2001 Pontiac Montana "vacuum" Questions

The blower is blowing air at the windshield only, no matter the setting. If actuators are vacuum controlled, if vacuum is lost, vehicle will usually default to defrost. Check vacuum source and control

...shift from floor to windshield You have a problem either in the control head, which is usually a vacuum issue, or under the dash in the blend box, which could be a vacuum or mechanical issue with ...

center cluster of vents on dash (right most vent of the cluster blows cold). Does this sound like a vacuum issue??? (i.e. the vacuum line that opens the AC trap/vent door got disconnected and probably

...ENTIRE vehicle in the best condition possible-- for the winter --reguardless of cost Sounds like a vacuum leak. These sorts of functions are often vacuum operated and a vacuum leak will cause it to ...

...about potentially replacing the heater core... On most late model vehicles, the heater controls are vacuum operated. It's possible that one of your vacuum lines has either come loose, or has cracked. ...

...to turn on. It could mean you have a defective air pump, bank1 or bank2 shutoff valve problem, a vacuum solenoid not turning on, a vacuum leak to the vacuum solenoid, incorrect/missing air ...

...EGR valve is, it's just behind the throttle body. Good luck and hope this helps.  Check for vacuum leaks on intake manifold, the air tube between the air filter. intake manifold vacuum hose.

...accumulator, and both front and rear expansion valves (front/rear air). Pumped down and held vacuum. When I started to install freon, both high and low sides together come up and peaked at ...

vacuum line leak My van is running rough at idle speed and at going speed, I think there's a vacuum leak. It could possibly be a vacuum leak, try replacing the Idle Air Control Valve about a $45 ...

...ca not change air flow from defrost to vents There is a actuator servo not working,check for a vacuum not connected,or broken,or sucked together,under the hood,look for a plastic vacuum line