Silverado overheating

redneckred
Sun, 28 Mar 2021 16:21:31 +0000
Maintenance/Repairs

I have a problem with my truck overheating if it sits at an idle or very slow speeds (5-10mph) for too long. I originally had problems with the Dash information center giving me a warning that the truck was overheating and AC was shut off, and the temp gauge reading flat or not registering at all. Did some research and found this may be contributed to a bad thermostat not letting the truck reach operating temperature. Changed the thermostat and knock on wood, no more errors. I still have the problem of overheating at an idle. I tried changing the temperature control sensor on the side of the block, but that did not resolve my issue. I have checked and found the fan coming on without turning the AC on, but now it doesn’t seem to want to do that. Once I turn the AC on, both fans come on and the temp gauge goes back down to normal. Do I have a bad relay or is the fan messed up and need to be replaced?

23 posts - 9 participants