1997 - 1998 Corvette: Service Bulletin: Belt Rumble Noise at Low Idle Speeds

Estimated Reading Time: 1 Minutes

Subject: BELT RUMBLE NOISE AT LOW IDLE SPEEDS (INSTALL ACCESSORY DRIVE BELT TENSIONER/ACCESSORY DRIVE BELT)
Source: Chevrolet Dealer Technical Service Bulletin
Number: 87-61-13
Models: 1997-1998 CHEVROLET CORVETTE WITH 5.7L ENGINE (VIN G - RPO LS1) AND 4L60-E AUTOMATIC TRANSMISSION BUILT PRIOR TO VIN BREAKPOINTS: 1997--109680 1998--100060

Condition

SOME OWNERS MAY COMMENT ON ACCESSORY DRIVE BELT NOISE AT LOW IDLE SPEEDS WITH A/C ON AND P/S AT FULL TURNED LOCKED. CONDITION MAY BE MORE PROMINENT AT HIGH AMBIENT TEMPERATURES AND DURING ENGINE SHUT DOWN.

Correction

INSTALL THE PART NUMBERS LISTED BELOW

Parts Information

DESCRIPTION PART NUMBER
----------- ----------
ACCESSORY DRIVE BELT TENSIONER 12559325
ACCESSORY DRIVE BELT 12561501

GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these 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 your GM dealer for information on whether your vehicle may benefit from the information.