SERVICE MANUAL UPDATE-SEC.6A SPARK PLUG TORQUE SPECS

Subject: SPARK PLUG TORQUE SPECIFICATIONS

Model and Year: 1990 CELEBRITY, 1990-91 BERETTA, CORSICA CAMARO, CAVALIER AND LUMINA, 1990-91 U VAN (APV)

TO: ALL CHEVROLET DEALERS

When installing spark plugs in the 3.1 L engine use the following revised specification in the Service Manuals listed below:

Cast Iron or Aluminum Heads, 15 N.m (1 1 lbs. ft.)

1991 Lumina Pages 6D4 - 4, 5, 7 Cavalier Pages 6A3 - 19 Camaro Pages 6A2 - 31 Pages 6D4 - 7, 9 Corsica/Beretta Pages 6D4 - 3, 6 Pages 6A5 - 24 Lumina (APV) Pages 6A4 - 20, 46 and 6D4 - 6

1990 Celebrity Pages 6D4 - 3, 5 Lumina Pages 6D4 - 4, 5, 6 Cavalier Pages 6A3 - 19 Pages 6D4 - 3 Camaro Pages 6A2 - 30 Pages 6D4 - 7, 8 Corsica/Beretta Pages 6A5 - 20 Pages 6D4 - 2 Lumina (APV) Pages 6A4 - 17, 41 and 6D4 - 6

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those 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 a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.