someotherguy
Truly Awesome
'88 shouldn't have a mechanical speedometer; GMT400's are electronic. Is your truck a squarebody? You referred to it as a K1500 but I know some people are a little loose with the terminology. A K1500 would be in the GMT400 family. (Regardless, under 60K is still amazingly low miles for any vehicle of this age!)
Sounds like you're onto something with the idle screw as this is an area that the overwhelming majority of people should have never needed to adjust, and it's easy to get it wrong if you go in there turning it blindly.
Richard
Sounds like you're onto something with the idle screw as this is an area that the overwhelming majority of people should have never needed to adjust, and it's easy to get it wrong if you go in there turning it blindly.
Richard