Question about 2002 GMC Envoy
Rebult trans lasted 30 days and just started to up shift then down **** then went out the high speed gears no high speed gears trans fluid is black-- and what is the transfeer case supose to have in it--does the trans fluid go from the trans to the transfere case--other words does it mix?
Transfer case fluid is different from the trans fluid, transfer case takes a Blue fluid made by G.M. can't think of the name of it, and trans takes Dex III or IIII read manual, if it is getting to transfer case then you deal between the trans and transfer case is bad causing it to **** the fluid out of trans, need to change the seals this time. Car Quest sells a 1 piece seal that seals both units instead of 2 different seals. Good Luck
Posted on Aug 30, 2012
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Posted on Jan 02, 2017
SOURCE: 2002 GMC Envoy is having
I ran into this concern with my 2002 and my wife ran into the almost identical problem with her 2003. this may sound silly,, but it was the clutch fan. Extreme loss of power from time to time came first. Then a roar of the what seemed like the engine when stopping. Actually cut off after it started to roar at highway speeds, and had absolutely no excelleration from time to time. Sometimes all of the symptoms completely went away. After taking mine to the dealer several times, finally they got it right and replaced the fan clutch. When my wifes 2003 SLt started doing the exact same thing as my 2002 had done, we both knew what the problem was, and the dealer did a quick fix. $600.00. Perhaps this should have been a recall feature, but never was. Everyone that I know that has an envoy, somewhere around the 72,000 and 103,000 mile mark has had this problem and have had to have the clutch fan replaced. It may sound like the vehicle is going to have to be junked,, but that is all it needs.
Posted on Dec 01, 2008
i would try to get down to the linkage adjustment and see if maybe it is not adjusted properly or if it jumped out of alignment. Place the transmission in park and the selector in park after loosening nut and then tighten down the nut.
Posted on Jul 09, 2009
I would start with a transmission fliud and filter service.
I would then have the trasnmission checked out by a transmission shop. The transmission most of the time has the direct drum band is starting to go. The shops can rebuild it no problem, This is a very common failure wiith the trasnmission.
Posted on Aug 16, 2009
Testimonial: "Thanks alot richtko94'! I'll try that!"
not sure if this is the answer yet but i have the same problem with the same codes i work at an auto parts store and a few of the techs that are customers have lead me in the direction of changing the ignition switch, i am doing it today will let you know if it solves the problem
Posted on Jan 27, 2010
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