Avalanche 1500 2WD V8-5.3L (2008)
1. If reusing the old coolant heater, apply thread sealant GM P/N 12346004 (Canadian P/N 10953480), or equivalent to the threads.
Notice: Refer to Fastener Notice .
2. Install the coolant heater to the engine block.
Tighten the coolant heater to 50 N.m (37 lb ft).
3. Connect the coolant heater cord electrical connector.