I installed new LED tailights on my 2004 GMC yukon XL, they worked great for about two weeks and now both rear lights are not working. The reverse, Turn, brake lights, nothing is there a fuse that would cure this problem. Everything else works on the car but the tail lights. Can anyone plaease point m in the right direction I checked the fuses that sounded like it would be related to the rear light but they all look good/ Is there a fuse under the hood that I need check, I check all my fuses visually and with a Multi Fluke Meter to make 100% certain that they are OK. Please help. If you help me on this Ill mark you down that I owe you one, if you cure it and dont have any problems that I can cure Ill paypal you 20 Bucks. Take Care

There are certain fuses pertaining to the tailights under the hood, yes.

This link will take you to your owner'* manual. Start on page 5-113 for locations of each fuse box, and what each fuse is for.

http://www.extendedgmwarranty.com/ow...-GMC-Yukon.pdf

Keep your $20. We help people for free.

Thank you so much for the help, I truly appriciate it. Im also going to get some keys cut, do these have the transponder that needs to be programmed>

Being that it'* a Denali, I'm betting it does have the PASS Key on it.

My Silverado being an LS, does not. Only a run of the VIN will tell you that.

http://www.compnine.com is where you can do that.

key should say pk3 on it on the metal part.

there is a programing procedure if you have the other keys still, but if not its dealer program.

Ill call my dealer with the VIN and see if it requires programming. Thank you guys for your help. I was on the TahoeYukon forum and they were just rude over therre with there answer'* and Im glad I found this one Thank you guys for your help and being professional and courtious. Take Care Jonathan

Important:
• To initiate, this procedures requires that a learned master key be available.
• A total of 10 master keys or valet keys may be programmed to a single vehicle.
• This procedure adds keys only. The procedure does not erase previously learned keys.
• The keys to be learned must duplicate the mechanical cut of the current key.
• If more than one valet key is to be learned, immediately precede each valet key with a learned master key.

<LI type=1>With a previously learned master key, turn ON the ignition, with the engine OFF. <LI type=1>Turn OFF the ignition and remove the key.
Within 10 seconds insert the key to be learned. Turn ON the ignition with the engine OFF. The vehicle has now learned the new key.

Thank you guys so much, I have a master key so after I get them cut I will go on with this procedure if the dealer says they need to ne programmed. Take Care and thanks.

Ok I think I might have messed up and not noticed, I connected the rear LED lights first and they worked great. Then I installed the LEd turn signal in the front. I never had the Denali out at night to notice if the brake lights or stop lights are not working. So I think its my front turn signal and if I put resistors on my front LED tun signal I think that would cure my problem because I think it all started when I installed the LED turn signals in the front. Its all starting to make sense now. So I will put the old incodescent lights back in the front turn signals and see what that does. Then I will weight for my two 6 ohm 25w resistors to arrive and install them to my front LED and see what that does.