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 2000-2003 models is #4114K (trade number).
Daytime Running Lights are Prone to Burning Out on GMC Yukon
Average mileage: 131,000 (90,000–153,000)
13 people reported this problem
2001 GMC Yukon 150,000 mi, Visitor
The daytime running lights on our 2001 Yukon have been changed twice on the rights side. It went out again and I dont think I will bother changing it out. We bought our Yukon new and have 150,000 plus miles on it. The first time the light went out was about 55,000 miles. It has been a great family car for us.
2004 GMC Yukon 90,000 mi, Visitor
Left side running lamp burns out after 1 day