Envoy 2WD L6-4.2L (2008)
Notice: Refer to Fuel and Evaporative Emission Hose/Pipe Connection Cleaning Notice .
5. Disconnect the fuel feed (1) and fuel return (2) pipes from the fuel rail. Refer to Metal Collar Quick Connect Fitting Service .
6. Disconnect the integral clip (3) from the wire harness bracket.
7. Remove the engine wire harness bracket bolt.
8. Position the engine electrical wire harness bracket with wires attached out of the way.
9. Remove the coolant heater cord from the heater (2).
Important: Do not score the surface of the engine block hole when removing the coolant heater.
10. Remove the coolant heater from the block.
Installation Procedure
1. Remove any burrs, sealer, paint or other foreign material from the threads/sealing surface of the engine block and from the old coolant heater if the
heater is to be reused.
2. If reusing the old coolant heater, apply thread sealant GM P/N 12346004 (Canadian P/N 10953480), or equivalent to the threads.
