The daytime running lights are prone to burning out. Our technicians tell us that the light sockets may show signs of heat damage but usually are OK. Always be sure to use the correct replacement bulb for the best life expectancy. The new bulb recommendation for 2001-2003 models is #4114K (trade number).Google+
Car Problem Reports
GMC Yukon XL Denali Daytime Running Lights are Prone to Burning Out
GMC Yukon XL Denali Problem
Average Mileage: 91,228 mi (40,000 mi - 170,000 mi)
Visitor, 2003 GMC Yukon XL Denali, 104,000 mi
my daytime run lights are not working after replacing the passenger side day light bulb. my driverside seat controls stop working soon after. the seat heating control in the driver door has stop working also.
Visitor, 2002 GMC Yukon XL Denali, 91,602 mi
Seems to be melting housing for the driving lights just replaced bulb but have also noticed other sockets melting so new sockets and bulbs
Visitor, 2005 GMC Yukon XL Denali, 130,000 mi
Day time running lights on most all GMC and Chev product burn out
typical gmc, seems all gmc running lights go out on a regular basis, try the installing the longer life bulbs that have a better filiment in them..
Visitor, 2005 GMC Yukon XL Denali, 60,000 mi
DRL bulb burns out frequently
Visitor, 2003 GMC Yukon XL Denali
Several burned out daytime running lights over the course of owning this vehicle.