2007 Sierra Headlight issues

wirenut495 · January 1, 2014

Ok yesterday morning was a morning like any other in dec in Pittsburgh brutally cold so i used my remote start to start my 2007 gmc sierra (new body) in my driveway

i got in my truck as usual started to back up out of my driveway and once out on the road i noticed my headlights weren't on i looked down to see the switch was in auto so i jumped out and checked the lights parking lights working fine, fog lights working fine, high beams working fine, only thing not working low beams

so i drove to work with my high beams prob pissed a lot of people off on INT 376 since they are silverstars

call my brother when i got home ( he is a mechanic) asked him if both would pop at once he told me not probable not impossible either told me to check the fuses

so this morning i checked all the fuses they all look correct as i move the switch back and forth i here a relay under the hood could it be that both low beam lamps popped at the same time like a current spike that took them out

I am open to any and all comments about this issue i really don't want to go drop another 50.00 in lamps again but if that corrects it i will

00Silverado4x4 · January 1, 2014

I moved your topic to the Full Size section.

demonte1997 · January 1, 2014

Assuming the low-beams are Silverstars too, they could have both popped at once. For whatever reason, there have always been quirks with those bulbs. You don't have any other low beam bulbs that you can try? Like your brother said, it's not probable but it's possible.

2017SierraSLT · January 1, 2014

Substitute one of your old ones if you kept them for one of the Silverstars and see what you find. I have seen where two filiaments in different bulbs go at the same time.

wirenut495 · January 1, 2014

well as much of a pain in the rear as they are to change i replaced both low beams lamps as they were both popped hopefully it was just a fluke spike in the elec system thanks for all the input I'm gonna be a regular on here

2017SierraSLT · January 2, 2014

I don't think the truck was at fault. I have not had good longevity from the Silverstars.

Wires · January 2, 2014

FYI, Silverstars are notorious for being POS's that fail in 6-12 months.

I had the same issue on my 2008 with the stock bulbs though. Both low beams blew at the same time. It appears to be a common issue with the GMT-900. The GM tech's will tell you that one was already gone, and you didn't see it out, but that's BS. I park in my garage everyday, so you'd notice a blown bulb.