2004 yukon xl

SOURCE: 2001 yukon xl 6.0 ltr engine-transmission problem

It sounds like it may be an electrical problem. Maybe a problem with the TCM, or a sensor.

SOURCE: I have a GMC Yukon XL that shifts hard 1st to 2nd gear.

sound like shift valves sticking in valve body.

SOURCE: 1996 gmc yukon transmission fluid level and color

internal damage replace transmission or rebuild

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: 2004 YUKON XL DENALI, new throttle messed up delayed shift points

I recently had a low engine power on my 2003 Denali. The check engine light came on and I couldn't go above 40 mph. I took it in the next morning but by this time the check engine light had gone off. The mechanic had just recently seen the same problem in another Denali in which they changed the battery and had no problems since. I also decided to have them change out my battery and I have not had the problem since either. I would stay away from the dealership if I were you, and always get a second opinion. Most smaller shops wont charge for a diagnostic where the dealership will charge at least 80 just to tell you what might be wrong and that will only work if you have a warning light on at the time.