Jump to content

7-way plug issues

Shawn O'Leary
 Share

Recommended Posts

Shawn O'Leary Enthusiast

Shawn O'Leary

Posted
Posted

Hi Guys:

 

Bought an Airstream to tow behind my 2019 GMC Sierra Denali (added a leaf spring package and the Brembo brake upgrade to assist with it, but that's another topic). Anyway, the truck doesn't recognize the trailer nor any tester units. Only the 12v power works; none of the signals/lights (rechecked with a multimeter and the same). I've checked the connections and grounds and as far as I can tell everything is fine. I've checked it both with tow/haul on and off; same deal. 

 

Before I throw my hands up and make an appointment with the dealer is there anything obvious I'm missing? Thanks!

RocksRock Enthusiast

RocksRock

Posted
Posted
20 minutes ago, Shawn O'Leary said:

Hi Guys:

 

Bought an Airstream to tow behind my 2019 GMC Sierra Denali (added a leaf spring package and the Brembo brake upgrade to assist with it, but that's another topic). Anyway, the truck doesn't recognize the trailer nor any tester units. Only the 12v power works; none of the signals/lights (rechecked with a multimeter and the same). I've checked the connections and grounds and as far as I can tell everything is fine. I've checked it both with tow/haul on and off; same deal. 

 

Before I throw my hands up and make an appointment with the dealer is there anything obvious I'm missing? Thanks!

Hi Shawn:

I pull a large equip trailer. It was plug and play, no problems.
 

I used to pull a 26’ Passport. I would check fuses on RV and truck first. 
If all good there, then dealer. 
Hope this helps. 

Shawn O'Leary Enthusiast

Shawn O'Leary

Posted
  • Author
Posted
7 minutes ago, RocksRock said:

Hi Shawn:

I pull a large equip trailer. It was plug and play, no problems.
 

I used to pull a 26’ Passport. I would check fuses on RV and truck first. 
If all good there, then dealer. 
Hope this helps. 

Didn't think of the fusebox (slapping my forehead). Will check that next before taking it in. 

slj2008 Senior Enthusiast

slj2008

Posted
Posted

Why didn't Airstream check them out when you hook up ??   ON my 2015 the cables were laying by the Fuse Box ( under hood ) one for 12volts power , and the other for all your lights . CHECK your main Fuse box under hood.

EddDe Enthusiast

EddDe

Posted
Posted
12 hours ago, Shawn O'Leary said:

Hi Guys:

 

Bought an Airstream to tow behind my 2019 GMC Sierra Denali (added a leaf spring package and the Brembo brake upgrade to assist with it, but that's another topic). Anyway, the truck doesn't recognize the trailer nor any tester units. Only the 12v power works; none of the signals/lights (rechecked with a multimeter and the same). I've checked the connections and grounds and as far as I can tell everything is fine. I've checked it both with tow/haul on and off; same deal. 

 

Before I throw my hands up and make an appointment with the dealer is there anything obvious I'm missing? Thanks!

Download TSB 20NA198 at this link. There is a problem with 2019 models where light circuit will overload if too many incandescent bulbs are on a trailer. Issue was changed on 2020 models to allow more amps.

https://www.carcomplaints.com/Chevrolet/Silverado_2500/2020/tsbs/tsb-20na198.shtml
 

Dmax3 Enthusiast

Dmax3

Posted
Posted

I've gotten "no trailer connected" notice a few times.  The truck receptacle does move in the mount, but the dealer told me it's normal and they couldn't replicate my issue.  I'll double check my trailer wiring, but pretty sure it's the truck, not the trailer.

LSMAN New Member

LSMAN

Posted
Posted

I have an Airstream as well. (On my 4th one).  When I purchased my truck remotely in march 2020  and the dealer delivered it (2020 RST) , There was no brake controller for towing. I made it very clear that I have an airstream and the sales guy apologized for mistake. His boss allowed him to purchase an aftermarket controller for me. it was ordered and sent to me-  I installed it. Looks factory. (I installed something similar an  aftermarket controller in my 06 Silverado for my 1966 Airstream)

Sorry if I missed the obvious here but does your truck have a factory brake controller?  If not you need one. If it does have a controller her is what I would do: 

Check the grounds on both the trailer and the truck.  Bad Grounds cause most problems.  With trailer unhooked from truck use a 12 volt battery and power up the trailer lights individually: running lights, brake lights electric brakes. Verify that the problem is not on the trailer side first. make sure that you do not power up the emergency brake pull. If engage for long period powering this will burn up that (plunger switch with cable.) LED lights will not cause the above problem.

  • 4 years later...
Colin Wayland New Member

Colin Wayland

Posted
Posted
On 1/21/2022 at 11:53 AM, Dmax3 said:

I've gotten "no trailer connected" notice a few times.  The truck receptacle does move in the mount, but the dealer told me it's normal and they couldn't replicate my issue.  I'll double check my trailer wiring, but pretty sure it's the truck, not the trailer.

 

On 1/16/2022 at 5:03 PM, Shawn O'Leary said:

They did, it's the truck not the trailer. Fuses are present and all good. Going to the dealer Tuesday. 

What ended up fixing your issue Shawn? My grandpa is experiencing the exact same issue and cannot figure it out. Thanks.

Colin

davester Senior Enthusiast

davester

Posted
Posted

...just fyi, both Shawn and DMax haven't logged onto the site since around when this thrad was active, 4 years ago.  you aren't going to get a response from either user...

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing

  • Recently Browsing   0 members

    • No registered users viewing this page.

  • Forum Statistics

    250.5k
    Total Topics
    2.7m
    Total Posts

  • Member Statistics

    342,962
    Total Members
    8,960
    Most Online
    contrabombarde
    Newest Member
    contrabombarde
    Joined

  • Who's Online   3 Members, 0 Anonymous, 1,307 Guests (See full list)

  • Latest Articles

  • Posts

    • richard wysong
      Needing this part.

      By richard wysong · Posted

      Still looks like a rivet to me in the pics, I don't see a nut and none of the pics show the head of the screw. But if you says so.....
    • jgaudet99
      Tire psi

      By jgaudet99 · Posted

      Thanks for all the help so far!   I did try right from 2026 right down to 2021, and only from 2023 down lets me select the option for tire psi change, but I get the vehicle not supported error!   I'll definitely try it under Chevrolet after work today, and I'll get the sensor number from gm for my truck tire sensors. And I'll let you know if it works for me under Chevrolet!   And if that doesn't work, I'm going to guess that what @Atlas said about maybe I have a different body control module could be true!  
    • Jsdirt
      2010 Avalanche 5.3 not running correctly after engine swap.

      By Jsdirt · Posted

      From where I'm sitting this sounds like a compatibility problem. I'm assuming the 2007 was a 900-series truck, and not an 800-series (they were sold side-by-side in dealerships that model year), since it starts and runs.   This is why I HATE post-2006 vehicles. Everything becomes a huge problem when you try to keep the thing running for longer than the manufacturer has designed it to.    I can't remember when Global-A architecture started - either '10 or '11. For your sake, you had better hope it's '11, or you're going to be spending some BIG money to correct this cluster-eff. That's something you need to find out before doing anything else. You may have several computers bricked ... but the fact that it runs tells me you MIGHT be ok here.     EDIT: Just did a quick refresher. You're screwed. This is Global-A. The 2 systems are NOT compatible in the slightest. Once you get the correct engine in there that IS compatible, you're going to need to see how many computers are locked. Absolute NIGHTMARE to straighten out, too. Your buddy might be better off cutting his losses and finding something else.   Welcome to post-2006 vehicle electronics. This is why I quit the industry, and drive nothing built after 1994. This stuff takes all the fun out of wrenching!  
    • bwiese
      Show Us Your 2019 & Up T1 Pictures !

      By bwiese · Posted

      Recently acquired new 2026 Silv. 1500 WT  - L3B + 4WD,  std cab + std bed, in (duh!) Sierra White. Upgrades: replaced 'steelies' w/  Vision "Flow" black alloys,  17x8.5"; HDX nerf bar w/steps (black powdercoat); Weatherguard large/deep alloy saddle toolbox; Michelin fitted bedmat (sale, perfect fit) Weathertech door sill guards TBD: rear wheebox liners 4x black fender arch trim - searching for best  (Putco: chrome only; not looking for flares either!) -Bill    
    • Chuck FB
      Tire psi

      By Chuck FB · Posted

      True, hard to say what differences there may or may not be between Chev and GM as well as a production year or mid year part change either.    I just found it odd that under the Sierra choice on the Autel that many of the last few years of production year did not include the choice of changing the tire pressure but if that is an Autel thing or a GM thing as to why the choices were not there. Knowing what tpms sensors are on the truck should give some guidance into which choices on the tool even make sense to try as I wouldn't give up just yet with the tool but I guess he will see what if anything he comes up with if he finds out a bit more info and tries a few more things on the Autel. 

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...