LS2 V6-3.0L VIN R (2000)
Thermostat Housing: Service and Repair
IMPORTANT: During extremely cold weather, 10°F (-12°C) or colder, your engine's coolant temperature will decrease quickly when idling with the
heater fan on high speed and cool air may flow from the heater outlets. The fan control switch can be set at a slower speed position (fan speed I or II)
to maintain the hottest air flow.
REMOVAL
1. Drain coolant. (Refer to "Engine Coolant Check and Replacement".)
2. Remove intake plenum. (Refer to "Intake Plenum" removal.)
3. Remove intake manifold. (Refer to "Intake Manifold" removal.)
4. Remove radiator hose from inlet housing.
5. Remove thermostat extension housing bolt.
6. Remove and discard O-ring seals.