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

SUBJECT: SERVICE MANUAL UPDATE - SECTION 6A SPARK PLUG TORQUE SPEC. (CHANGED SPECIFICATION)

VEHICLE AFFECTED: 1988-91 A,W,J,F,L, U-VANS W/3.1L

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

Cast Iron or Aluminum heads, 15 N.m (11 ft.lbs.)

1991 Pontiac 6000 Pages 6D4-3, 4, 5

Chevrolet Lumina Pages 6D4 - 4, 5, 7 Pontiac Grand Prix Pages 6D4 - 4, 5, 7 Oldsmobile Cutlass Supreme Pages 6D4 - 4, 5, 7 Buick Regal Pages 6D4 - 4, 5, 7

Chevrolet Cavalier Pages 6A3 - 19

Chevrolet Camaro Pages 6A2 - 31 Pages 6D4 - 7, 9

Pontiac Firebird Pages 6A2 - 31 Pages 6D4 - 7, 9

Chevrolet Corsica/Beretta Pages 6D4 - 3, 6 Pages 6A5 - 24

Chevrolet Lumina (APV) Pages 6A4 - 20, 46 and 6D4-6 Pontiac Transport Pages 6A4- 20, 46 and 6D4 -6 Oldsmobile Silhouette Pages 6A4- 20, 46 and 6D4 -6

1990 Chevrolet Celebrity Pages 6D4 - 3, 5 Pontiac 6000 Pages 6D4 - 3, 5

Chevrolet Lumina Pages 6D4 - 4, 5, 6 Pontiac Grand Prix Pages 6D4 - 3, 4, 6 Oldsmobile Cutlass Supreme Pages 6D4 - 3, 4, 5 Buick Regal Pages 6D4 - 3, 4, 6

Chevrolet Cavalier Pages 6A3 - 19 Pages 6D4 - 3

Chevrolet Camaro Pages 6A2 - 30 Pages 6D4 - 7, 8

Pontiac Firebird Pages 6A2 - 30 Pages 6D4 - 7, 8

Chevrolet Corsica/Beretta Pages 6A5 - 20 Pages 6D4 - 2

Chevrolet Lumina (APV) Pages 6A4 - 17, 41 and 6D4 - 6 Pontiac Transport Pages 6A4 - 17, 41 and 6D4 - 6 Oldsmobile Silhouette Pages 6A4 - 17, 41 and 6D4 - 6

1989 Pontiac 6000 Pages 6A4 - 14, 23

1988 Pontiac 6000 STE and Supplement Pages 6A5 - 16, 23

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.