One problem related to transmission gear slipping has been reported for the 2000 GMC Yukon. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2000 GMC Yukon based on all problems reported for the 2000 Yukon.
Original transmission was slipping and truck going into a "neutral" while on highway, took to dealer and they kept it 11 days had to replace entire transmission. Now, aprx 6 weeks later truck is again not shifting right, put in reverse from parked position, press accelerator and the truck slams into gear. When in drive from parked position accelerate and it revs and revs and finally slams into drive then intermittently while driving goes in & out of gear. Pretty disgusted for a xmas gift at $45,000. 00 never expected this.