If there is a bleeder valve, it would be located at the top of thermostat housing
CHECK YOUR THERMOSTAT.... AND GOOD LUCK
add antifreeze
4 quarts or one gallon of pure antifreeze, mixed with an equal amount of distilled water, for a 50/50 mix.
The 2008 Buick LaCrosse has 12 valves.
The 2012 Buick Regal has 16 valves.
The 2012 Buick Enclave has 24 valves.
The 2014 Buick Enclave has 24 valves.
The 2014 Buick LaCrosse has 16 valves.
The 2001 Buick Regal has 12 valves.
The 2013 Buick Regal has 16 valves.
The 2003 Buick Regal has 12 valves.
The 2012 Buick LaCrosse has 16 valves.