This factory service and repair manual for the 2001 GMC B7 puts the naturally aspirated 8.1L OHV V8 beside the turbocharged 7.2L OHV inline-six diesel as the year's two engines. It is the cab forward school bus, designated B7T042. Both engines are covered with their own specifications, torque values and diagnostic procedures, and the book then moves through the chassis, brakes, steering, driveline and electrical systems that the two builds have in common.
Engines covered
- 7.2L inline-six (441 cu in) — OHV, turbocharged, diesel
- 8.1L V8 (496 cu in) — OHV, naturally aspirated, gasoline
Body styles covered
- Bus (school), cab forward
Trims covered
- B7T042
Known issues on the 2001 B7. The federal record for this year holds no recall and no owner complaint. The manual is therefore straightforward reference material for a vehicle that spends its life in daily service. The 8.1L gasoline V8 and the turbocharged 7.2L diesel six both come with procedures, specifications, torque values, wiring diagrams and diagnostics, and the cab forward chassis coverage extends to the body electrical circuits that a school bus inspection puts under scrutiny.
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 L
THIS CONDITION COULD CAUSE THE ABS ECU TO EXHAUST THE AIR AT THE AIR BRAKE MODULATORS FOR ONE OR MOR
DEALERS WILL REPLACE THE ABS ECU.
This PI communicates the requirement to provide a pico file to receive diagnostic assistance from TAC.
Vehicle Wide Programming (VWP) is a new process to update software on GM Vehicles. It provides the ability via a single selection within Techline Connect to first identify which modules need updating and then proceed to updating affected mo
GM is receiving damaged (cracked or broken) transmission cores returned to the reman facilities. The damage is being caused either in the removal process by the technician, or inadequate packaging or shipping. This bulletin advises the deal
This service bulletin advises of a new fuel injection cleaner kit used for decarbonizing the intake valves to correct conditions of rough idle, Crank no start, extended crank or misfire, MIL with DTCs, and explains how Top Tier fuels should
This bulletin provides information for use on a Product Assistance Claim (PAC), which is formerly known as a Product Allegation Resolution (PAR) claim.
This service bulletin provides information for dealers/technicians on Service Programming System (SPS) Error Codes E4398, E4399, E4401, E4403, M4404, M4413, M6954, M6955, E4414, E4423, E4491, E4492, or E6961 and resolution information.
This technical bulletin advises of a new fuel injection cleaner kit used for decarbonizing the intake valves to correct conditions of rough idle, Crank no start, extended crank or misfire, MIL with DTCs, and explains how Top Tier fuels shou
This service bulletin provides service information to technicians on guidelines to replace Oil Cooler, Oil Cooler Lines and Oil Tank if the engine was replaced where large amounts of debris has flowed throughout the oiling system.
Showing the 8 most recent of 68 technical service bulletins on file with NHTSA.
