For 1990-2009 cars

# OIL PRESSURE GAGE READS HIGH FLUTTERS (REPL. SENSOR)

#### SUBJECT: OIL PRESSURE GAGE FLUTTERS, OR MAY READ HIGH (REPLACE SENSOR)

#### MODELS AFFECTED: 1990-91 REGALS WITH GAGES (OPTION UB3 OR U21) 1991 ROADMASTER ESTATE WAGONS -----------------------------------------------------------------------------

#### CONDITION:

---------- On vehicles with gages, the oil pressure gage may flutter, or may show unusually high oil pressure (full scale).

#### CAUSE:

------ The internal resistance wire in the sensor may not be properly supported, resulting in an intermittent open condition.

#### CORRECTION:

----------- Check for normal causes of high oil pressure gage readings (high resistance or open circuit), such as a poor ground path caused by loose sensor mounting, oil cooler adapter loose, or poor electrical connections. If no cause can be found, replace the oil pressure sensor with the correct new part number listed below.

#### WARRANTY INFORMATION:

Use existing labor operation N2220.

#### NEW OIL PRESSURE SENSOR PART NUMBERS

1991 Roadmaster Estate Wagon 10205411 1990 Regal with 3.lL V6 Engine (VIN Code T) 10205410 1991 Regal with 3.lL V6 Engine (VIN Code T) 10205676 1990-91 Regal with 3800 V6 Engine (VIN Code L) 25605389

Parts are currently available from GMSPO.

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.