2003 Denali Low Lights wont come on

[pjsdds00]

2003 Yukon Denali
6.0 V-8
34,000 miles
No problems in past.

Hoping this is a simple fix. Low lights won't come on. I have auto on lights. I tried turning on manually, no luck. The high beams work, if clicked.Daytime running lights work, rear lights work etc. No damage to vehicle no warning with this issue. I traced the fuses and the rt and lt 10-15amp low headlamp are fine under the hood . I checked the relay, seems to be fine. I'm stumped.

pete

[denalitwin]

maybe they are burned out

[pjsdds00]

you are correct, I just brought it in and they were burnt out. I've never had two bulbs out at once, that threw me one.

thanks for the reply.

[the blur]

how much did that cost you ??
mine just went out ..

[tonytone]

Originally Posted by the blur

how much did that cost you ??
mine just went out ..

Not that you asked me, but roughly $8/bulb at your neighborhood auto parts store...or $20/bulb if you want to go w/ Silverstars.

[the blur]

I have been researching bulbs. I know the Denali calls for 9005, but some books say 9006. they look similiar.

how bout the DRL's. all the books are WRONG. GM now calls for a 4114K, and no one carries them except the dealer.

I saw the silver star by sylvania. but sylvania bulbs do NOT last long at all. even the LL bulbs are garbage.

[tonytone]

Originally Posted by the blur

I have been researching bulbs. I know the Denali calls for 9005, but some books say 9006. they look similiar.

how bout the DRL's. all the books are WRONG. GM now calls for a 4114K, and no one carries them except the dealer.

I saw the silver star by sylvania. but sylvania bulbs do NOT last long at all. even the LL bulbs are garbage.

I believe '01-'06 Denalis use 9005 for both low and high beam (I am not 100% sure on '01 and '02, given that I've not personally looked at them in person, but I don't have much reason to believe that the headlight assemblies used in those model years are any different from those used in '03-'06).

GM switched to 4114K in '03 (or was it '04) due to NBS DRL bulbs burning out prematurely. From what I've read, some folks have had success using a 4156 in place of a 4114K; do not use a 3156 bulb though--even though they appear to work, their use was one of the primary reasons why GM switched to 4114K bulbs.

Yeah, Silverstars don't last as long as many typical plain-jane halogen bulbs...but YMMV--some people have reported that theirs have lasted over a year.