This factory service and repair manual for the 1989 Chevrolet S7 has to serve two very different engines in the same cab-forward school bus: a 6.0-liter V8 of 365 cubic inches on gasoline and an 8.2-liter V8 of 501 cubic inches on diesel. The body configuration and the S7T042 designation stay single. Where the two engines diverge, in fuel handling, injection and the supporting circuits, the manual keeps their procedures and specifications apart rather than folding them together.
Engines covered
- 6.0L V8 (365 cu in) — gasoline
- 8.2L V8 (501 cu in) — diesel
Body styles covered
- Bus (school), cab forward
Trims covered
- S7T042
Known issues on the 1989 S7. The federal record for the 1989 S7 is clean, with no recalls and no owner complaints recorded. That puts the weight on coverage: engine mechanical, fuel and cooling procedures for both the gasoline 6.0-liter and the diesel 8.2-liter, each with its own torque values and clearances; driveline, axle and brake service for the chassis they share; steering and suspension specifications; and the wiring diagrams and diagnostic charts for the bus body and chassis circuits.
