SOURCE: 2001 Yukon XL SLT 4 speed Auto Transmission shift problem!
Sam,
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.
Good Luck
Testimonial: "Thanks alot richtko94'! I'll try that!"
SOURCE: Shifting Problems
when has the last time you had a trans serv. done on it? if you take it to a shop the will tell you that you need a rebuild. thrid gear and over drive are about burned up.
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