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Corrosion At Ignition Coil Towers on Buick Rendezvous

Problem Description and Possible Solution

Corrosion may develop at the connection between the ignition coil tower and spark plug wire resulting in an engine misfire. The Ignition coil and spark plug wire should both be replaced to correct this condition.

Problem Data
RepairPal Verified
Average mileage: 156,108 (156,108–156,108)
Engines affected: 3.4L V6, 3.6L V6
4 model years affected: 2002, 2003, 2004, 2005
6 people reported this problem
Viewing 1 - 2 of 2 comments
found oxidation where coils mount. cleaned with wire brush and installed new coils with anti-sieze. used di electric grease inside spark plug boot and harness connection. coil 1/5 both tested high for resistance.
AWD disabled light is on and now the transmission seems to hesitate to shift