would like a diagram of what it looks like
how do you replace a low side pressure switch for the ac on 2003 Chevrolet Silverado 3500
First tell us why you think it needs to be replaced, since you don't know what it looks like. This is a pretty reliable part. Wire connections is most of the problems i see. Might help more if you tell us a bit more! Just tring to help you FIX the problem.