The service and repair manual for the 1998 GMC B7 — 6.0L V8 and 7.2L I6 and 7.0L V8 and 6.5L V8 and 6.6L I6 engines, 2 trims. Matched to this exact model year, so the specifications and sequences are the ones GMC published for your car, not figures carried over from a neighbouring year.
01 / FitmentWhat this manual covers
| Model year | 1998 |
|---|---|
| Engines | 6.0L V8 — OHV 7.2L I6 — OHV, turbocharged 7.0L V8 — 427 cu in, OHV 6.5L V8 — OHV, turbocharged 6.6L I6 — OHV, turbocharged |
| Trims | B7T042 · B7T042 Bus (School) - Cab Forward |
| Federal record | 3 recalls · 0 complaints · 17 technical service bulletins (refreshed 2026-08-21) |
02 / Known issuesRecalls on federal record for the 1998 B7
- Steering — gear box (other than rack and pinion) · 98V237000This could lead to loss of steering, increasing the risk of a vehicle crash.
- Electrical System — wiring › front underhood · 98V073000This condition can cause reduced braking capability of the front brakes, increasing the risk of a cr.
- Service Brakes, Air — antilock · 00V232008This condition could cause the abs ecu to exhaust the air at the air brake modulators for one or mor.
Owners have filed 0 complaints and GMC has issued 17 technical service bulletins for the 1998 B7. The manual carries the manufacturer's diagnostic and repair procedures behind these systems.
FAQQuestions about the 1998 B7 manual
Is this manual specific to the 1998 B7?
Yes. It is the OEM manual matched to the 1998 model year, covering the 6.0L V8 and 7.2L I6 and 7.0L V8 and 6.5L V8 and 6.6L I6 across the B7T042, B7T042 Bus (School) - Cab Forward trims. Specifications and procedure sequences are the ones GMC published for this year.
What 1998 B7 problems does it help with?
3 recalls are on federal record for the 1998 B7, covering steering, electrical system, service brakes, air. The manual carries the manufacturer's diagnostic and repair procedures for those systems; the recall repairs themselves are done free by GMC dealers.
Does it include 1998 B7 wiring diagrams?
Yes — the complete wiring diagrams for the 1998 build, alongside repair procedures, specifications and diagnostics.
Is it a subscription?
No. $29.99 once and the manual is yours. It is a digital manual — nothing ships; access details arrive by email after checkout and it works on any device.
RelatedOther B7 years and 1998 GMC models
2002 B7 · 2001 B7 · 2000 B7 · 1999 B7 · 1997 B7 · 1996 B7 · 1995 B7 · 1994 B7 · 1993 B7 · all 10 years
1998 GMC C1500 · 1998 GMC C1500 Suburban · 1998 GMC C2500 · 1998 GMC C2500 Suburban · 1998 GMC C3500 · 1998 GMC C3500HD · 1998 GMC C6500 Topkick · 1998 GMC C7500 Topkick · 1998 GMC Jimmy · 1998 GMC K1500 · 1998 GMC K1500 Suburban · 1998 GMC K2500 · every 1998 model