The inside and outside door handles are prone to breaking.Google+
Car Problem Reports
GMC Yukon Denali Inside/Outside Door Handles May Break
GMC Yukon Denali Problem
Average Mileage: 138,571 mi (65,000 mi - 200,000 mi)
Visitor, 1999 GMC Yukon Denali
Driver side and rear door
Visitor, 1999 GMC Yukon Denali, 115,000 mi
Inside passenger handle broke, replaced with new and better reproduction. Cheap and easy repair.
Visitor, 2007 GMC Yukon Denali
I have had to replace the exterior driver side door handle twice now once at about 70,000 and again at around 120,000 miles. I would highly recommend buying a replacement part online/eBay and install yourself or bring to local mechanic shop. Overall it will cost you a quarter-half as much as you would at GMC dealership.
Visitor, 2007 GMC Yukon Denali, 78,000 mi
door handles break
Visitor, 2007 GMC Yukon Denali, 100,000 mi
Outside door handles break loose from inside support bolts. Not fixed yet.
Visitor, 1999 GMC Yukon Denali, 169,000 mi
1999 Yukon denali ...love the SUV just sucks that three inside door handles are broken from inside the car Everyone feels trapped.
Visitor, 2000 GMC Yukon Denali, 168,000 mi
After I make a turn the. Blinkers go off but the blinker noise continues after I make the turn plus my windshield wipers have a mind of their own they keep going for a minute before they cut off on my 2000 Yukon Denali
Visitor, 1999 GMC Yukon Denali, 200,000 mi
inner door handle on drivers side will not open door
Visitor, 1999 GMC Yukon Denali, 160,000 mi
Both back door handles (one inside, one outside)have broken twice. Now the inside drivers side door handle has broke....ridiculous!