Having problems with your 2001 GMC Yukon XL ?

My 2001 GMC Yukon 5.3l 4WD SUV is having (2) transmission problems. 1.) When cold, it shifts HARD from 1st into 2nd but after the 1st time while the engine is warm, it shifts smoothly. It started doing this AFTER I had used it to pull a moving trailer for several trips in my small town. 2.) While driving on the highway, the engine RPM will run 2800 RPM - 3200 RPM when it used to run [email protected] 1000 RPM while driving 65-70 MPH. The transmission seems sluggish since I pulled that trailer last year

Posted / edited by AnonymousUser on : 16-07-2018

Answers :

Does the trany fluid smell burnt? Might want to have the trany flushed - torque converter too - and replace the filter in the trans. FYI you may know this but it is not recomended that overdrive be enabled when pulling a trailer - especially a heavily loaded one. Does your town have lots of hills - this is an added stain on the trany.
Repair Help & Product Troubleshooting for 2001 GMC Yukon XL

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