Exhaust - Boom Noise in Interior On Light Acceleration
Bulletin Number: 93-6-42AReference Number: 336603
Publish Date: 6/93
Subject:
"BOOM" NOISE IN PASSENGER COMPARTMENT ON LIGHT ACCELERATION (REPLACE MUFFLER)
Models Affected:
1992-93 BONNEVILLE MODELS WITH 3.8L (L27) ENGINE
THIS BULLETIN IS BEING REVISED TO CLARIFY THAT THE APPLICATION IS FOR 1992-93 PONTIAC BONNEVILLE SSE WITH 3.8L ENGINE (VIN L-RPO L27) MODELS. THIS BULLETIN CANCELS AND REPLACES BULLETIN 93-6-42 ISSUED 6/93. PLEASE DISCARD BULLETIN 93-6-42.
CONDITION:
Exhaust "lock-up boom" on light acceleration in fourth gear. The torque converter clutch in the transmission locks and a loud booming noise is heard in the passenger compartment. It will get progressively louder until clutch disengages.
CORRECTION:
A new muffler has been released to correct the above condition.
1992 model year vehicles use P/N 25609138 1993 model year vehicles use P/N 25620651
Parts are currently available from GMSPO.
WARRANTY INFORMATION:
Labor Operation Number: L2584