Covers U.S. and Canadian models of Buick LeSabre, Electra & Park Avenue - 1985 thru 2005, Pontiac Bonneville - 1985 thru 2005, Oldsmobile Eighty Eight, Delta 88, Royale, Ninety Eight, LSS and Regency - 1985 thru 2002, Front-wheel Drive. Does not cover diesel engine and related information, supercharger information, rear-wheel drive models or V8 models.