05 GMC Yukon Denali XL turn signals operate hazards issue

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#1
Hi!
My 2005 GMC Yukon Denali XL (6. 0L V8) has been having issues with the turn signal activating the hazard lights. It used to be only when I used the right turn signal, the hazards would come on, but now it randomly happens with both. It'll do it for maybe 15 minutes or maybe up to 3 days.

I read on Edmunds. com that someone with the same issue replaced the multifunction switch and it didn't go away. I think this GM TSB might have an answer, but am not sure:
gm technical service bulletins number 01946

Any ideas? I hate to mess with the multifunction switch (expensive) if that won't fix it.
Thanks!
 

Jim Davis

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#2
Flasher control module, under the drivers side dash panel, on the bottom. Check with gm or parts place on the part number.