This factory service and repair manual for the 1994 GMC B7 lists three engines, covering the 6.0L and 7.0L OHV gasoline V8s alongside the turbocharged 6.6L OHV inline-six diesel. Only one body sits behind that lineup, a cab forward school bus carrying the B7T042 designation. Two gasoline V8s and a turbodiesel six is a wide spread for one chassis, and the specifications, torque values and diagnostic charts are separated by engine so that nothing gets applied to the wrong one.
Engines covered
- 6.0L V8 (366 cu in) — OHV, naturally aspirated, gasoline
- 7.0L V8 (427 cu in) — OHV, naturally aspirated, gasoline
- 6.6L inline-six (403 cu in) — OHV, turbocharged, diesel
Body styles covered
- Bus (school), cab forward
Trims covered
- B7T042
Known issues on the 1994 B7. Federal records list no recall for this bus, and NHTSA has taken no owner complaints on it. The manual therefore works as a reference rather than a remedy. Each of the three engines has its own procedures, specifications, torque values, wiring diagrams and diagnostics, and the cab forward chassis material covers brakes, steering, suspension, driveline and body wiring, which together account for most of what a district shop touches on a bus this size.
Expanded Availability for Remanufacture and Return (R&R) Electronic Control Modules
EFFECT OF STEERING BOX LIMITER ADJUSTMENT ON TURNING RADIUS AND POSSIBILITY OF POWER STEERING SYSTEM DAMAGE DUE TO IMPROPER ADJUSTMENT. VARIOUS 1990-2004 MODELS. *TT
RELEASE OF NEW REAR BRAKE PIPE SHIELDS. *TT
INFORMATION ON FUEL TANK SHIELDS. *TT
EXPERIENCING NOISY RELEASE BEARING, SLIPPING CLUTCH OR INOERATIVE CLUTCH. *TT
CONCERNS WITH INTERMITTENT MULTIFUNCTION ALARM ACTIVATION. *TT
INFORMATION REGARDING DAYTIME RUNNING LIGHTS (DRL) FLICKER CONDITION. *TT
VEHICLES WITH 6.0L AND 7.0L ENGINES (VINS P, M - RPOS LS0, LR0) MAY EXHIBIT ENGINE EXHAUST NOISE WHICH IS LOUDEST DURING COLD ENGINE OPERATION. *YC
