1999 GMC B7 Chassis recalls & complaints

1. Transmission / drivetrain

What's wrong, in plain English: The parts that send engine power to the wheels. Failure can mean a sudden loss of power or the car rolling away. 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.

What could happen: WITH THIS CONDITION, THE VEHICLE MAY MOVE IN A DIRECTION NOT ANTICIPATED BY THE DRIVER, INCREASING THE RISK OF A CRASH.

The fix: DEALERS WILL INSTALL A NEW SHIFT CABLE.

What to do

1. Check whether your car is affected: enter your 17-digit VIN at nhtsa.gov/recalls. A recall covers specific VINs, not every 1999 B7 CHASSIS.
2. Book a repair at any authorized GMC dealer. Quote NHTSA campaign 99V320000.
3. The repair is free. By US law, safety recall repairs cost the owner nothing, no matter the car's age or mileage.
4. Buying this car used? Ask the seller for proof the recall was completed, or run the VIN yourself before paying.

2. Transmission / drivetrain

What's wrong, in plain English: The parts that send engine power to the wheels. Failure can mean a sudden loss of power or the car rolling away. 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.

What could happen: THIS CONDITION COULD RESULT IN A FIRE.

The fix: 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.

What to do

1. Check whether your car is affected: enter your 17-digit VIN at nhtsa.gov/recalls. A recall covers specific VINs, not every 1999 B7 CHASSIS.
2. Book a repair at any authorized GMC dealer. Quote NHTSA campaign 00V236000.
3. The repair is free. By US law, safety recall repairs cost the owner nothing, no matter the car's age or mileage.
4. Buying this car used? Ask the seller for proof the recall was completed, or run the VIN yourself before paying.

3. Brakes

What's wrong, in plain English: Anything that slows the car down. Treat brake recalls as urgent. 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.

What could happen: 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.

The fix: DEALERS WILL REPLACE THE ABS ECU.

What to do

1. Check whether your car is affected: enter your 17-digit VIN at nhtsa.gov/recalls. A recall covers specific VINs, not every 1999 B7 CHASSIS.
2. Book a repair at any authorized GMC dealer. Quote NHTSA campaign 00V232008.
3. The repair is free. By US law, safety recall repairs cost the owner nothing, no matter the car's age or mileage.
4. Buying this car used? Ask the seller for proof the recall was completed, or run the VIN yourself before paying.

Owner complaints filed with NHTSA

Most complained-about parts: Engine (1).

Complaints are unverified reports from owners. A pattern (many complaints about the same part) matters more than any single one.