FUEL GAGE READS INCORRECTLY POSSIBLE CAUSES AND CORRECTION

FUEL GAUGE READS INCORRECTLY

VEHICLES AFFECTED: 1987 "L" CARS WITH 2.8L M.P.F.I. ENGINE ------------------ (RPO LB6)

Comments regarding 19-34 litres (5-9 gallons) of fuel remaining in the fuel tank when the fuel gauge reads empty have been received on some early built 1987 2.8L MPFI (LB6) equipped Corsicas with RPO U21 (gauge package) and Berettas with base gauge package.

These comments may be attributable in part to operator inability to accurately interpret fuel gauge reading due to gauge graphics and usage of a short gauge pointer (Figure 1), and/or an inaccurate fuel tank sending unit.

Vehicles that have been noted as exhibiting this concern may be repaired by following the steps below and applicable shop manual procedures.

1. Direct gauge cluster assembly to authorized A.C. Delco Service Center for pointer replacement (longer pointer) and recalibration (Ref. A.C. Delco Service Bulletin 87-CH-L-01).

2. Install fuel tank sender assembly, P/N 25091401, that incorporates usage of a new float that reduces empty reserve to one gallon on 2.8L M.P.F.I. (RPO LB6) engines.

Use applicable Labour Operations and times.

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.