SERVICE MANUAL UPDATE SERPENTINE BELT TENSION

VEHICLES AFFECTED: 1988 - 89 YB CORVETTES EQUIPPED W/5.7L (VIN CODE 8)

* THIS SERVICE MANUAL UPDATE HAS BEEN REVISED TO INCLUDE THE 1988 SERVICE MANUAL AND TO CORRECT THE BELT TENSION SPECIFICATION.

The following supersedes information previously published in the 1988 and 1989 Corvette Service Manual (ST-364-89) on the following pages.

1988 Service Manual Section 3B9. "Power Rack and Pinion", Page 3B9-3 and Section 6B9 "Engine Cooling", Page 6B-9 1989 Service Manual Section 3B1 "Power Rack and Pinion", Page 3B1-2 and Section 6B "Engine Cooling", Page 6B-12

To check belt tension, install Tension Gauge J 23600-B between the generator and air pump. The belt tension specification is 267-400 N. (60 -90 lbs.).

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.