The vacuum hose on a 1994 GMC Safari is connected to the intake manifold. This is located to the left of the throttle body.
You can find a complete vacuum hose diagram for your 1994 GMC Safari van in a Chilton or Haynes automobile repair manual. These manuals can be found at most local libraries or purchased at automobile parts stores. These companies also have online resources available for certain make and model vehicles.
You have a broken vacuum hose under the hood that supplies the switch.
yes , you can
Vacuum hose diagram 1988 gmc s15 2.5
To fix a loose vacuum hose on a 2002 GMC Envoy, it can be clamped with a small hose clamp. Use a metal clamp that can be adjusted to fit the small hose.
In a 1998 GMC Safari, the vacuum supply to the AC control assembly typically comes from the engine's intake manifold. The vacuum hose is usually routed through the firewall, connecting to the AC control panel inside the vehicle. Check for any cracks or disconnections in the vacuum lines, as these can affect AC operation. If you're having issues, inspecting these components is a good first step.
Why would you want to do this?
There are more than 14 vacuum lines on the 1997 GMC. Most of the vacuum lines originate from the air intake system or the transmission.
When making any changes to a car, it is important to have a diagram for a guide. A diagram for a 1987 GMC Jimmy vacuum hose system can be found in its manual.
The vacuum switches for the AC vents on a 1995 GMC Safari all-wheel drive van are located underneath the dashboard. The vacuum lines are also located underneath the dashboard.
1994 and up 134a
Most likely this is due to a broken vacuum line under the hood. Probably not a rubber hose, but a plastic tube that had dried out and cracked. Mine just crumbled apart and I replaced it all with a hose.