GMC B7 Recalls

The GMC B7 has 8 recalls spanning the 1993–2000 model years, with the most serious being a steering shaft defect on 1997 models where an incorrectly sized intermediate shaft can separate at the slip joint, causing complete loss of steering control.

Also on 1997 models equipped with a 6.0L gasoline engine and power steering, a supply hose interference condition can cause steering fluid to leak until all power assist is lost, again leaving the driver without steering control. The 1999 model year has two separate powertrain concerns: transmission fluid can leak from a heat-degraded cooler hose onto the exhaust system on the passenger side, creating a fire risk, and the transmission shift cable can pull free from an improperly crimped rod end, leaving the driver unable to select gears manually and allowing the vehicle to move in an unintended direction. On 2000 models equipped with a 7.4L gasoline engine and an IMPCO LPG conversion kit, engine backfires can damage the air intake system and dislodge air cleaner components, which can then contact the hot exhaust manifold or EGR valve tube and start a fire.

On the braking side, 1998 models equipped with air brakes and anti-lock brake systems have two issues. Brake control wiring in the engine compartment can chafe and ground out, disabling the anti-lock brake system and reducing front braking capability. Separately, those same model year vehicles built with a Bendix air ABS unit can experience unwanted ABS activation at low speeds due to chafed wheel speed sensor wires, which exhausts air from the brake modulators and extends stopping distances. Going back to the start of the production run, 1993 models have a throttle body injector condition where the throttle cam lever can disengage from the drive shaft and send the engine to wide-open throttle without warning.