Having problems with your 2000 GMC Sierra ?
2004 GMC Sierra 5.3L engine. Using excessive coolant; no external leaks. Passed compression test. Intake gaskets replaced. Residue found inside the intake and heads from burnt coolant. Suspect it may be a leaking throttle body. Please confirm.
I was going to say water pump but no block the water inlet to throttle body and let run a while can you smell a sweet smell or steam comming from your tail pipe Next is a die test you can do . Put the die in your rad and go for a 5 mile ride now use a cheep black lite $3.00 at lowes the leak will show up. good luck CJ
Repair Help & Product Troubleshooting for 2000 GMC Sierra
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