2018 GMC Sierra Denali
Safety record from NHTSA: recalls, owner complaints, investigations and service bulletins.
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Vehicles › GMC › Sierra Denali › 2018
These records cover every 2018 GMC Sierra Denali. To see whether one car still needs a recall repair, decode its VIN or check it with NHTSA.
Owner complaints
17 complaints1 injuries
What owners report most
Latest complaints
- Power train
The contact owns a 2018 GMC Sierra Denali 1500. The contact stated that on several occasions while driving at speeds over 30 MPH, the vehicle started shaking abnormally. The contact stated that the vehicle stalled while driving on three separate occasions and stalled twice while slowing down. There…
The contact owns a 2018 GMC Sierra Denali 1500. The contact stated that on several occasions while driving at speeds over 30 MPH, the vehicle started shaking abnormally. The contact stated that the vehicle stalled while driving on three separate occasions and stalled twice while slowing down. There was no warning light illuminated. The vehicle was able to restart each time, but on one occasion, several attempts were needed to restart the vehicle. The vehicle was taken to a dealer, where it was diagnosed, and determined that the transmission, torque converter, exhaust gaskets, filter, and 8D fluid needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was approximately 87,000.
- Engine · Structure
The contact owns a 2018 GMC Sierra 1500 Denali. The contact stated that while driving at an undisclosed speed, and while the vehicle was parked, the running boards unexpectedly lowered. Additionally, there was oil leaking from the vehicle, and the check engine warning light was illuminated. The…
The contact owns a 2018 GMC Sierra 1500 Denali. The contact stated that while driving at an undisclosed speed, and while the vehicle was parked, the running boards unexpectedly lowered. Additionally, there was oil leaking from the vehicle, and the check engine warning light was illuminated. The vehicle was taken to the dealer, where it was diagnosed with camshaft failure. The contact was informed that the camshaft needed to be replaced. The vehicle was repaired. The manufacturer was made aware of the failure. The approximate failure mileage was 107,000.
- Structure › Body
The contact owns a 2018 GMC Sierra 1500 Denali. The contact stated while exiting a parking lot, the passenger’s side running board detached from the vehicle causing minor damages to the passenger’s side of the vehicle. There was no warning light illuminated. The dealer was contacted but provided no…
The contact owns a 2018 GMC Sierra 1500 Denali. The contact stated while exiting a parking lot, the passenger’s side running board detached from the vehicle causing minor damages to the passenger’s side of the vehicle. There was no warning light illuminated. The dealer was contacted but provided no assistance and advised the contact that the running board needed to be replaced. The vehicle was not repaired. The manufacturer was contacted but provided no assistance. The failure mileage was 35,000.
- Service brakes
Certain 2018 GMC sierra 1500 denalis were issued a recall for the "electronic brake control module". For my vin, it doesn't show that that issue needs to be fixed (i just purchased this truck last week), but it indeed does. When coasting at a low speed on a small hill, brakes almost feel non…
Certain 2018 GMC sierra 1500 denalis were issued a recall for the "electronic brake control module". For my vin, it doesn't show that that issue needs to be fixed (i just purchased this truck last week), but it indeed does. When coasting at a low speed on a small hill, brakes almost feel non existent. GMC recalled many of their vehicles to get this issue sorted out with a simple, "software update". For some odd reason my gmc's vin wasn't up for a recall when it clearly needs one, im pleading for some help; I'm worried for my safety because of this manufacturer defect. Any help IS appreciated, thank you.
- Structure › Body
Hood vent fell off while driving normal speeds on the highway and hit the car behind me. I feel that the cheap plastic IS defective and could cause a problem with the part going airborne at high speeds and hitting other cars.
- Engine · Power train
Driving down the highway about 65mph it made a loud clunk and I took it in to service department and they told me I would have to pay about $400.00 to drain the transmission fluid and replace it. I told them m pick up only has less than 15,000 miles on it I don't think this IS fair, the service…
Driving down the highway about 65mph it made a loud clunk and I took it in to service department and they told me I would have to pay about $400.00 to drain the transmission fluid and replace it. I told them m pick up only has less than 15,000 miles on it I don't think this IS fair, the service gu said the don't pay for it and other GMC denali customers had theirs done and problem was solved and I wasn't the only customer that had the issue and cory from alaska auto body said it was safe to drive
- Electronic stability control (esc) · Service brakes · Steering
I nearly died when my brakes failed on my 2018 GMC denali this morning. I was only going 60 mph when another driver cut in front of me, and hit their brakes but when I tried to stop, I could not! I then began swerving from lane to lane because it was raining. Thank god I didn't die and that the…
I nearly died when my brakes failed on my 2018 GMC denali this morning. I was only going 60 mph when another driver cut in front of me, and hit their brakes but when I tried to stop, I could not! I then began swerving from lane to lane because it was raining. Thank god I didn't die and that the person on the right slowed down and moved out the way. The truck seemed to be pulling me to the right. Why I have no idea. But why IS gm putting people lives at risk like this? Why are we having to suffer or put our families in jeopardy. This makes no sense. My chest started hurting really bad afterwards, because I was so scared. I was on a 2 lane highway going straight but even that doesn't cause a vehicle not to respond like it did.
- Electronic stability control (esc) · Service brakes · Steering
On the morning of oct 26, 2020 @ 845am... I was heading south on 287 in mansfield tx. It was raining hard so I was only going 60 mph. The car in front of me was going 55 or so. When the rain and wind picked up, the car in front of me abruptly hit its brakes. That's when my truck brakes locked and I…
On the morning of oct 26, 2020 @ 845am... I was heading south on 287 in mansfield tx. It was raining hard so I was only going 60 mph. The car in front of me was going 55 or so. When the rain and wind picked up, the car in front of me abruptly hit its brakes. That's when my truck brakes locked and I began sliding or being pulled to the right. I was in the left lane on the 2 lane highway. Had it not been for god and me, not panicking... I would have crashed! My truck fish tailed twice while I was trying to apply the brakes but... I couldn't stop. I almost put the truck gear in neutral but it was raining so somehow the truck managed to slow down going up a small hill, giving me control back. There were 2 other cars that seen this. I was a nervous wreck! I immediately got off the highway and went to the first gas station I saw and thanked god nothing happened. The problem I have IS, what if my family were in the vehicle? How IS it that gm IS allowed to sell these vehicles? Also, I searched almost every website and included my vin... But every reply says my truck IS ok (until today). I haven't had this truck for a year yet. But I'm ready to trade it in. I don't feel safe at all. I almost want to get my truck towed home. Why put people lives in jeopardy?
- Steering
While driving highway speed (75mph) the steering went out as I was trying to go thru a curve., I had to use both hands and force the wheel to turn to exit highway. luckily it was only a slight turn I was trying to navigate! It threw service code'c0475, they say it's the steering gear! $2700 fix I believe it's electronic error.
- Structure › Body · Suspension
The rear end makes noise when turning and sometimes stoping. When weight IS place on bed the rear end make noises. Something IS wrong in the rear end of this truck. When truck IS moving and turning you can here the noise.
- Wheels
While getting my truck inspected the shop owner told me about a bulge on right front tire. He asked me if they sold that to me like that I proceeded to tell him yes. He said it should be reported so that IS what I'm doing. I'm not sure if this IS covered. I considered it a safety when vehicle was purchased in tennessee and going to upstate ny, and I'm 74 yrs old. Widow
- Engine
TL* the contact owns a 2018 GMC sierra denali. The contact received notification of nhtsa campaign number: 19v328000 (engine) however, the part to do the recall repair was not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair.…
TL* the contact owns a 2018 GMC sierra denali. The contact received notification of nhtsa campaign number: 19v328000 (engine) however, the part to do the recall repair was not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. Soechtin motors GMC located at (603 east kingsbury street, seguin, tx 78155, (830)355-2098, was contacted and confirmed that the part was not available. The manufacturer was not made aware of the issue. Parts distribution disconnect.
- Exterior lighting
TL* the contact owns a 2018 GMC sierra denali. The contact stated that while driving at night, the headlamps failed to adequately illuminate the roadway. The vehicle was taken to murdock chevrolet buick GMC cadillac located at (1955 main st, logan, ut 84341, (888) 470-5760) where the technician…
TL* the contact owns a 2018 GMC sierra denali. The contact stated that while driving at night, the headlamps failed to adequately illuminate the roadway. The vehicle was taken to murdock chevrolet buick GMC cadillac located at (1955 main st, logan, ut 84341, (888) 470-5760) where the technician attempted to adjust the headlamps however, the headlamps were already adjusted to specs. The contact stated that there was no improvement in visibility while shifting from low beam to hi beam. The vehicle was not repaired. The manufacturer was notified of the failure. The contact requested that the vehicle be bought back by the manufacturer and the manufacturer refused. The approximate failure mileage was 4,000.
- Engine · Service brakes · Unknown or other
1-IT needs to apply the brake so hard to make it stop at 100 km/hr and above.. 2-there IS a jerk on down '2ND to 1ST "and up shifting 1ST to 2ND gear. 3-front parking sensors sensitivities IS not accurate .
- Engine
TL* the contact owns a 2018 GMC sierra denali. The contact received a recall notification for nhtsa campaign number: 19v328000 (engine). The contact stated that the manufacturer exceeded a reasonable amount of time for the recall repair. The dealer was not contacted. The manufacturer was notified…
TL* the contact owns a 2018 GMC sierra denali. The contact received a recall notification for nhtsa campaign number: 19v328000 (engine). The contact stated that the manufacturer exceeded a reasonable amount of time for the recall repair. The dealer was not contacted. The manufacturer was notified of the issue and stated that the part was not available. The contact had not experienced a failure. Vin tool confirms parts not available.
- Exterior lighting › Headlights
TL* the contact owns a 2018 GMC sierra denali. The contact stated that the headlights vibrated and bounced while the vehicle was in motion. While driving on rough terrain and also when approaching oncoming traffic, it was difficult for the contact to see the road. The vehicle was taken to the…
TL* the contact owns a 2018 GMC sierra denali. The contact stated that the headlights vibrated and bounced while the vehicle was in motion. While driving on rough terrain and also when approaching oncoming traffic, it was difficult for the contact to see the road. The vehicle was taken to the dealer (murdock manhattan chevrolet-cadillac, 600 mccall rd, manhattan, ks 66502, (785) 783-0639) where it was determined that there was no failure with the headlights. The vehicle was not repaired. The manufacturer was made aware of the failure and a case was opened. The failure mileage was approximately 6,181. *Tt
- Exterior lighting
TL* the contact owns a 2018 GMC sierra denali. While driving various speeds, the headlights moved when driving over a bump in the road. The vehicle was taken to whitaker buick GMC (131 19TH st sw, forest lake, mn 55025, (651) 464-5612) and mccarthy auto world (3350 129th ave nw, coon rapids, mn…
TL* the contact owns a 2018 GMC sierra denali. While driving various speeds, the headlights moved when driving over a bump in the road. The vehicle was taken to whitaker buick GMC (131 19TH st sw, forest lake, mn 55025, (651) 464-5612) and mccarthy auto world (3350 129th ave nw, coon rapids, mn 55448, (763) 210-4576) and was informed that the headlights were operating as designed. The contact notified the manufacturer of the failure and a case was opened. The approximate failure mileage was 200.
Service bulletins
Technical service bulletins and other communications the manufacturer sent dealers about this vehicle. Ask a dealer for the full document by its number.
- 11011989This service bulletin provides information on the harmful effects of ethylene glycol in transmission fluid.
- 11011900This diagnostic tip bulletin provides additional information on how to diagnose a possible valve, lifter or camshaft issue.
- 11011805This Preliminary information communicates a GM part number forreflective high temperature heat or insulating tape when repairing wiring harnesses.
- 11011709This bulletin advises the dealers to maintain the vehicle stock on hand by doing a full inspection on the vehicles before being sold (prepping) to the customer.
- 11011205This informational bulletin explains Unscheduled Supplemental Services and the importance of GM Simplified Maintenance Schedules.
- 11011119This Preliminary information communicates to dealers GM is working on a solution for outdated Apps
- 11010874This bulletin provides information on how to look for and test for DEF or water in the fuel system and what the specs should be.
- 11010576This service bulletin provides information on All hazmat parts being returned to the Warranty Parts Center (WPC) must be shipped using Central Transport. Hazardous materials should never be sent by air transportation to the WPC.
- 11010545This service bulletin provides information on key code security rules and information on GM keycode look-up applications (U.S).
- 11010544This service bulletin explains how to measure for oil consumption and possible reasons for loss of oil.
- 11010495This bulletin provides information on Warranty Administration Required Operating Procedures - 8 Points (U.S. Only).
- 11010493This warranty administration service bulletin provides information about GM Accessories - Dealer-Installed, Repaired or Replaced During Warranty Coverage Period.
- 11010491This warranty administration bulletin provides policy information for GM courtesy transportation and roadside assistance programs.
- 11010490This service bulletin provides guidelines and diagnostic/repair information to technicians regarding vehicle engine oil consumption.
- 11010488This Warranty Administration bulletin provides information on the Global Warranty Management (GWM) Warranty Parts Center (WPC) Parts Return Program.
- 11010421This warranty administration bulletin provides policy information on the requirements for 12V battery testing and warranty replacements.
- 11009764This service bulletin provides information on Concerns or Questions Regarding Installation of Dealer Installed Accessories.
- 11009756This bulletin provides information on Policies Applicable to All U.S. Dealers for Engine and Transmission Assembly Replacement Under Warranty, Policy or Customer Enthusiasm and information on Submission of Warranty Transaction in Global Warranty Management.
- 11009532This service bulletin provides information for maintenance cleaning of the fuel injectors and gasoline detergent additive.
- 11009531This service bulletin provides information for maintenance cleaning of the fuel injectors and gasoline detergent additive.
- 11009088This service bulletin provides information on some vehicles that may rock or move slightly forward or rearward while in Park at start up after cold soak. This condition may be accompanied by a clunk noise. This is a slight movement that is more often seen visually, rather than felt, when viewed from the outside and using the auto-start feature, if equipped.
- 11009039This warranty administration bulletin provides policy information, proper labor operation selection and causal part identification for warranty transactions (U.S. Only).
- 11009037This service bulletin provides information on Enhancing Field Product Reports with Digital Pictures.
- 11008956This service bulletin provides information for dealers/technicians on When and How to Submit a Field Product Report (FPR) (U.S. and Canada Dealers Only).
- 11008906This service bulletin provides graphics, information and guidelines for engine component wear to assist service personnel as a guideline to perform necessary engine repairs and prevent unnecessary engine replacement.
- 11008898The bulletin provides direction on how to locate the Temporary Service Part (TSP) form in GlobalConnect.
- 11007936This service bulletin provides information to dealership personnel on diagnosis and replacement of shock absorber and strut due to fluid leak.
- 11007935This service bulletin provides information to dealership personnel on diagnosis and replacement of shock absorber and strut due to fluid leak.
- 11007721This service bulletin provides information on AGM batteries that require less frequent charging in storage.
- 11007208This Preliminary Information communication provides information to the technician about changing the tire and wheel size on vehicles. General Motors will only support a tire calibration for tires that have been sized, tested and designed for the vehicle in question and its applications. Technician should not use the information that is provided by the antilock braking system tire size selection.
- 11007155This informational bulletin advises the technician that the engine and related parts will be debited if found that the tech did not properly prepare the engine block from dirt and debris in bolt holes or if found that the block was damaged by the tech.
- 11007121This bulletin provides information on Engine Concerns that could result from lack of scheduled maintenance, improper service or aftermarket calibrations.
- 11007116This bulletin provides information on identifying Non-GM Engine Calibrations for Gasoline Engines using the Tech 2 or GDS 2.
- 11007115This service bulletin provides information on Internal Engine Noise or Damage After Oil Filter Replacement.
- 11007095This bulletin provides information on the TOP TIER Detergent Gasoline Licensed Brands and the TOP TIER Diesel Fuel Licensed Brands that are recommended for use in all GM vehicles and the TOP TIER FUELS website URL.
- 11007091This service bulletin provides guidelines and diagnostic/repair information to technicians regarding vehicle engine oil consumption.
- 11006682This service bulletin provides information on a guide to help reduce repeat visits for the same customer concern.
- 11006670This service bulletin advises about the possible issues that may occur when using a scotch brite pad or highly abrasive disk on gasket sealing surfaces or reused parts.
- 11006644This Warranty Administration service bulletin provides information for dealers/Service advisors on when and how to submit a Pre-Repair Authorization (PRA).
- 11006621Vehicle Wide Programming (VWP) is a new process to update software on GM Vehicles. It provides the ability via a single selection within Techline Connect to first identify which modules need updating and then proceed to updating affected modules (with some exceptions). The updating of modules is completed in parallel instead of the technician needing to update one module at a time. This allows a more streamlined approach for dealers and customers.
Every GMC Sierra Denali model year
Bars are owner complaints, dots mark years with recalls. Select a year to open its report.