Mechanics

THERMOSTAT

2004 GMC Yukon • V8 4WD Automatic • 99,000 miles

Defective thermostat how do I replace
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Boblinfortino
January 23, 2011.




THERMOSTAT REPLACEMENT (8.1L ENGINE)

Removal Procedure

Fig. 125: View Of Inlet Hose Clamp & Water Crossover
Courtesy of GENERAL MOTORS CORP.
1. Drain the cooling system. Refer to Draining and Filling Cooling System.
2. Reposition the inlet hose clamp at the water outlet.
3. Remove the inlet hose from the water outlet.
Fig. 126: View Of Water Outlet, Bolts & Thermostat
Courtesy of GENERAL MOTORS CORP.
4. Remove the water outlet bolts (2).
5. Remove the water outlet (1).
6. Remove the thermostat (3).
Installation Procedure

Fig. 127: View Of Water Outlet, Bolts & Thermostat
Courtesy of GENERAL MOTORS CORP.
1. Install the thermostat (3).
2. Install the water outlet (1).
3. Install the water outlet bolts (2).
Tighten: Tighten the bolts to 30 N.M (22 lb ft).
Fig. 128: View Of Inlet Hose Clamp & Water Crossover
Courtesy of GENERAL MOTORS CORP.
4. Install the inlet hose to the water outlet.
5. Position the inlet hose clamp at the water outlet.
6. Fill the cooling system. Refer to Draining and Filling Cooling System.
NOTE: Refer to Fastener Notice in Cautions and Notices.


Merlin2021
Jan 23, 2011.


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