Electrical and Ignition

Subject: SERVICE MANUAL UPDATE-SEC. 6D4 SPARK PLUG CODING CHART Model and Year: 1990 CORVETTESource: Chevrolet Service BulletinBulletin Number: 90-253-6D - (06/26/1990)The Spark Plug Coding Chart shown in Figure 2, Page 6D4-3, in Section 6D4 ... Read More

Description:This article was written by Mike Chaney who is a contributor to the F-body Listserv. He has done an excellent dissection of an Optispark distributor which appeared on 1992 - 1996 LT1 Corvettes. Below, he describes the replacement of an... Read More

Subject: Left Rear Engine Wiring Harness RoutingModel and Year: 1994 Corvette with LT1 EngineSource: Product CampaignBulletin Number: 94C2194C21 MARCH, 1994PRODUCT CAMPAIGN 94C21 - LEFT REAR ENGINE WIRING HARNESS ROUTING1994 CORVETTE WITH LT1... Read More

Subject: POWER SEAT INOP/BLOWS FUSES REPAIR/REPLACE HARNESS Model and Year: 1984-90 CORVETTE Source: Chevrolet Service Bulletin Bulletin Number: 90-412-10 - (03/18/1991) Condition: Power Seat (AQ9) inoperative and/or blows fuse. ... Read More

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

Source: Chevrolet Dealer Service Bulletin Number: 90-229-9 Subject: Service Manual Update - SIR Revised Code 42 Chart Model Year: 1990 Y Car This bulletin serves to revise the Code 42 Chart on page 9J-A-43 in Section 9J-A "Supplemental... Read More

Subject: S.I.R. SYSTEM DIAG. ENERGY RESERVE MODULE EXCHANGEModel and Year:1990 CAMARO, METRO (CONVERTIBLE ONLY), STORM 1991-92 CORSICA, BERETTA, CAMARO, CORVETTE, METRO (CONVERTIBLE ONLY), STORM AND CAPRICESource: Chevrolet Service BulletinBulletin... 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

This information applies to 1996-2005 passenger cars, trucks and utilities.In the past, star washers have been used under most ground connections. It was believed using a star washer would improve continuity to ground and prevent the ground fastener... Read More

#93-163-8A - REPLACEMENT OF ISOLATION DIODESMANY OF THE ELECTRICAL SYSTEMS ON OUR VEHICLES USE A DIODE TO ISOLATE CERTAIN CIRCUITS AND PROTECT THEM FROM VOLTAGE SPIKES. SOME OF THE CIRCUITS WHICH MAY USE SUCH A DIODE ARE LISTED BELOW:* A/C COMPRESSOR... Read More