This Knowledgebase has been developed to cover the most frequently asked questions about Corvettes. Using our system, you can search for topics separated into categories by Corvette generation. Some of the information here comes directly from Chevrolet Service News publications, Service Bulletins, Recall Notices and other technical sources as indicated.
This Knowledgebase contains most service bulletins and recall notices for all model years. If you can't find a particular service bulletin here, try our Corvette Recall Notice & Service Bulletin Search Form which is linked to the National Highway Transportation Safety Administration. You will only be able to view a brief description of the bulletins from the NHTSA but must pay a fee to acquire the entire document.
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1990 - 1991: Service Bulletin: Hard Start on Hot Restart / Increased Idle Speed
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 Bulletin Bulletin Number: 47-65-03 - (01/24/ ...
1990 - 1992: Service Bulletin: Engine Noise - Install Bushing
Subject: ENGINE NOISE-INSTALL BUSHING 5.7L V8 (RPO LT5) Model and Year: 1990-92 CORVETTE WITH 5.7L ENGINE (RPO LT5) AND MANUAL TRANSMISSION Source: Chevrolet Service Bulletin Bulletin Number: 92-230-6 - (06/15/1992) Condition: Some owners of 1990-92 Corvette ZR-1 may comment on a squeal noise ...
1990 - 1992: Service Bulletin: Engine Service Program
Subject: ENGINE SERVICE PROGRAM - LT5 5.7L CORVETTE ZR1 ENGINE (VIN CODE J) Model and Year: 1990-92 CORVETTE ZR1 Source: Chevrolet Service Bulletin Bulletin Number: 92-228-6 - (06/01/1992) THIS BULLETIN CANCELS AND SUPERSEDES DEALER SERVICE BULLETIN NO. 90-59-5. DATED SEPTEMBER 1990. THE 1991 A ...
1990 - 1995: Technical Article: LT5 Secondary Port Operation & Vacuum Diagnosis
LT5 Secondary Port Operation & Vacuum Diagnosisby 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 popular misconceptions about the LT5 engine and establish ...
1990: Campaign: Fuel Lines May Crack / Fuel Leak
Subject: CAMPAIGN: FUEL LINES MAY CRACK/FUEL LEAK Model and Year: 1990 CHEVROLET CORVETTES WITH LT5 ENGINES Source: Chevrolet Service Bulletin Bulletin Number: 90-C-10 - (01/30/1990) The National Traffic and Motor Vehicle Safety Act, as amended, provides that each vehicle which is subject to a ...
1990: Service Bulletin: Leaking Radiator Hose Service
Subject: LEAKING RADIATOR HOSE SERVICE (REPLACEMENT OF RADIATOR HOSE) Model and Year: 1990 CORVETTE WITH 5.7L (VIN CODE J) ENGINE Source: Chevrolet Service Bulletin Bulletin Number: 90-308-6B - (07/19/1990) TO: ALL CHEVROLET DEALERS Condition: Some of the above vehicles, prior to VIN L5800913 ...
1992: Service Bulletin: Lack of Wide Open Throttle Engine Underpower
Subject: LACK OF WOT-LOW ENGINE POWER REVISED CABLE ADJUSTMENT PROC. Model and Year: 1992 CORVETTE ZR-1 WITH 5.7L ENGINE AND MANUAL TRANSMISSION Source: Chevrolet Product Emission Campaign Bulletin Number: 92-214A-7B - (07/01/1992) THIS BULLETIN CANCELS AND SUPERSEDES DEALER SERVICE BULLETIN NO ...
1994 - 1995: Characteristics of A.L. Dunn Cylinder Heads
From Greg Van Deventer, Mercury Marine - October 18, 2000: "The A.L. Dunn cylinder heads have as cast intake and exhaust ports. All cylinder heads up to that point were from the same mold. The '90 - '92 cylinder heads were as cast, (intake port diameters can be less than 32mm) with exception ...
This Knowledgebase has been developed to cover the most frequently asked questions about Corvettes. Using our system, you can search for topics separated into categories by Corvette generation. Some of the information here comes directly from Chevrolet Service News publications, Service Bulletins, Recall Notices and other technical sources as indicated.
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