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My 2003 Silverado does not cool my truck when it gets to the upper 80's and higher. I have climate control. It doesn't cool, is the norm or should I have someone look at it?

You're probably just a bit low on refrigerant is all. Most places are going to check the system before they fill it so it's a win win but will cost a little more.

One thing you can do before taking it in is to check your cabin filters. If the system can't breathe, it can't cool either.

How many and were are these filters located?

There's 2, and they are under the dash near the glove box.

This should help you out...

How to Change a Chevy Tahoe Cabin Filter | eHow.com

A 2003 may not have them. I think they stopped in 2002.

Ahhhh ok and thanks Shamrock. I wasn't sure what year but thought it had them.

I look and there isn't any filters. I even took off the plastic shield off under the glove box and nothing. Any other help?