Question about 2002 GMC Envoy
Would the repair of the actuator have anything to do with the transmission slipping, it has 220,000 miles on Envoy
When you actuator, I assume you mean the one for the front drive splined disconnect. This would not cause transmission slippage. With your mileage, the transmission is due for an overhaul.
Posted on Apr 20, 2014
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Posted on Jan 02, 2017
On top of the transfer case is a vacuum switch with 3 vacuum lines connected to it. This switch controls when vacuum is applied to the vacuum actuator. This switch can fail partly and allow fluid from the transfer case to be sucked up into the vacuum lines and anything connected to them as well. When you replaced the actuator before, did you notice any oily fluid inside of it?
Posted on Dec 23, 2008
Go to the autozone website at autozone.com and register your vehicle. It's free and you will have access to a full online repair manual for your vehicle. You can look at the procedures for making whatever repair you need to make and decide for yourself if it is a job that you feel comfortable tackling. Sure hope this helps and best wishes.
Posted on Jul 23, 2009
please note that if your vehicle battery drain to less than five volts or battery disconnect without computer memory saver will set that code. first where your battery drain or disconected or the computer just throw that code , if battery where drain or disconected you will need to take your vehicle to a dealer and have them perform throttle relearn or a reputable shop with a compatible scan tool . if battery not aconcern check electronic throttle body for binding ,sticking foreign material ,carbon if any present cleaning or replace is recomend and relearn
Posted on Feb 25, 2011
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The automatic transmission shift lock control switch
With the ignition in the ON position, voltage is supplied to automatic transmission shift lock control switch. Voltage flows through the normally closed contacts of the automatic transmission shift lock control switch to the automatic transmission shift lock control solenoid. The automatic transmission shift lock control solenoid is permanently grounded. This energizes the automatic transmission shift lock control solenoid causing the transmission shift lever to be physically locked in the PARK position. When the brake pedal is pressed the contacts in the automatic transmission shift lock control switch open, de-energizing the automatic transmission shift lock control solenoid. This allows the shift lever to be move out of the PARK position.
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