Question about GMC Cars & Trucks
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Posted on Jan 02, 2017
There is a Vaccum diagram in that manuel.
make sure you are looking at the correct engine diagram
You mostlikely have the A20A3 or A4 that is the diagrams you should be looking at.
Posted on Nov 03, 2008
SOURCE: I need a vacuum line
thanks fasteddie383, i had already checked with the library (actually, i've checked three different LARGE libraries, no luck!) i've even had two different friend's that i went to school with check around @ the two GM dealership's where they work-one's the service manager, the other's the shop foreman-no luck! i thought about looking @ those sites that charge a fee for a year's worth of access, but they have no guarentee i can find what i'm looking for, and no refunds.
as for our "guest" on Jan.02........"i have a 86 2.5 liter , i dont know the vacuum routing and i with i knew where fuel pump prime wire terminates within the vehicle. "????? what the hell?......first you're talking about a 2.5 (4 cylinder) that's in (eithier) a S-series Blazer/Jimmy, or p/u............did you not see that it's for a Suburban with a 350. different truck and different engine equals different diagram, but thanks anyways.
Posted on Feb 26, 2009
it may not be a vacumn leak from a line,check the throttle shaft for movement,for example,i had a 89 1 ton 350 and my throttle shaft was moving around a lot and in order to keep it from idling high,i had to kick the throttle pedal.But also check the idle air control valve,which is the round sensor on the side of the throttle body.
Posted on Sep 11, 2009
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