the road. In idle it shook. The dealership was one mile to my south. I turned on the hazard lights and went to the dealership. I could only get the vehicle to 45mph as in shook very bad the whole way. It felt as if the engine was going to explode the whole way there. The vehicle was taken to the dealership where it has been initially diagnosed as a bad lifter.
The contact owns a 2021 Chevrolet Silverado 1500. The contact stated that while driving approximately 35 to 40 MPH, the vehicle stalled and failed to restart. The contact retrieved DTC: P228C and P030 after scanning the vehicle. The vehicle was towed to a service center, where the contact was provided DTC: P228C, P0340, and P0C6. The contact was informed that the timing chain and guide had failed and that the engine needed to be replaced. The vehicle was not repaired. The failure mileage was approximately 172,000.
The contact owns a 2021 Chevrolet Silverado 1500. The contact stated that while driving at an undisclosed speed, the vehicle was smoking. The contact stated that the engine was smoking heavily with a strong oil odor, before the vehicle shut off. The contact stated that the engine warning light was illuminated. The vehicle was restarted and driven to the dealer. The manufacturer was notified of the failure. The vehicle was taken to the dealer, and the technicians confirmed the engine failure. The contact was informed that the engine needed to be replaced. The vehicle was being repaired. The failure mileage was 78,000.
Ball joint Failure of front passenger wheel assembly Wheel literally folded under truck . Both ball joints broke . 64k miles luckily I was only doing about 20 mph .
I am submitting this complaint regarding a 2021 Chevrolet Silverado 1500 Trail Boss 4WD with the [6.2L V8 (L87)], VIN [XXX], 101,000 miles. The truck was assembled in Mexico in XXX, about six weeks before XXX, just outside the build range of GM recall 25V-274 (N252494000, Engine Failure). On 10/2/2026, [XXX], [XXX] a certified GM dealership, diagnosed crankshaft and lifter failure, matching the recall condition. Codes: P0300, P050D, P0016. The truck was shaking violently, the ESC and emergency braking system failed, reducing engine power. GM's Part 573 filing attributes the defect to out-of-specification crankshafts and identifies a Mexico-based crankshaft supplier. I ask GM to confirm my engine's build date and crankshaft source. A six-week gap in build date should not exclude a truck with the same failure. Engine failure can cause sudden loss of power while driving, a safety risk. The dealer quoted repairs of up to $10,292.00. I request: That GM cover the repair in full as a goodwill adjustment. That GM and NHTSA review expanding the recall population to trucks built near my date. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
6.2 L engine failure oil related. Had to replace engine.
The contact owns a 2021 Chevrolet Silverado 1500. The contact stated that the vehicle experienced excessive oil consumption at 2,600 miles. The vehicle was taken to the dealer, where it was diagnosed with a blown engine. The engine was replaced; however, the contact stated that the replacement engine continued to consume a significant amount of engine oil. The vehicle was taken back to the dealer, where the replacement engine was diagnosed with premature engine failure at 37,100 miles. The contact stated that during the engine failure, there was an abnormal sound coming from the engine and transmission. The manufacturer was notified of the failure. The contact stated that the vehicle had been taken to the dealer every 1,000 miles for oil to be added due to the excessive oil consumption. The dealer confirmed the initial engine failure and the premature failure with the replacement engine. The failure mileage was 37,100.
NHTSA’s Office of Defects Investigation opened these reviews into vehicles including this one.
On January 16, 2026, the Office of Defects Investigation (ODI) opened Recall Query RQ26001. This investigation was opened to assess the remedy effectiveness of Recall 25V-274. ODI has received complaints alleging engine failure in vehicles after the recall remedy had been completed, whether that remedy involved an oil viscosity change or a complete engine replacement. General Motors (GM) issued Recall 25V-274 to address concerns of engine failure in the L87 engines produced between March 1, 2021 and May 31, 2024. GM cited the root cause as a supplier manufacturing and quality issue. GM’s recall remedy for Recall 25V-274 consisted of two different repairs, either an oil viscosity change or an engine replacement, based on the results of the remedy inspection procedure. ODI continues to receive reports of engine failures after the completion of the recall remedy. To date, ODI has received 499 complaints alleging post-remedy engine failure in vehicles subject to Recall 25V-274, 473 of which involved an oil viscosity change and 26 a complete engine replacement. Additionally, ODI has received 191 reports of L87 engine failures in engines produced after the production period cited in Recall 25V-274. GM reported receiving 6,953 complaints of post-remedy engine failure. ODI is opening this Engineering Analysisto continue investigating complaints of post-remedy engine failure. ODI is expanding the scope of this Investigation to include engines produced after the production period cited in the recall. To review the ODI reports cited in the Opening Resume ODI Report Identification Number document, go to NHTSA.gov.
On January 16, 2026, the Office of Defects Investigation (ODI) opened Recall Query RQ26001. This investigation was opened to assess the remedy effectiveness of Recall 25V-274. ODI has received complaints alleging engine failure in vehicles after the recall remedy had been completed, whether that remedy involved an oil viscosity change or a complete engine replacement. General Motors (GM) issued Recall 25V-274 to address concerns of engine failure in the L87 engines produced between March 1, 2021 and May 31, 2024. GM cited the root cause as a supplier manufacturing and quality issue. GM’s recall remedy for Recall 25V-274 consisted of two different repairs, either an oil viscosity change or an engine replacement, based on the results of the remedy inspection procedure. ODI continues to receive reports of engine failures after the completion of the recall remedy. To date, ODI has received 499 complaints alleging post-remedy engine failure in vehicles subject to Recall 25V-274, 473 of which involved an oil viscosity change and 26 a complete engine replacement. GM reported receiving 6,953 complaints of post-remedy engine failure. ODI will close this RQ and continue to investigate complaints of post-remedy engine failure for Recall 25V-274 as part of an Engineering Analysis (EA26005). To review the ODI reports cited in the Opening Resume ODI Report Identification Number document, go to NHTSA.gov.
The Office of Defects Investigation (ODI) has received 1,157 reports of engine bearing failure failures in the L87 6.2L engine produced by General Motors (GM). Of the 1,157 reports received, 173 are outside of the scope of recall 25V-274. These engines are installed in Model Years (MY) 2019–2024 Chevrolet Silverado 1500 and GMC Sierra 1500, and 2021-2024MY Chevrolet Suburban and Tahoe, GMC Yukon/Yukon XL, and Cadillac Escalade/Escalade ESV vehicles. The subject engine failures were investigated as part of a Preliminary Evaluation (PE25001). GM determined that these engine failures were due to multiple supplier manufacturing and quality issues. GM issued recall 25V-274 to address the supplier manufacturing and quality issues produced between March 1, 2021, and May 31, 2024. Based on the issuance of recall 25V-274, NHTSA has closed PE25001. ODI continues to receive a significant number of reports of engine failure in vehicles outside the scope of 25V-274. This presents a potential safety risk that warrants further investigation. ODI is opening this Engineering Analysis (EA) to further evaluate the scope and severity of the potential problem and to fully assess the potential safety-related issues of vehicles built outside the recall scope. To review the ODI reports cited in the Opening Resume ODI Report Identification Number document, go to NHTSA.gov.
On January 16, 2025, the Office of Defects Investigation (ODI) opened Preliminary Evaluation PE25001 after receiving complaints and field reports concerning engine failures in MY2019-2024 GM’s full-size truck and SUV T1XX platform equipped with the L87 6.2L V8 engine. These complainants alleged engine bearing failures resulting in knocking and growling noises from the engine’s bottom end and in some cases more severe consequences such as broken connecting rods leading to engine damage, or engine failure. If the engine fails during vehicle operation, the vehicle will lose propulsion, increasing the risk of a crash. On April 24, 2025, GM issued recall 25V-274 to address the concern with L87 engines produced between March 1, 2021, and May 31, 2024. GM cited the root cause as a supplier manufacturing and quality issues. GM’s recall remedy will be either an oil change to an oil with a different viscosity or engine replacement depending on the results of the remedy inspection procedure. To date, ODI has received 1,157 allegations of engine bearing failure. GM submitted 55,464 reports in total, with 29,752 unique VINs. ODI continues to receive allegations of L87 engine failures which fall outside of the scope of recall 25V-274. Based on GM’s recall, ODI will close this PE. NHTSA will continue to investigate complaints of engine failure outside the scope of recall 25V-274 as part ofEngineering Analysis (EA25007). To review the ODI reports cited in the Closing Resume ODI Report Identification Number document, go to NHTSA.gov.
On April 9, 2021, the Office of Defects Investigations (ODI) opened PE21-010 to investigate instances of air bag malfunction indicator light (MIL) illumination and potential for frontal air bag non-deployment in several vehicles manufactured by General Motors (GM). The vehicles included model year (MY) 2020 through 2021 CT4 and CT5 passenger cars, Sierra and Silverado trucks (1500/2500/3500 models), XT4 and MY 2021 Escalade, Suburban, Tahoe, Yukon SUVs.Technical Service Bulletin (TSB) 21-NA-005, issued in March 2021, addresses air bag MIL illumination with diagnostic trouble codes (DTCs) B0001-1B or B0012-0D. It cites rust particles in the connection terminal interface of the driver air bag inflator housing as the cause of the air bag MIL illumination. Illumination of the air bag MIL under these circumstances may result in a non-deployment of the frontal driver air bag during a frontal collision and increased risk of injury to the driver.GM stated a correlation exists between production delays due to the pandemic shutdown and premature corrosion initiation on the surface of the air bag inflator housing, which, in some cases, caused rust development during a seven (7) month period of vehicle production. In the rare instance when a rust particle dislodges from the driver air bag inflator housing and enters the air bag connector prior to assembly, an intermittent resistance spike at the air bag connector may result. The condition generates excessive resistance in the air bag electrical system when the steering wheel horn cover is manipulated or the steering wheel is turned. This excessive resistance is momentary. A crash commanding air bag deployment would need to occur exactly when the momentary excessive resistance occurs. Thus, there is a very low likelihood the hazard will present a risk during a crash of sufficient severity to warrant a commanded deployment. This failure mechanism occurs early in life and results in an air bag MIL illumination that corresponds to a DTC warning the driver that the vehicle requires service. The vehicle's air bag remains functional while the MIL is illuminated, and the DTC is present.Once the connection of the driver air bag module to the clockspring is made at the plant, or at the dealership for service, there is no longer an opportunity for rust migration into the connection point. The connector is sealed and has gold terminals, eliminating the expectation of fretting corrosion. All subject vehicles passed standard corrosion validation testing for extensive corrosion with no issue of air bag non-deployment.There is a low rate of occurrence: 1.41 incidents per thousand vehicles (IPTV) for all related occurrences, and 0.04 IPTV for occurrences with a mention of visible rust and/or corrosion on the air bag inflator housing. The average occurrence mileage for the subject vehicles is approximately 2,100. Every occurrence related to the alleged defect experienced an air bag MIL illumination and there are no verified allegations of air bag non-deployment within all data sources.To date, there have been no reported fires, crashes, injuries, or fatalities related to this issue. In view of the low rate, and the nature of early-life failure, the high detectability of failures, and low potential hazard to drivers, this Preliminary Evaluation (PE) is closed. The closing of this investigation does not constitute a finding by NHTSA that a safety-related defect does not exist. The agency reserves the right to take additional action if warranted by new circumstances.Review the ODI reports cited above at nhtsa.gov under the following identification numbers: 11537927, 11528888, 11525020, 11521401, 11506057, 11493107, 11486767, 11441525, 11433146, 11425658, 11423440, 11385267, 11376429, 11373466, 11366995.
Technical service bulletins and other communications the manufacturer sent dealers about this vehicle. Ask a dealer for the full document by its number.
Bars are owner complaints, dots mark years with recalls. Select a year to open its report.