Hyperflash tail light C7
Thread Starter
Advanced
Joined: Nov 2013
Posts: 70
Likes: 17
From: Marietta Georgia
Hyperflash tail light C7
My left taillight signal indicator is hyperflashing. All bulbs are working and the right one works as it should. Is there a turn signal flasher somewhere? I thought maybe I would change it out but I can't find it. Where is it? Thanks in advance for any help that you can be.
Safety Car
Joined: Dec 2012
Posts: 3,862
Likes: 1,865
From: St. Louis Metro East IL
True, can't hurt to disconnect the negative battery cable for a half hour. Lower the windows first to make sure you can get into the car. Also make sure the metal key in your fob will open the hatch. You will probably need to reindex (reprogram) the windows.
Ron
Ron
Thread Starter
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Joined: Nov 2013
Posts: 70
Likes: 17
From: Marietta Georgia
Thanks everyone. I tried everything that was suggested. I dropped it off at my dealer today and they said they will get it fixed. They thought it may be a loose or pinched wire, but we'll see what it really is once they have time to look at it.
Tech Contributor
Joined: Oct 1999
Posts: 41,058
Likes: 9,821
From: Charlotte, NC (formerly Endicott, NY)
Usually if a light stops illuminating you will get a warning light on the IP and a message in the DIC. I had my LED turn signal in the passenger side headlight stop working last year. That required replacing the headlight assembly since the turn signal and DRL are integral to the module. Not a cheap price to get it repaired. GMEPP was charged $1839 for the repair. Of course the headlight module was more than 50% of that price.
Bill
Bill
Last edited by Bill Dearborn; Mar 20, 2020 at 02:52 AM.
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Cruising
Joined: Dec 2019
Posts: 11
Likes: 0
From: Drexel Hill, Pa (Phila area suburb)
Usually if a light stops illuminating you will get a warning light on the IP and a message in the DIC. I had my LED turn signal in the passenger side headlight stop working last year. That required replacing the headlight assembly since the turn signal and DRL are integral to the module. Not a cheap price to get it repaired. GMEPP was charged $1839 for the repair. Of course the headlight module was more than 50% of that price.
Bill
Bill
Unless someone has a fix for this recurring problem OTHER than changing out the entire WORKING headlamp assembly. I would be be willing to alter the software so the damn thing just flashes normal, since ALL lamps are actually lighted .... obviously the diagnostics are seeing a voltage/amperage that is out of the normal range GM designed for.
Last edited by Ray Hemsher; Sep 19, 2020 at 02:07 AM. Reason: addition of last paragraph
Cruising
Joined: Dec 2019
Posts: 11
Likes: 0
From: Drexel Hill, Pa (Phila area suburb)
What was the fix? {regarding thread #6 by RickHuntz .... tail light hyper flash}
Last edited by Ray Hemsher; Sep 19, 2020 at 02:22 AM. Reason: add to indicate what thread Im addressing
