Sing tahoe z71 2001

Good mechanical friends, my consultation is as follows, I have a Chevrolet Tahoe Z71 of the year 2001, everything works well, my problem is that when the engine is working at least with the air conditioning on, the revolutions fall from 500, which is why the air compressor stops cooling, so I must keep it accelerated to cool. The sensors and acceleration valves, spark plugs, cables, what I would like to know is whether in these Vortec engines, we can graduate the minimum in some way (or as the computer handle the computer), as a friend told me I must clean a sensor of minimum, which I do not think it works.

I will know how to thank your help.

Greetings

Is it a vortec v8? Bencinero?

Thank you for answering Kikemec, the engine is a Vortec 5300 V8 SFI, gasoline.

Thanks again

You know in an ocation I had a similar problem with a C1500 and the problem was in the load of the Alternator Checalo Quisas is the same, you have noticed if when you turn on the lights the revolutions go down a lot?