LOW OIL PRESSURE READING INCORRECT OIL PRESS. SENDER

MODELS: 1987 RN, G, P AND 1988 C/K WITH LB4 (VIN CODE Z), L03 (VIN CODE H), L05 (VIN CODE K), L19 (VIN CODE N) TBI ENGINES

Some 1987 R/V, G, P and 1988 C/K models with 4.3L, 5.0L, 5.7L and 7.4L engines with throttle body injection may have a low oil pressure reading at the gage. This condition may be caused by an incorrect oil pressure sender being installed in production.

If this condition is encountered, it can be repaired by using a new oil pressure sender, P/N 10069218. The new design sender can be identified by a "60" that is stamped on the hex drive portion of the sender. For installation instructions, refer to the service procedure in Section 8C of the appropriate service manual.

This condition was corrected in production beginning with the following VIN breakpoints:

1987 R/V -------- Flint Line 1 GMC HF718914 Chevrolet HF368115

Line 2 GMC HF517180 Chevrolet HF136663

Janesville GMC HJ515257 Chevrolet HJI39069

St. Louis GMC HS515905 Chevrolet HS145384

1987 G Van

Lordstown GMC 513772 Chevrolet 143213

Scarborough GMC 509369 Chevrolet 119458

1987 P Chassis

Detroit GMC H3503077 Chevrolet H3315178

1988 C/K -------- Pontiac GMC JE501049 Chevrolet JE103403

Ft Wayne GMC JZ500061 Chevrolet JZ103371

Oshawa GMC J1503576 Chevrolet J1110750

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.