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2020 GM SUV Question - Page 2 - Walleye Message Central
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  #11  
Old 06-29-2021, 12:31 PM
MikeF unlogged
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Do you have a trailer app in the center display?

If so ,connect the trailer plug and start the trailer light test.
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  #12  
Old 06-29-2021, 01:25 PM
mr ducks mr ducks is offline
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Default No trailer app on display.

Amazing--I spoke to a service manager at a local Chevrolet dealership and he says probably just a loose hot or ground wire.. he is going to get me in next week Wednesday to take a look at it. Says it can't be a big deal! Will update you after the appointment.
Thanks for the reply's
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  #13  
Old 06-29-2021, 01:47 PM
MikeF unlogged
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I take it this is a different dealership than in the your original post.

Good Luck and hopefully something simple.
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  #14  
Old 06-29-2021, 04:24 PM
thawk9455 thawk9455 is offline
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Don't recall seeing an issue on a GM but some vehicles don't always include all the needed relays to activate everything.

As an example, my 2010 Pathfinder didn't need anything to activate the brake lights, but it did need at least one extra relay to provide the continuous 12V power and maybe (can't remember) another for electric brakes (along with the brake controller). From factory the Pathfinder only came with a 4-pin connection but there was a genuine part to upgrade to a 7-pin (and was so simple I'm surprised they didn't just provide that to begin with).

In any case, a full set of relays was pretty cheap and left me with a spare I keep if one would happen to fail somehow.

Dealership should be able to track it down pretty quickly in any case.
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  #15  
Old 06-30-2021, 09:05 PM
oldlund oldlund is offline
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I have a Yukon.
Had this happen twice.
First timeó dead fuse to activate reverse trailer light which activates solenoid
Second- dead solenoid.

I donít have a trailer brake controller


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  #16  
Old 07-09-2021, 09:02 AM
mr ducks mr ducks is offline
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Default Problem Solved!

Took it to a chevy dealer and he discovered the problem in less than 15 minutes! There was a bent prong on the backside of the truck plug in so it was not making contact with the plug in! Amazing! But certainly glad it was such an easy fix!
Thanks everyone for the help!
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  #17  
Old 07-09-2021, 09:38 AM
MikeF MikeF is online now
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Gotta love the simple fixes in life.

Not all techs or dealers are alike.

I would walk into that other dealership and tell him you have found a new one.

Good Luck
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  #18  
Old 07-27-2021, 08:39 AM
REW REW is online now
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Simply put.

To activate the brake release, there needs to be +12 volt on the blue wire coming from the tow vehicle when the tow vehicle has its ignition turned on and the vehicle in reverse.

If not, fix it so that it does.

Often the case is a simple blown fuse on that circuit in the tow vehicle. But, with your vehicle, it could be tied into the system software and electronic systems of the tow vehicle.

Take care
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  #19  
Old 07-27-2021, 02:29 PM
Snowking Snowking is offline
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REV did you not read the posts? It was a bent connect pin in the trailer plug.
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