Question about 2003 GMC Envoy
Posted by Anonymous on
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Posted on Jan 02, 2017
Low fluid can cause slipping. (depends upon how low) Most manufacturers post "safe" tow speeds. These are generally ignored. (not good). I recommend towing with driveshafts removed and where driveshaft has a "slip yoke" you install a yoke from a scrapyard and wire it to the tailshaft so it stays in place (keeps oil in and dirt out) Although you can't just detach the tow-bar and drive, it eliminates any possibility of trans damage, since the transmission cannot turn. (most use oil from pump to keep gearsets cool...when towing, pump is not pumping and over time and distance it can damage trans internals.)
Hope your problem is just low fluid and not a rebuild...keep in mind what I said though.
Posted on Jun 09, 2009
put the truck shifter from park to neutral then shift 4x4 button into 2whl Or Auto which ever you prefer. note when always shifting into low 4x4 or out the transmission MUST BE in neutral
Posted on Sep 07, 2009
the front actuator is not working..If you open the hood and under the battery is the plunger that pulls the cable for the 4x4..If theres a vacuum leak it will not in gage.It could also be the sensor in the transfer case..What you could do is you may have to pull the tray out that holds the battery in and see if the actuator/plunger has a hole in it..It looks like an old chevys cruise control but it is directly under the battery...You can pull the plunger in and try and move the car to see if it locks in to rule out any bad parts in the front axle..If that works the problems a little easier to figure out..Either the plunger has a hole in it and cant hold vacuum or theres a hole in the vacuum lines to it..The vacuum lines also run all the way back to the transfer case also so they could have a hole in them also.If those are all good then the sensor in the transfercase on the top of it and its either a three wire or four wire is bad..Hope this helps you have a great day
Posted on Dec 08, 2009
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