Anyone know the bulb size, of a 2007 Sierra, for the foglamp. I think it is the H3C, but not sure. Or am I just going to have to modify it. Any insight will be helpful.

Thanks and keep on truck'n.

 

If it's the same as a 2003 which I think it is, I'm pretty sure the low beam and high beam are different. The low beam is 9006 and according the thing I read in Wal-mart the highbeam was optional between 9005 and 9006. Course a bad $7 lightbulb is a good excuse to drop $200-$300 ona HID conversion kit, LOL! Just kidding. But I would also like to convert to HIDs when I get the money.

 

Actually the low beam on the new ones is H11, 9007 for the high beams. My dadhasa '03 sierra, his fog lamps are 9006.The new body has some wierd bulbs for the foglamps. I seen the number but no match for the HID conversion. The closestI see is H3C, don't know if that is it. $200 for a conversion is worth it. Gives the truck that luxury look, turns heads and it brights up more than regularHalogen.

 

Yeah, I'd just rather put the money into something more useful right now. I think the next thing on my list is a custom ECU tune.

 

HID CONVERSION WAS ONE OF THE BEST THINGS I DID FOR MY TRUCK....IT MAKES SUCH A GREAT DIFFERENCE WHEN YOUR DRIVING AT NIGHT. THOSE HALOGENE LIGHT BULBS I THINK ARE OUT DATED AND EVERYONE SHOULD JUST UPGRADE A.S.A.P.

 

I think I'm gonna wait and get some Denali headlights and HIDs at the same time. Kinda change the whole look at once.