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).
Car Problem Reports
GMC Yukon Daytime Running Lights are Prone to Burning Out
GMC Yukon Problem
Average Mileage: 131,000 mi (90,000 mi - 153,000 mi)
Visitor, 2001 GMC Yukon, 150,000 mi
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.
Visitor, 2004 GMC Yukon, 90,000 mi
Left side running lamp burns out after 1 day