It is more likely to be the cooling system in the car. check you thermostat and coolant temperature. the coolant "DEXCOOL" tends to form sludge inside the cooling system(heater core). it may be clothed up.
The 2005 Buick LaCrosse has a V6 engine.
The 2005 Buick LaCrosse has 12 valves.
The 2005 Buick LaCrosse has overhead valves (OHV).
The 2005 Buick LaCrosse has a 4-speed automatic.
The 2005 Buick LaCrosse is a gas-powered vehicle.
The 2005 Buick LaCrosse runs on regular unleaded.
The curb weight of the 2005 Buick LaCrosse is 3495 lbs..
The 2005 Buick LaCrosse's turning circle is 40.4 ft..
The height of the 2005 Buick LaCrosse is 4 ft. 9.4 in. (57.4 in.).
The 2005 Buick LaCrosse is 16 ft. 6.1 in. (198.1 in.) long.
The 2005 Buick LaCrosse has 37.6 in. of rear leg room.
The 2005 Buick LaCrosse has 37.2 in. of rear head room.