Vehicle description: school buses, medium duty trucks and tractors built with bendix air ABS with an EC-17 1030r electronic control unit (ecu), there have been reports of unwanted ABS activation at low speeds caused by 1) chafed ABS wheel speed sensor wires on rotating parts or 2) a damaged component at the wheel end that generates a certain type of…
Risk and remedy
Risk
This condition could cause the ABS ecu to exhaust the air at the air brake modulators for one or more of the wheels. this could result in extended braking distances and a possible crash.
Vehicle description: medium duty trucks. the transmission fluid could leak from a heat degraded transmission fluid cooler hose onto the exhaust system on the passenger's side of the vehicle.
Risk and remedy
Risk
This condition could result in a fire.
Remedy
Dealers will install a new transmission fluid cooler inlet hose and outlet hose designed with a heat sleeve and ensure adequate clearance to the exhaust system take-down pipe. dealers will also inspect the right-hand exhaust manifold seal for leakage, and replace if necessary.
Vehicle description: medium duty conventional cab trucks and school bus chassis equipped with an automatic transmission, have transmission shift cable end rods that have not been crimped to the proper specification. over time, the shift cable could be pulled out of the rod end causing the driver to lose the ability to manually change transmission gears.
Risk and remedy
Risk
With this condition, the vehicle may move in a direction not anticipated by the driver, increasing the risk of a crash.
Technical service bulletins and other communications the manufacturer sent dealers about this vehicle. Ask a dealer for the full document by its number.
10248444Vehicle Recalls
10246631Expanded Availability for Remanufacture and Return (R&R) Electronic Control Modules
10232287This warranty administration bulletin provides information regarding the field action courtesy transportation policy.
10195303Engine Backfire and Related Driveability Issues
10190934Underbody Component Corrosion The following information may be helpful when addressing underbody component corrosion with customers. Some customers may comment that one or more of their vehicle's underbody components are showing some form of corrosion. This corrosion may be red in appearance (rust) if the component is steel, forged iron or cast iron. This corrosion may also be grey or white in color if the component is constructed of an aluminum alloy.
10190933Underbody Component Corrosion The following information may be helpful when addressing underbody component corrosion with customers. Some customers may comment that one or more of their vehicle's underbody components are showing some form of corrosion. This corrosion may be red in appearance (rust) if the component is steel, forged iron or cast iron. This corrosion may also be grey or white in color if the component is constructed of an aluminum alloy.
10190932Refinishing Aluminum Wheels This bulletin updates General Motor's position on refinishing aluminum wheels. GM does not endorse any repairs that involve welding, bending, straightening o re-machining. Only cosmetic refinishing of the wheel's coatings, using recommended procedures, is allowed. Evaluating Damage In evaluating damage, it is the GM Dealer's responsibility to inspect the wheel for corrosion, scrapes, gouges, etc. The Dealer must insure that such damage is not deeper than what can be sanded or polished off. The wheel must be inspected for cracks. If cracks are found, discard the wheel. Any wheels with bent rim flanges must not be repaired or refinished. Wheels that have been refinished by an outside company must be returned to the same vehicle. The Dealer must record the wheel ID stamp or the cast date on the wheel in order to assure this requirement. Refer to Refinisher's Responsibility Outside Company later in this bulletin.
10190931Refinishing Aluminum Wheels This bulletin updates General Motor's position on refinishing aluminum wheels. GM does not endorse any repairs that involve welding, bending, straightening o re-machining. Only cosmetic refinishing of the wheel's coatings, using recommended procedures, is allowed. Evaluating Damage In evaluating damage, it is the GM Dealer's responsibility to inspect the wheel for corrosion, scrapes, gouges, etc. The Dealer must insure that such damage is not deeper than what can be sanded or polished off. The wheel must be inspected for cracks. If cracks are found, discard the wheel. Any wheels with bent rim flanges must not be repaired or refinished. Wheels that have been refinished by an outside company must be returned to the same vehicle. The Dealer must record the wheel ID stamp or the cast date on the wheel in order to assure this requirement. Refer to Refinisher's Responsibility Outside Company later in this bulletin.
10082506This technical bulletin provides a procedure to reprogram the media disc player with the latest calibrations to correct a condition of the rear entertainment system not operating as intended in colder ambient temperature areas due to calibration concerns.
10032462Saab/hummer/gm: diagnostic tips/recommendations when power steering pump replacement IS necessary. Analysis of returned power steering (ps) pumps that had been replaced for noise, no power assist, no or low pressure and leaking conditions has indicated a high number of no trouble found results. All 1997-2010 vehicles and light trucks; 2010 and prior hummers H2/H3 and saab 9-7X vehicles.
10017531Information on air brake park brake chamber vent holes to avoid water intrusion.
10004297Effect of steering box limiter adjustment on turning radius and possibility of power steering system damage due to improper adjustment. Various 1990-2004 models.
10000563Release of new rear brake pipe shields.
10000456Engine backfire and related driveability issues.
6092588Experiencing noisy release bearing, slipping clutch or inoerative clutch.
6092584Subject regarding transmission oil cooler line degradation.
6089156Concerns with intermittent multifunction alarm activation.
634800This bulletin IS being issued to assist technicians in efficiently diagnosing and correcting backfire and other related driveability concerns.
617728Some drivers may comment about the ABS lamp illuminating. An ABS diagnostic trouble code 0281 - brake switch circuit may have been set on those vehicles equipped with hydraulic brakes. The diagnostic trouble code will be stored in memory and the ABS will be disabled.
617711Subject regarding power steering pump inlet adaptor installation.
617668Information on fuel tank shields.
617620General motors has decided that a defect which relates to motor vehicle safety exists in certain medium duty vehicles. Some of these vehicles exhibit a condition in which transmission fluid may leak from a heat degraded transmission fluid cooler hose onto the exhaust system on the passenger's side of the vehicle.
608396Subject on reduced engine power, dtc (s) p1125, p1275, p1276, p1280, p1281, p1285, and or p 1286 may be present (current or in history). *Mjs
606551Concerns with the coolant alarm and oil pressure alarm activating when the vehicle IS stopped and the engine returns to idle.
Every GMC B7 model year
Bars are owner complaints, dots mark years with recalls. Select a year to open its report.