Drivers of 2006-08 Buick Lucerne models with 3.8-liter V6 engines may come into your store complaining of a buzzing noise and/or vibration from the brake and accelerator pedals.
One likely cause for the trouble, GM said, is normal vibrations from the engine being transmitted through the fuel lines which, more often than not, are contacting the upper portion of the brake booster.
The only reliable fix is to install a new-design fuel feed and evaporative emission pipe assembly, part No. 25978188. The new pipe assembly routes the fuel lines underneath the booster, out of harms way.
"Factory Fixes" is written by Jim DePalma, a 30-year veteran of the auto repair business who has served stints as a service manager, parts manager and ASE-certified technician. His column provides vehicle manufacturers' authentic factory technical service bulletins (TSBs) that have been condensed for easier reading. Mr. DePalma advises that techs always check with a dealer or repair information system for the latest revisions before starting to work on a vehicle. He can be reached via e-mail at [email protected].