On certain sport utility vehicles, contamination on ignition relay contacts can cause high resistance. This can affect signals to the powertrain control module and, could cause intermittent vehicle stalls at any time.
Dealers will replace the ignition relay free of charge. The recall began on May 4, 2005. Owners may contact Pontiac at 1-800-620-7668 and Buick at 1-866-608-8080.