2005 GMC Envoy "vacuum actuator switch" Questions

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...vacuum actuator (not sure why they call it a vacuum actuator because it is an electric actuator). It is under the dash on the driver's side close to the radio. There are two in the same area. It is ...

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...actuator switch, the vacuum switch, hub assembly, and the electronic 4wd dash switch. Could be a bad dash switch but Envoy's and Chevy Trailblazers are notorious for bad 4wd actuators, which are ...

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Question about GMC Envoy

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...vacuum, you may have a faulty actuator (under the battery i believe), or cable from the actuator to the front diff. also, vacuum systems have switches on the transfer case that can fail causing the ...

...vacuum switch located elsewhere This not a fuse problem. When you switch to A4WD or 4HI, do the indicator light for those positions stay on solid or do they blink and then return to 2HI position? If ...

...actuator doors are typically controlled by a vacuum switch. either: - the lines have split or become disconnected (not common) - the lines have dirt in them (more common) - the vacuum switch has ...

...actuator that engages the front different cause while in 4x4 and front tires off the ground. If I spin one of the front tires...the other side doesn't do anything. When I bought it used. The guy ...

Question about GMC Envoy

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...vacuum motor or air flow position selector switch, and/or a faulty Blend Door Actuator. If you have been driving around with the Temperature knob or control set at the same spot for months, move it ...

Question about GMC Envoy

1 Answer

a few minutes. If this does not make your AC work again, you may have a problem with one of the blend doors or its actuator motor. BTW, there is no vacuum operating the HVAC system, it is all electric

...vacuum actuator under the battery box this is what engages the front definitional there is a vacuum switch in the top of the transfer case when you move the shifter into 4wd there is a lever inside ...

...vacuum actuator should move by hand without vacuum applied. You should also be able to see it move if you have someone switch the transfer case into 4hi/lo from 2wd and then back again. There is a ...

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