CHUGGLE - (NEW CALIBRATION PROMS)

Subject: CHUGGLE (NEW CALIBRATION PROMS)

Model and Year: 1992-93 CAPRICE WITH 5.7L ENGINE (RPO L05 - VIN 7) AND AUTOMATIC TRANSMISSION

CONDITION:

--------- Some owners with vehicles listed below, equipped with 5.7L V8 engines (L05, VIN 7), may comment about a "chuggle" condition.

This bulletin addresses the following vehicle/condition problems ONLY:

BODY YEARS CONDITION ---- ----- --------- Wagon 1992-93 Chuggle with base axle only RPO GU2, 2.73 ratio

CAUSE:

----- Insufficient dampening of the torque converter and PROM calibration.

CORRECTION:

---------- New calibration PROMS have been released to address the above vehicle/condition problems.

The following PROMS are NOT RECOMMENDED for vehicles with OPTIONAL AXLE RATIOS or TRAILER TOWING PACKAGES.

Vehicles produced from mid-June 1993 through the end of the model year are expected to have this PROM change. Check PROM Scan ID.

EMISSION SERVICE SCAN BROADCAST SYSTEM YEARS AXLE RATIO/BODY PROM P/N ID CODE -------- ----- --------------- -------- ---- --------- Federal 92-93 2.73 (GU2)/Wagon 16195067 5131 BHHP (NA5) California 93 2.73 (GU2)/Wagon 16195072 5141 BHHR

PLEASE NOTE: The above vehicles produced before December 16, 1991 (Julian Date 350) may have Hydra-matic 4L60 Model 2DDM Transmissions. Model 2DDM Transmissions may contain torque converters with insufficient dampening.

Vehicles with Model 2DDM Transmission - Check dealer records to see if the torque converter has already been replaced with P/N 8650935 (Tagged B/C: DGAF). It is not necessary to replace those torque converters with P/N 8650935.

Transmissions with torque converters with P/N 8656959 (Tagged B/C: DG5F) need to have the torque converter replaced with P/N 8650935.

Model 2BRM transmissions (produced after December 16, 1991) have the new torque converter.

Parts are currently available from GMSPO.

WARRANTY INFORMATION:

DESCRIPTION LABOR OP TIME ----------- -------- ---- Replace PROM T0500 0.6 hour Replace Torque Converter K7020 *

*Use applicable labor time guide for labor 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.