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2015 Sierra SLT self starting

Stlbluecard

By Stlbluecard
in Troubleshooting & Recalls

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Stlbluecard New Member

Stlbluecard

Posted
Posted

So my truck has 10k miles. The past two weeks, the alarm goes off by itself and the truck starts up. I was upstairs with both set of keys and no one was around the truck. Last week at my son's football game, I looked into the parking lot and saw my lights flashing. I was approx 500 ft away at the time so no way was the fob. As I got closer the alarm stopped, but the truck was still running. I went to gmc and four technicians looked at me as if I was a unicorn. Has anyone else had this issue??

Jordan18 Enthusiast

Jordan18

Posted
Posted

Perform an exorcism on the truck...

 

 

 

In all seriousness I haven't seen anyone else have this issue on these forums, I could be wrong.

ChevyRoofer Senior Enthusiast

ChevyRoofer

Posted
Posted

So my truck has 10k miles. The past two weeks, the alarm goes off by itself and the truck starts up. I was upstairs with both set of keys and no one was around the truck. Last week at my son's football game, I looked into the parking lot and saw my lights flashing. I was approx 500 ft away at the time so no way was the fob. As I got closer the alarm stopped, but the truck was still running. I went to gmc and four technicians looked at me as if I was a unicorn. Has anyone else had this issue??

 

Could this be someone trying to get into your vehicle and steal something?

 

I've seen in the past where they can get range extenders, for your fob to allow access for themselves.

BigBadSierra Senior Enthusiast

BigBadSierra

Posted
Posted

It could be the BCM module also. I suggest if it does it again take a video of it running and the fact your keys are with you.

 

Because without it the dealer is just going to say they can't repeat it.

 

Did this to me on another vehicle a 2010 Traverse kept taking it in for steering wheel noise.

 

Got the same answer could not reproduce.

 

Once I had the video they had to start working on it to fix it.

 

I ended up being one of the few people to get trial steering lines which corrected the issue.

 

GM later switched them all over to using transmission fluid in the steering as it corrected the issue as well for less.

Stlbluecard New Member

Stlbluecard

Posted
  • Author
Posted

No I don't think it was someone trying to get into the truck as it has done it at three different places. Does it at odd random times.. Did it again tonight as I was washing the tires. Started right up and then alarm went off.

 

I thought about taking a video but it does it so sporadically. I'm taking it in tomorrow again.

Dnt Senior Enthusiast

Dnt

Posted
Posted

I would suspect that one of your remote

key fobs is malfunctioning. Let us know what they say

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