1997 GMC B7 service and repair manual — a detailed, factory-style reference for maintenance, diagnostics, and repair. Use it to confirm correct procedures, specifications, and system coverage before you start work.
Designed for technicians and DIY owners, this manual helps you troubleshoot accurately, follow step-by-step repair procedures, and reference wiring diagrams and system sections quickly while you work.
What’s included
- Step-by-step repair procedures and service information
- Specifications and reference data (where provided)
- Wiring diagrams and electrical sections
- Powertrain, brakes, steering, suspension, HVAC and more
Trims covered
- B7T042
- B7T042 Bus (School) - Cab Forward
Engines covered
- 6.0L 366Cu. In. V8 GAS OHV Naturally Aspirated
- 7.0L 6998CC 427Cu. In. V8 GAS OHV Naturally Aspirated
- 6.5L 395Cu. In. V8 DIESEL OHV Turbocharged
- 6.6L 403Cu. In. l6 DIESEL OHV Turbocharged
Index / Table of contents
- Body
- Brakes
- Chassis Electrical
- Driveline
- Engine Cooling
- Engine Electrical
- Engine Mechanical
- Engine Performance & Emission Controls
- Fuel System
- General Information & Identification
- Heating, Ventilation, & Air Conditioning
- Hybrid & Electric Vehicle Systems
- Steering
- Suspension
- Transmission, Clutch, & Transfer Case
- Wiring Diagrams
VEHICLE DESCRIPTION: SCHOOL BUSES EQUIPPED WITH POWER STEERING. SOME OF THESE VEHICLES WERE ASSEMBLED WITH AN INCORRECT INTERMEDIATE STEERING SHAFT. THE OVERLAP IN THE SLIP JOINT IS INSUFFICIENT ALL
THIS COULD LEAD TO LOSS OF STEERING, INCREASING THE RISK OF A VEHICLE CRASH.
DEALERS WILL INSPECT THE STEERING SHAFT AND, IF NECESSARY, REPLACE THE INTERMEDIATE STEERING SHAFT.
VEHICLE DESCRIPTION: SCHOOL BUSES EQUIPPED WITH 6.0L GASOLINE ENGINE, 10,000 LB. FRONT AXLE, AND POWER STEERING. THE POWER STEERING FLUID CAN LEAK AS A RESULT OF A POWER STEERING FLUID SUPPLY HOSE
EVENTUALLY, ALL POWER STEERING ASSIST WOULD CEASE, RESULTING IN A LOSS OF STEERING CONTROL.
DEALERS WILL INSTALL A NEW POWER STEERING HOSE AND ADAPTER.
This warranty administration bulletin provides information regarding the field action courtesy transportation policy.
00064H - SPECIAL COVERAGE (REVISED PART INFORMATION). SOME CUSTOMERS MAY EXPERIENCE A FAILURE OF THE ELECTRONIC DIESEL FUEL INJECTION PUMP. THIS SPECIAL POLICY APPLIES ONLY TO ELECTRONIC DIESEL-FUEL INJECTION PUMP REPAIRS AND/OR REPLACEMENT
Expanded Availability for Remanufacture and Return (R&R) Electronic Control Modules
SAAB/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 H
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
A FAILURE OF THE ELECTRONIC DIESEL FUEL INJECTION PUMP, LEADING TO COMPLAINTS OF POOR PERFORMANCE OR FUEL ECONOMY, HARD/NO STARTS, HESITATION, AND THE SERVICE ENGINE SOON LIGHT ILLUMINATED. SPECIAL POLICY ADJUSTMENT 00064. *TT PRODUCT FIELD
RELEASE OF NEW REAR BRAKE PIPE SHIELDS. *TT
A FAILURE OF THE ELECTRONIC DIESEL FUEL INJECTION PUMP, LEAKING TO COMPLAINTS OF POOR PERFORMANCE OR FUEL ECONOMY, HARD / NO STARTS, HESITATION, AS WELL AS ILLUMINATION OF THE SERVICE ENGINE SOON LIGHT. *TT
Showing the 8 most recent of 15 technical service bulletins on file with NHTSA.
