Silverado 1500 No coolant Temp, Says Engine Hot AC Off 

Yeah sometimes manufacturers parts are the way togo. Thermostats always go for manufacturers part ive learned that if you don't want to change it every year or two lol

I went to the ac delco site to go ahead and order a thermostat and it’s saying it’s not compatible with my v6 4.3 Silverado. I’m confused on why’d it’d be saying this

I'll never sell her either 😆

Thanks for the support bro!

So you have a different problem that sucks. Mine was easy just replaced thermostat it was stuck shut. Still no issues since. Many different parts can cause this issue. Mine was the thermostat. With it stuck shut coolant can't pass the coolant sensor. If these vehicles cannot detect its engine temp it will throw engine hot a/c off message, even if its not actually overheating.

Wasn't a bad temp sensor, was a stuck thermostat which will cause overheating. By not opening and allowing the coolant to flow. Truck has no temp since coolant isn't flowing past the sensor. Its better to proper diagnosis then assume and throw parts at a problem. Yes seeing no temp would lead one to believe its the sensor. But if you touch a rad hose and ones hot but ones cold and feels empty then its a coolant/flow issue.

No stuck thermostat, drove it for an hour temp skyrocketed. Easy to figure out a stuck thermostat hot hose coming from rad to engine, cold hose going from engine to rad means coolant isn't flowing. The only thing that prevents coolant flow is the thermostat on this truck. And you can drive it for awhile to clear the code or just disconnect battery for instant code removal. Temp sensor functioned to spec, they truck was actually overheating from a defective thermostat.

Cheapest thing to try is replace radiator cap my 95 dodge had same issue, for me replacing the cap solved my problem.

Check sensor wire harness make sure its not shorting out somewhere, as for thermostats be sure to clean and flush cooling system as debri can cause premature failure. Also they just don't make them as reliable anymore lol.

Were you able to fix your issue? I just replaced my temp sensor and thermostat, and the problem returned a few miles down the road. Any suggestions?

You replaced Temp sensor?

Wrong It never happened again cause it was the thermostat that was stuck shut. Not hard to figure out if one rad hose is burning hot and ones cold to the touch and your engine is overheating its a stuck thermostat or water pump failure. A bad temp sensor would show overheating but coolant would still flow both hoses would be hot and engine wouldn't actually be overheating. After either repair you'll need to disconnect battery on these models to clear the code.

Could be a few things to check, are the fans kicking on and off (fan motor/relay), water pump should have a weep hole if thats leaking then pump is shot. I'd check those first. There's also a chance the thermostat is stuck partially open allowing some flow but not enough to keep engine cool. Older thermostats had a bypass hole so if they ever get stuck shut some coolant could flow but im pretty sure these newer vehicles don't have them.

Again?? What brand did you use and how long did it take?

@@strapped_6159 That was the 3rd (?) time ive replaced it. 150k miles, had it since 10k

Unfortunately truck got totaled a year later but was still running strong engine wise on back of wrecker lol

@@seanpaula8924 unfortunately t-stats are made very cheap now

@@strapped_6159 30 mins or less its very easy on this model. I unfortunately cannot remember the brand

No but the truck got wrecked 8 months later sadly.

This one is a 2011

For me it wasn't a sensor but thermostat got stuck shut. Replaced that disconnect batter for a minute then it fired up with no more codes