How do you replace the headlight bulb on a 1999 Oldsmobile Cutlass?
take the complete headlight assembly loose or out to get to the bulb.
Replacing a thermostat on a 1999 Oldsmobile Cutlass is very easy to do. First you will find the thermostat by following the upper radiator hose. It is under the exhaust crossover. The thermostat has two 13 mm bolts holding it in place. Take the bolts off to remove the thermostat and replace with a new one.