NOISY/FRAYING ACCESSORY DRIVE BELT (INST. SINGLE-SIDED BELT)

Subject: NOISY/FRAYING ACCESSORY DRIVE BELT

Model and Year: 1992-93 CORVETTE WITH 5.7L (LT1) ENGINE

CONDITION:

--------- Some owners of 1992 and early 1993 model year Corvettes with 5.7L (LT1, VIN P) engines using the double-sided accessory drive belt may experience a noisy or fraying belt condition.

CAUSE:

----- Inherent stresses and/or processing of the double-sided belt.

CORRECTION:

---------- To correct this condition a change was made from the double-sided belt system to a new single-sided belt system. Starting the week of March 22,1993, VIN breakpoint #1G1YY23P4P5113150 Corvettes with LT1 engines were built with the new single-sided belt. To repair older units with the double-sided belt to a single-sided belt, the following parts must be installed:

NEW PART NO. DESCRIPTION ----------- ----------- 10230259 Belt 10227507 Tensioner 10227069 P/S Pulley 10105355 Idler Pulley 10463533 Generator 11502811 Generator Ring Terminal Nut #M8

NOTE: When replacing the new generator, the ring terminal on the wire harness will have to be opened up the 8.5mm to accommodate the larger stud on the back of the new generator.

Parts are currently available from GMSPO.

WARRANTY INFORMATION:

Labor Operation: T3367

Labor Time: 0.9 Hours

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.