GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2007 🢒 Monte Carlo 🢒 Bulletins 🢒 Cylinder Head Gasket Replacement - keywords 3.5 3.9 air coolant knock hot LZE LZ4 LZ8 LZ9 leak misfire noise overflow overheat rattle

Cylinder Head Gasket Replacement - keywords 3.5 3.9 air coolant knock hot LZE LZ4 LZ8 LZ9 leak misfire noise overflow overheat rattle

Subject:Cylinder Head Gasket Replacement

Models:2006-2007 Chevrolet Impala, Monte Carlo, Uplander, Malibu
2006-2007 Pontiac G6, Montana SV6
2006-2007 Buick Terraza
2006-2007 Saturn Relay
Equipped with 3.5L (LZ4 / LZE) or 3.9L (LZ9 / LZ8 LCG) engines


The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

Condition/Concern:

If the dealer has diagnosed a vehicle as needing one or both cylinder head gaskets replaced follow the recommendations below.

Recommendation/Instructions:

Metro Detroit Dealers Only:

Engineering is currently looking for vehicles in the "Metro Detroit" (Southeast Michigan) area that have been diagnosed as needing one or both cylinder head gaskets replaced. Dealers in the "Metro Detroit" area that have a vehicle that requires a head gasket(s) be replaced should contact Jim Kelly at (586) 492-5612 before performing any disassembly. He will assist in making arrangements for Engineering to review the vehicle at your Metro Detroit area location.

Important: Engineering is only interested in engines where the cylinder head bolts have NOT been loosened or disturbed. If the cylinder head bolts have already been loosened or disturbed, then do NOT contact Jim Kelly. Proceed with your repairs as normal.

Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.