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I noticed that the high pressure schrader valve was hissing slightly..fixed that, disconnected battery, jumped the low pressure, reconnected battery, started vehicle and set air to high and dumped a...

Hi, I'm new to the forum but not to chevy trucks. I currently own a '91 that I bought when it was a year old so I have been driving it for 19 years. I just need a little help now and then figuring...

tried to bridge the low pressure switch, but no go...the compressor will not fire over...now what?

My air has always worked well but the compressor always made what i call a groaning noise when it operated and I could hear this inside the truck. I have owned this truck since it was a year old. ...

A friend of mine just got back from Autozone...They can't scan the OBD 1 vehicles anymore because their scanner doesn't work on them...ha ha...so I whipped out my scanner (paperclip) and did it for...