This factory service and repair manual for the 1998 GMC T7500 answers for three engines rather than two. Alongside the naturally aspirated 6.0L gasoline V8 sit a pair of turbocharged overhead-valve inline-six diesels, 7.2L and 6.6L, and each brings its own service intervals, clearances and torque figures. The F7B042 is the single configuration listed for the year. Because the diesels dominate the list, much of the book concerns fuel delivery, air handling and cooling, with specifications, wiring diagrams and diagnostic procedures organized so the right engine's numbers are easy to isolate.
Engines covered
- 6.0L V8 (366 cu in) — OHV, naturally aspirated, gasoline
- 7.2L inline-six (441 cu in) — OHV, turbocharged, diesel
- 6.6L inline-six (403 cu in) — OHV, turbocharged, diesel
Trims covered
- F7B042
Known issues on the 1998 T7500. No recalls sit on the federal record for this truck and no owner complaints are logged with NHTSA, so there is no pattern of failure to point a technician at any one system. The manual is the reference that matters instead, covering the three listed engines with removal and installation procedures, published specifications and torque values, and with wiring diagrams and diagnostics for the chassis circuits that tie the cab, the charging system and the brakes together.
This warranty administration bulletin provides information regarding the field action courtesy transportation policy.
THIS TECHNICAL BULLETIN PROVIDES A PROCEDURE TO REPROGRAM THE MEDIA DISC PLAYER WITH THE LATEST CALIBRATIONS TO CORRECT A CONDITION OF THE REAR ENTERTAINMENT SYSTEM NOT OPERATING AS INTENDED IN COLDER AMBIENT TEMPERATURE AREAS DUE TO CALIBR
Expanded Availability for Remanufacture and Return (R&R) Electronic Control Modules
SOME MEDIUM DUTY TILT CAB TRUCKS WITH 3116 CATERPILLAR DIESEL ENGINES EQUIPPED WITH 26 INCH FAN BLADES MAY EXHIBIT THE ENGINE OVERHEAT LAMP ON, AND THE TEMPERATURE GAUGE IN THE RED ZONE. *TT
ON SOME MEDIUM DUTY TRUCKS EQUIPPED WITH A DIESEL ENGINE, AIR BRAKES, AND THE ENGINE SHUTDOWN FEATURE, THE MULTI-FUNCTION ALARM MODULE MAY NOT PERFORM CERTAIN FEATURES SUCH AS: NO WARNING TONE FOR AIR BRAKE LOW PRESSURE; NO WARNING TONE FOR
AIR INLET RESTRICTION GAUGES THAT POP OR THAT THE VEHICLE EXHIBITS LOW HORSEPOWER. YD
