Two problems related to sun roof have been reported for the 2003 GMC Yukon. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2003 GMC Yukon based on all problems reported for the 2003 Yukon.
When it rained, water entered the cabin of the vehicle. The dealership maintained that the water was coming through the roof. The dealership replaced the seal on the rear and the front of the sunroof but the problem recurred.
When it rains water leaks inside the sun roof. Also, water leaks into sun roof when vehicle is inside a car wash. There is technical service bulletin 01448 which deals with this problem. Dealer attempted to repair vehicle on four different occasions.