2000 5.3 overheating

[maynardtruckin]

Originally Posted by bbchevy

I know my 5.3 was a little clogged up from dexcool. There was just a bunch of restriction. I bought the best coolant flush I could and it actually made it stop. It used to overheat with the a/c on.

How is yours overheating. Under what conditions? How many miles are on the truck? Does the a/c have clogged fins in front of the radiator blocking air flow?

Does the temp just keep climbing when you start the truck of just spike when you least expect it? Or under a load? Only on a hot day?

-Scott
Posted via Mobile Device

It runs fine most of the time till you hook up a trailer and drive. trailer can be empty or full does not matter but if you start to clime even the slightest hill the temp starts to go up slowly but if you let off it cools down. It happens on cold and hot days. As for mileage it is 180,000. NO clogged fines on the ac, or radiator.