The worst 1999 GMC B7 problems
Ranked by number of owner complaints. Mileage and cost come from what owners wrote.
Problems by type
Tap a problem to see which part fails, at what mileage and in which other years.
Recalls 3
Service brakes, air: antilock
- What is wrong
- 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 erratic sensor signal.
- 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.
- Remedy
- Dealers will replace the ABS ecu.
Recall number 00V232008 · Recall details
Power train: automatic transmission
- What is wrong
- 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
- 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.
Recall number 00V236000 · Recall details
Power train: automatic transmission
- What is wrong
- 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
- With this condition, the vehicle may move in a direction not anticipated by the driver, increasing the risk of a crash.
- Remedy
- Dealers will install a new shift cable.
Recall number 99V320000 · Recall details
Technical service bulletins for the 1999 GMC B7 25
Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.
- This warranty administration bulletin provides information regarding the field action courtesy...
- This technical bulletin provides a procedure to reprogram the media disc player with the latest...
- Vehicle Recalls
- Refinishing Aluminum Wheels This bulletin updates General Motor's position on refinishing aluminum wheels
- Underbody Component Corrosion The following information may be helpful when addressing underbody component...
- Expanded Availability for Remanufacture and Return (R&R) Electronic Control Modules
- Saab/hummer/gm: diagnostic tips/recommendations when power steering pump replacement is necessary....
- Information on air brake park brake chamber vent holes to avoid water intrusion. tt
- Effect of steering box limiter adjustment on turning radius and possibility of power steering system...
- Engine backfire and related driveability issues. tt
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Questions about the 1999 GMC B7
Is the 1999 GMC B7 reliable?
Owners have filed 0 complaints about the 1999 GMC B7.
What is the most common problem with the 1999 GMC B7?
There are not enough complaints to tell.
How many recalls does the 1999 GMC B7 have?
3 recalls, covering service brakes, air and power train.
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