My 1998 GMC Sierra turn signals and hazard lights aren't working externally, or clicking and flashing on my dashboard. Could this be the combination flasher relay, or what would the best guess be?

SOURCE: can't find flasher relay on 1998 gmc jimmy 4x4

It seem to me GM did something those years, I think there is actually a moduel that you have to replace to get the turn signals to work again. I don't remember what year they went to that but, I think it was right in that area. Sorry I can't be more help.

SOURCE: 1998 GMC Sierra Signal Fuse Blowing

have you done any trailer wiring or drilling on the body? also check the flasher unit.

Stephen

• 21873 Answers
• Posted on Jun 15, 2014

SOURCE: Why won't my hazard lights work on my 1996 GMC Sierra pickup.

Do you have power in and out of the hazard flasher ?

SOURCE: I have replaced the flasher relay on my 2004 GMC Sierra but the hazard and signals still do nt work

Hi there I am technical mechanical and electronic engineer mechanic and sir Terry is right to but I have seen the ignition key and ignition switch to be the problem not sending the signal to the mod