Vehicle overheating

2004 GMC ENVOY
175,788 MILES • 2.1L • 4WD • AUTOMATIC
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325BIGTEX
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I replaced the old cap with a new one but still overheating. I noticed that it has a small leak on top. What's the best seal solution for this problem?
Feb 3, 2021 at 9:13 AM
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ASEMASTER6371
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Good afternoon,

Where is the leak coming from? I would pressure test the system first to determine the location.

https://www.2carpros.com/articles/engine-overheating-or-running-hot

https://www.2carpros.com/articles/radiator-pressure-test

It could be the thermostat causing the overheating. I would start there.

https://www.2carpros.com/articles/replace-thermostat

Roy

Thermostat Replacement (5.3L Engine)

Removal Procedure

Important: The thermostat is not serviceable separately. The water pump inlet and thermostat must be replaced as an assembly.


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1. Remove the radiator outlet hose.
2. Remove the water pump inlet bolts.
3. Remove the water pump inlet and thermostat from the water pump.
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Feb 3, 2021 at 1:04 PM