This replacement engine coolant thermostat housing is engineered to match the fit and durability of the stock thermostat housing on specified vehicles. It is designed to withstand extreme temperature changes to extend service life. Vehicle model years this part fits (be sure to check your vehicle trim using the Amazon garage) - [Buick Allure: 2005, 2006, 2007, 2008, 2009] - [Buick LaCrosse: 2005, 2006, 2007, 2008, 2009] - [Buick LeSabre: 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005] - [Buick Lucerne: 2006, 2007, 2008] - [Buick Park Avenue: 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005] - [Buick Regal: 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004] - [Buick Riviera: 1995, 1996, 1997, 1998, 1999] - [Chevrolet Impala: 2000, 2001, 2002, 2003, 2004, 2005] - [Chevrolet Lumina: 1998, 1999] - [Chevrolet Monte Carlo: 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005] - [Oldsmobile 88: 1995, 1996, 1997, 1998, 1999] - [Oldsmobile 98: 1995, 1996] - [Oldsmobile Intrigue: 1998, 1999] - [Oldsmobile LSS: 1996, 1997, 1998, 1999] - [Oldsmobile Regency: 1997, 1998] - [Pontiac Bonneville: 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005] - [Pontiac Grand Prix: 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008]