1999 GMC Sonoma "loud vaccume" Questions

no 4wd. on 1999 gmc sonoma 4wd does not engage when put in 4wd hi or lo,switch lights up and i can hear loud clicking under vehicle sounds like a vaccum hose is off

2002 Chevy TrailBlazer Service Engine light is on. The car gives off a loud wind sound when pressing the accelerator. The engine runs smooth but less power. you have a vaccum leak, or a vaccum line ...

Vaccum line diagram 2001 chevy impala 3800 v6 Gas smell when running engine loud noise, stalls at traffic stops ...

...on pass fender that has vaccum lines and an electric plug to it and when i turn the key on i get a loud buzzing noise what is it electronic vaccum

...Laredo 4.0 Straight 6 and when you turn it on it will idle extremely high, also there's a loud ticking/knocking noise coming from under the hood and cannot figure out what it is...no codes ...

89 gmc no reverse/ no drive really loud noise sounds like the gears are trying to catch but loud grinding i believe it might be a vaccum i had a similar problem

there is a loud loud vaccum like sound when i press on the gas where is the noise coming from Duplicate question.

there is a loud loud vaccum like sound it like something is dragging on the groundwhen i press on the gas where is the noise coming from Have it put up on a car lift and look at the problem is my best

...the car and give in gas to pass another car one of the vaccum hoses pop off. and the car makes a loud noise like a air compressor line has been cut when I give it gas now.. no idea as to make or ...

what is the cause of a very loud whistle sound when engine speed is very high? when engine is stationary, but during acceleration the loud whistle noise comes on Leaking Vaccum Line or the intake ...