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Re: Could my AC be overheating my truck?
You can also give it a "flick" when it's hot. It should barely move. You should be able to notice it moves much easier when flicked "cold".
I have a 195 Thermostat in my truck. It was 96* here on saturday. I had the A/C cranked on high for an hour+ on the interstate and in traffic. My truck will run 200-205 on the interstate when it's that hot out and about the same in traffic, it might get close to 210, but it will come back down, go up, back down, etc. I also have a 700R4 adding heat to the radiator.
I have mine set up with all GM stuff too, with a 4 row radiator and correct clutch fan and shroud.
I don't know much about the larger GM engines, but I seem to recall they all ran a little on the warm side (hence the giant radiator you always see in BB vehicles)?
215-220 should be safe enough range to let the truck get hot. I'd verify that it really is going past the 210 mark before freaking out and swapping parts.
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