It may seem simple to many but with the development of the ob2 scanner i have never hooked up a Vacuum gauge. I am looking for detailed instructions on hooking a Vacuum gauge to a 1996 4.3 blazer with a throttle body.

 

Is this for a one time test or are you mounting one. I guess you would tap
at the brake booster line. If your mounting a gage instructions should come with it.

You throwing a MAP code, surging or something?