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 Sierra 2500 HD Daytime Running Lights Are Prone to Burning Out
GMC Sierra 2500 HD Problem
Average Mileage: 128,630 mi (65,000 mi - 272,000 mi)
Visitor, 2004 GMC Sierra 2500 HD
Passenger side daytime running light won't work replaced with new bulb still dosent work socket shows burn signs
Visitor, 2002 GMC Sierra 2500 HD
They burn too hot. Just bad design by GM. You can switch to LED lamps
Can't get my DLR's to work, sockets look burned. Fuses are ok, bulbs replaced.
Visitor, 2006 GMC Sierra 2500 HD
My DLRs do not work. I have changed bulbs, fuses, checked relay. LIke others I found the sockets a little burned. I have turned the ignition on and took in out of park during the day. Still not lights. It is like there is no power going to the socket. Does anyone have suggestions as to how to fix this?
Visitor, 2005 GMC Sierra 2500 HD, 85,000 mi
Daytime running light burns out every time I change them out.
Visitor, 2003 GMC Sierra 2500 HD, 120,000 mi
Burned out sockets and lights
Visitor, 2006 GMC Sierra 2500 HD, 65,000 mi
bought the truck used, drivers side running light burned out twice in less than a year. Socket looks burned.
Visitor, 2001 GMC Sierra 2500 HD, 218,500 mi
Same problem with the lights burning out, now the socket has burned up and fallen apart. No solution yet.maybe factory defect
Visitor, 2001 GMC Sierra 2500 HD, 272,000 mi
Same- can't find a more robust bulb. They don't last.
Visitor, 2005 GMC Sierra 2500 HD, 120,000 mi
Started happening near the same time as my dash cluster failed. i've tried different bulbs, I have just left both bulbs out after 4 attempts.