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

SUBJECT SERVICE MANUAL UPDATE - SPARK PLUG TORQUE (SPECIFICATION CHANGED)

MODELS/YEARS 1988-89 CUTLASS CIERA/CUTLASS CRUISER, 1988-91 CUTLASS SUPREME AND 1990-91 SILHOUETTE MODELS

When installing spark plugs in the 3.1 L engine, use the following revised specification.

Cast Iron or Aluminum Heads, 15 N.m (1 1 Lb. Ft.)

Mark a reference to this bulletin in your copy of the following service manuals:

1991 Cutlass Supreme Pages 6D4 - 4, 5, 7

Silhouette Pages 6A4 - 20, 46 and 6D4 - 6

1990 Cutlass Supreme Pages 6D4 - 3, 4, 5

Silhouette Pages 6A4 - 17, 41 and 6D4 - 6

1989 Cutlass Supreme Pages 6A5-16 & 26 and 6D4-4

Cutlass Ciera/Cutlass Cruiser Pages 6A4-14 & 23

1988 Cutlass Supreme Pages 6A3-16 & 26 and 6D4-3

Cutlass Ciera/Cutlass Cruiser Pages 6A4-16 & 12

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.