Sierra 2500 4WD V8-6.6L DSL Turbo VIN 2 (2004)
Thermostat Housing: Service and Repair
Thermostat Housing Crossover Replacement (6.6L (LLY) Engine)
Removal Procedure
1. Remove the intake manifold cover.
2. Drain the cooling system.
3. Disconnect the negative battery cables.
4. Remove the upper fan shroud.
5. Remove the drive belt. Replacement in Engine Mechanical - 6.6L (LLY).
6. Disconnect the air conditioning (A/C) compressor clutch electrical connector (5).
7. Disconnect the A/C cut out switch electrical connector.
8. Remove the A/C compressor bolts.
9. Reposition the A/C compressor, with the hoses attached, to the right side of the engine compartment.
