CRANKCASE VENT HEATER SHORTED (REPLACE VENT HEATER)

SUBJECT: CRANKCASE VENT HEATER POTENTIAL SERVICE ISSUES (DIAGNOSE/REPLACE CRANKCASE VENT HEATER ASSEMBLY)

VEHICLES AFFECTED: 1992 "L, N" CARS WITH 2.3L ENGINE (VIN A, D, 3) CHEVROLET CORSICA, BERETTA PONTIAC GRAND AM OLDSMOBILE ACHIEVA BUICK SKYLARK

CONDITION:

---------- Several conditions may occur depending on car line. The "N" car may have an ABS light on, no HTR-A/C or Daytime Running Lights (HTR-A/C fuse blown). The "L" car may have an ABS light on (Fuse #4 blown). Service conditions are not limited to the examples given above; refer to the bulletins referenced below and Section 8A in the respective Service Manual for additional systems which may be affected.

CAUSE:

------ The crankcase vent heater assembly may have shorted out.

CORRECTION:

----------- Replace the crankcase vent heater assembly if assembly has shorted out (GM P/N 24572353 Heater, Crankcase Vent).

SERVICE INFORMATION:

Review Section 6E3-C13 (Service Manual Update Bulletin 92-6E3-016) and Section 8A (Service Manual Update Bulletin 92-8A-025) to determine if crankcase vent heater has shorted out. Replace the crankcase vent heater as needed.

Section 8A-32 in the Service Manual is the wiring schematic information for the crankcase vent heater assembly.

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.