Envoy 4WD V8-5.3L (2007)
Engine Block Heater: Service and Repair
Coolant Heater Replacement (LL8)
Coolant Heater Replacement (LL8)
Removal Procedure
1. Drain the engine coolant. Refer to Draining and Filling Cooling System (LL8) Draining and Filling Cooling System (LH6, LS2).
2. Remove the powertrain control module (PCM) retaining bolts (3) and nuts (6).
3. Remove the PCM mounting studs (5) and position the PCM out of the way.
4. Disconnect the engine coolant temperature (ECT) sensor electrical connector (1).
Notice: Refer to Fuel and Evaporative Emission Hose/Pipe Connection Cleaning Notice.