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2015 GMC Sierra headlights won’t come on
Posted on 10/6/19 at 2:32 pm
Posted on 10/6/19 at 2:32 pm
One light burnt out this week. I finally went to change it today and noticed the other was out. Got new bulbs....still won’t turn on. Changed? the fuse and nothing. Swapped relays around and nothing. Checked the plug with the lights in the on position and only reading 7v ?both sides. Battery ready 14+v while on. Don’t know why it’s? only getting 7v at the plug. Any ideas??
This post was edited on 10/6/19 at 2:34 pm
7
Posted on 10/6/19 at 2:37 pm to Success
A 4 or 5 year old General Motors product of any kind probably needs 1 of everything.
In all seriousness, I would bet on a short or just a bad wiring connection.
In all seriousness, I would bet on a short or just a bad wiring connection.
Posted on 10/6/19 at 2:49 pm to Ace Midnight
Yea I agree. Been lucky so far. Only thing I can think at this point is wiring somewhere. Just odd I’m getting 7v at the plug
Posted on 10/6/19 at 7:48 pm to Success
You could also post this question on gm-trucks.com . That site has a troubleshooting section also 
This post was edited on 10/6/19 at 7:49 pm
Posted on 10/6/19 at 7:56 pm to weagle99
I’m sure you saw I did. Thanks
Posted on 10/6/19 at 8:27 pm to Success
I didn’t see your post over there. Hope they can help. Those guys are always tinkering with the K2 trucks
Posted on 10/6/19 at 8:42 pm to weagle99
Ha. Well I did. Got one response to check grounds which I did. This one has me stumped.
Posted on 10/7/19 at 12:21 pm to Success
Check the fuses
Posted on 10/7/19 at 12:29 pm to Success
quote:
2015 GMC Sierra headlights won’t come on
Do you have any after market off road lights, winch, etc?
Posted on 10/7/19 at 12:39 pm to Success
I had a similar problem with a Toyota Tacoma. The ground wire had gone bad. I attached a wire to the solenoid/capacitor thingy and attached it to the engine block and it worked until I totaled the truck a few years later.
Posted on 10/7/19 at 12:42 pm to Success
Silverado's and Sierra's have had wiring problems since 2008 or so in my experience, they'll burn through bulbs like crazy... My dad and I each have Silverado's and both of us have had to replace the wiring and connectors. Each were not too pricey or difficult to fix. It could also be a bad bulb... Good Luck!
Posted on 10/7/19 at 3:39 pm to waller123456789
I know I go through bulbs like crazy . The fogs also and they ain’t cheap
Posted on 10/7/19 at 4:15 pm to waller123456789
This all started with a burnt bulb which might be the fastest a new bulb has ever burnt in my driving life. Strangely one bulb came back on this am. Assuming it to be wiring at this point. No time or desire to chase that down so I’ll bring it in.
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