For 1990-2009 cars

# CHANGE OIL LIGHT REMAINS ILLUMINATED AFTER RESET (PROM)

#### SUBJECT: CHANGE OIL LIGHT REMAINS ILLUMINATED AFTER RESET (CHANGE PROM)

#### VEHICLES AFFECTED: 1993 "D" MODELS WITH 6.7L ENGINE (RPO LOS - VIN 7)

#### CONDITION:

--------- "Change Oil" lights on some 1993 model year Fleetwood vehicles (D Cars) equipped with 5.7L (L05, VIN 7) V8 engines may remain on (illuminated) although the reset procedure is followed.

#### CAUSE:

----- The throttle position sensor (TPS) parameter may be set too high.

#### CORRECTION:

---------- New PROMS have been released to address this condition. This bulletin covers all vehicles built through April 1993. Check scan I.D. before replacement.

Use the following chart to determine appropriate PROM replacement for vehicles with the above outlined condition.

Emission Axle Ratio and/or Service Scan Broadcast System Other Options PROM P/N ID Code -------- ----------------- -------- ---- --------- Federal (NA5) 2.56 (GM8)/3.08 (GU4) 16193871 3741 BFYU Leaded Fuel (NM8) Without Armored Body 16193876 3751 BFYW Federal (NA5) 3.73 (GT4) 16193882 3761 BFYX California (NB2) 2.56 (GM8)/3.08 (GU4) 16193886 3771 BFYY California (NB2) 3.73 (GT4) 16193919 3781 BFYZ Federal (NA5) Coach (7200 lbs (V1U) 16193889 3791 BFZA Conv./Hearse (B9Q) California (NB2) Coach (7200 lbs (V4U) 16193923 3801 BFZB

For vehicles repaired under warranty use:

Labour Time: 0.5 Hours

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.