1992 - 1993 Corvette: Service Bulletin: Noisy/Fraying Accessory Drive Belt

Subject: NOISY/FRAYING ACCESSORY DRIVE BELT (INST. SINGLE-SIDED BELT)
Model and Year: 1992-93 CORVETTE WITH 5.7L (LT1) ENGINE
Source: Chevrolet Service Bulletin
Bulletin Number: 93-273-6A

THIS BULLETIN IS BEING RE-PUBLISHED TO ADD THE LABOR TIME FOR LABOR OPERATION NUMBER E7310.

VEHICLES AFFECTED HAVE TILT STEERING COLUMNS (ROUNDS STYLE) WITH THE EXCEPTION OF THE "W" SERIES (SQUARE STYLE).

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.

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.

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