The sunroof may stop working for various different reasons. Our technicians tell us it is often better to replace the complete sunroof assembly than to try and repair the old one.Google+
Car Problem Reports
GMC Yukon XL 1500 Sunroof May Fail
GMC Yukon XL 1500 Problem
Average Mileage: 135,313 mi (61,253 mi - 184,000 mi)
Opens fine, but often won't close. Appears that one side of the motor switch is going bad.
Visitor, 2006 GMC Yukon XL 1500, 61,253 mi
sunroof frame broken caused sunroof to cock and get stuck
Visitor, 2000 GMC Yukon XL 1500, 184,000 mi
sunroof will not close all the way open fine but stops short of closing completly
Came off track. Haven't fixed yet.