When I press my brakes the truck idles up
and then starts running like crap and u can
hear air blowing while ur foot is on the
brake is that a vacume leak or what?
Yes check all your vacuum hoses from the master cylinder to the motor
(The brake booster)
You going to need a brake booster. If it looks like the rear of the master cylinder has been leaking into it the you'll need that too
Looking for a Used C/K 1500 in your area?
CarGurus has 906 nationwide C/K 1500 listings starting at $2,500.
Search Chevrolet C/K 1500 Questions
Chevrolet C/K 1500 Experts