1991 GMC Vandura 2500 Questions

Unanswered 1991 GMC Vandura 2500 Questions

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engine starts, runs rough, cuts out, will not run with out pumping gas pedal.
I have given her a full tune up now it runs but besides the surging idle witch was the start of the problme but also when you give her gas it tryes to stall untill you get to hi rpms
The heater and A/C does not work at all. When we were using the A/C it was only working up front - the rear would not work at all. Now that it's freezing outside, the heater stopped working as well. When you turn it o...