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 Chevrolet Suburban 2500
Average mileage: 115,000 (95,000–150,000)
12 people reported this problem
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Plan on replacing both bulbs every year
running light burn out every few months
DRL burn out every 1000 miles or so. First one side then the other. I just keep replacing the bulbs.