Tahoe 2WD V8-5.3L (2007)
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.