1990 - 1995 Corvette ZR-1

Subject: REVISED AIR CONDITIONING CONTROL CIRCUIT DIAGNOSIS Model and Year: 1990 CORVETTE WITH 5.7L L98 AND LT5 ENGINES Source: Chevrolet Dealer Service Bulletin Bulletin Number: 90-400-6E THIS BULLETIN CANCELS AND SUPERSEDES DEALER... Read More

Model Year: 1990 w/ L98 or LT5 Engine Subject: Product Campaign 90C07 Instrument Panel Wire Abrasion Source: Chevrolet Dealer Product Campaign Bulletin Number: 90C07 Section:   8C Date: January, 1990 TO: ALL CHEVROLET DEALERS... Read More

Subject: CAMPAIGN: INSTRUMENT PANEL WIRE ABRASION - REPAIR Model and Year: 1990 CHEVROLET CORVETTE W/ L98 OR LT5 ENGINESource: Chevrolet Service BulletinBulletin Number: 90-C-07 - (01/17/1990) General Motors has determined that certain 1990 Chevrolet... Read More

Subject: CAMPAIGN: INOPERATIVE PARKING BRAKE Model and Year: 1990 CHEVROLET CORVETTESource: Chevrolet Service BulletinBulletin Number: 90-C-09 - (01/24/1990) General Motors has determined that certain 1990 Chevrolet Corvette model vehicles may... Read More

Subject: LEAKING RADIATOR HOSE SERVICE (REPLACEMENT OF RADIATOR HOSE)Model and Year: 1990 CORVETTE WITH 5.7L (VIN CODE J) ENGINESource: Chevrolet Service BulletinBulletin Number: 90-308-6B - (07/19/1990) TO: ALL CHEVROLET DEALERS Condition: Some of... Read More

Subject: CAMPAIGN: FUEL LINES MAY CRACK/FUEL LEAK Model and Year: 1990 CHEVROLET CORVETTES WITH LT5 ENGINESSource: Chevrolet Service BulletinBulletin Number: 90-C-10 - (01/30/1990) The National Traffic and Motor Vehicle Safety Act, as amended,... Read More

Subject:   Engine Exchange Program Model and Year:   1990 Corvette with LT5 (VIN Code J) Engine Source:  Chevrolet Dealer Service Bulletin Bulletin No:   90-59-6 Section:   6 Date:    ... Read More

You won't find that GM discontinued part (discontinued in 1999) unless it's from someone parting-out or willing to sell a part of an assembly.SECRET:Try a non-ZR1 panel and retrofit it by drilling holes to attach a ZR1's control modules/relays... 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

The following article appeared in the Spring 2014 issue of the NCRS Corvette Restorer, written by Mike Ingham and is used here with his permission: Adventures In LTPWS Land by Mike Ingham This story concerns the Low Tire Pressure Warning... Read More