Instruments - Cluster Resets When Ham Radio Is Keyed

File In Section: 6E - Engine Fuel & Emission

Bulletin No.: 77-65-29

Date: November, 1997

Subject:
Instrument Cluster Resets when On-board Ham Radio is Keyed
(Replace the PCM)

Models:
1997 Buick Century, Regal
1997 Chevrolet Malibu
1997 Oldsmobile Cutlass
with 310013800 V6 Engine (VINs M, K, 1 - RPOs L82, L36, L67)

Condition
Some vehicles may experience an instrument cluster reset if the vehicle has an on-board Ham radio operating under the 10 MHz frequency range and the transmitter is keyed on.

Correction
A new PCM has been released to correct this condition. The new PCM has a 47 Micro Henry choke in place to eliminate the interference generated by the on-board Ham radio equipment.

Do not forget to transfer the Knock Sensor Module from the old PCM into the new PCM.

Parts Information





Parts are currently available from GMSPO.

Warranty Information
For vehicles repaired under warranty, use:

Labor Code Labor Time
J6360 PCM, Replace Use Published Labor
Operation Time