Subject: PROPER INSTALLATION AND SEATING OF THE SIR COIL ASSEMBLY Model and Year: 1989-91 CAPRICE, CAMARO, CORVETTE, CORSICA AND BERETTA Source: Chevrolet Service Bulletin Bulletin Number: 91-204-3B - (01/23/1991) CONDITION: The lower... Read More

Subject: STEERING WHEEL REMOVAL SPECIAL TOOL USAGEModel and Year:1990-91 CORVETTESource: Chevrolet Service BulletinBulletin Number: 91-321-3B - (05/10/1991) If difficulty is noted in the removal of the steering wheel on 1990-91 Y-cars when using the... Read More

Subject: SIR SYSTEM SERVICE TIPS REVISED SYSTEM Model and Year:1991 CORVETTESource: Chevrolet Service BulletinBulletin Number: 91-107-9 - (10/25/1990) TO: ALL CHEVROLET DEALERS The 1991 Supplemental Inflatable Restraint (SIR) system on the Y car is... Read More

Subject: ENGINE NOISE-INSTALL BUSHING 5.7L V8 (RPO LT5)Model and Year: 1990-92 CORVETTE WITH 5.7L ENGINE (RPO LT5) AND MANUAL TRANSMISSIONSource: Chevrolet Service BulletinBulletin Number: 92-230-6 - (06/15/1992) Condition: Some owners of 1990-92... Read More

Subject: NO START CONDITION (STARTER CORROSION-REPLACE STARTER) Model and Year: 1990-1992 Corvette, Engine Code J (LT5) Source: Chevrolet Service Bulletin Bulletin Number: 92-307-6 - (09/21/1992) CONDITION: Some ZR1 Corvettes may exhibit... Read More

Subject: HARD STARTING DURING A HOT RESTART, INCREASE IN IDLE SPEEDS, AND IDLE FLUCTUATION (REPLACE MEM-CAL) Model and Year: 1990-91 CHEVROLET CORVETTE WITH 5.7L ENGINE (VIN J - RPO LT5) AND MANUAL 6-SPEED TRANSMISSION (ML9)Source: Chevrolet Service... Read More

Subject: ENGINE SERVICE PROGRAM - LT5 5.7L CORVETTE ZR1 ENGINE (VIN CODE J)Model and Year: 1990-92 CORVETTE ZR1Source: Chevrolet Service BulletinBulletin Number: 92-228-6 - (06/01/1992) THIS BULLETIN CANCELS AND SUPERSEDES DEALER SERVICE BULLETIN NO.... Read More

LT5 Secondary Port Operation & Vacuum Diagnosis by Robert Loszewski Copyright 2001 Before getting into diagnosing the LT5 engine's secondary port vacuum system, I thought it would be a good idea to take this opportunity to clear up a few... Read More

Subject: SERVICE TIPS FOR SUPPLEMENTAL INFLATABLE RESTRAINT (SIR) Model and Year: 1991 CORVETTESource: Chevrolet Service BulletinBulletin Number: 91-107-9Section: 9Date: (November 1990)Corporate Bulletin No.: 039007 TO: ALL CHEVROLET DEALERSThe 1991... Read More

November 20, 2023 The paint may have chipped or peeled on the front fascia or fender-to-fascia body seam on some 2020-2024 Corvettes. (Fig. 9) The paint chip may be due to the headlamp being positioned too tightly to the body panel. The fit between... Read More