I have a 2004 Chevy Avalanche, when I drive with my AC on in stop and go traffic or in idle my engine will cut off. If I immediately try to restart my truck will cut off again, I have to let it sit for 15 minutes and then it will run normal again. I have no problems when AC is off. There is quite a bit of condensation underneath the truck when in park. Can the condensation be the cause of my truck cutting off?

 

It's unlikely that it's the cause, but WHERE under the truck is the condensation?

The ground is where it should be going.If not then check the A/C evaporator (chiller) drain. Sometimes they get plugged up and the water goes where it shouldn't.

If the A/C is enough to make the engine stall, then either the compressor is working way too hard, or the engine isn't running right.