After doing some additional reseach, I found that the cut off point for the low side switch should be 25 lbs. Since mine is cutting off at 30 lbs, I'll replace it and report back.

Thanks for the advice and feedback.

Wow. First, no jumpering is allowed. You can do damage. Check to see if there is a cabin air filter, if so change it. Adding refrigerant Willy nilly is a no-no. And I fear you used one of those so called death kits from the parts stores which contain sealer, which is a mistake, it can clog your sys...

I think I'm a little overcharged at this point but the high side is only 10-20 psi high . It still cut out at highway speeds. I jumpered the low pressure switch and now it cools properly at highway speeds. You mean 10-20psi higher than where you think it should be? Jumping a switch except for testi...

I have a 2003 Chevy Silverado 1500HD. At highway speeds it does not cool as well as it does around town. When checking the pressures, they seemed fine, but I could get the compressor to cycle by bringing the RPMs up to 2000 RPM and spraying the condenser with water. Thinking the low pressure switch ...