2004 denali rear taillight issues

[YukonXL04]

Pretty sure that replacing the rear lights with LEDs have lowered the resistance (since the LEDs don't draw as much juice) so the flasher thinks there isn't a load on the rear lamps because your bulbs are blown. You might need an inline resistor for the rear turn signals to make it flash with normal frequency.

That is correct. however other users that have the same spyder led taillights have said they are built in. They were on my Spec D Tuning brand as well.
I would check to make sure there is a resistor box on the back of the housings.
Also make sure the fronts are done correctly as well.

 

[wolferine358]

Thank you all for your help, and srth8r as I checked it was a blown fuse, thank you all for your input. Glad to be on this site. Now I'll just deal with the hyper flashing. No biggie

 

[Big Buttons]

Buy an led flasher and you shouldn't have the issue any more. That's what I had to do when I converted my fronts to leds.

 

[SRTH8R]

Glad half of it is fixed. If you get a led flasher then you can run LEDs in everything if you want.

 

[ScottyBoy]

This "LED flasher " that you guys are speaking of, is it just a plug and ug replacement flasher that eliminates all hyper flashing? If so, where can I find one?