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

    250.6k
    Total Topics
    2.7m
    Total Posts

  • Member Statistics

    342,993
    Total Members
    8,960
    Most Online
    President Roberto
    Newest Member
    President Roberto
    Joined

  • Who's Online   0 Members, 0 Anonymous, 213 Guests (See full list)

    • There are no registered users currently online

  • Latest Articles

  • Posts

    • bwiese
      upgrading speakers on 2026 std cab WT...

      By bwiese · Posted

      I don't wanna do major surgery/upgrades, behind-the-dash work, add amps, change radio etc. on my '26 std cab WT. On the WT, it has the base 7" IOR infotainment setup, and only two speakers (doors). Since I listen to classical, looked around for speakers that do well and dug thru reviews. Two-way speakers were found to be better than 3-way. So I've ordered a pair of  Infinity Reference REF-9632IX 2 way speakers.  [These may  or may not have been discontinued / succeeded by the 3-way ...9633 ones.]    These speakers are lauded for 3 ohm and 94db sensitivity spec so they'll work well for ordinary base car radios without amps and offer better performance (quality,  strength) than  default base paper-cone speakers. They'll be installed in a few days and I'll let y'all know what I think. Bill W San Jose      
    • RyanbabZ71
      RyanbabZ71's 2019 High Country

      By RyanbabZ71 · Posted

      Thanks!   Changed out the rear shocks today to Bilstein 5100s.  So far feel much better. The stock Rancho were wore out.  Lots of heavy hauling (2 moves, home renovations, etc).  Next up is new BFG tires Monday.  Cant wait the current tires have little to no wet traction and are super loud (hum)    
    • Snowcamo
      No high speed fans...

      By Snowcamo · Posted

      Ok, I got the all the codes. What do you all think would be a place to start?
    • Chuck FB
      Correct way to service 2024 l8t allison trans?

      By Chuck FB · Posted

      How about I just point to the factory pans stand pipe little drain plug and claim its a pan with a real drain plug !. I just couldn't swallow the fact that a Dorman pan which at this point is probably the only pan out there that fits the gas version truck cost that much up here in Canada so I decided initially anyway to skip it and see what I thought of pulling the pan method and down the road if I felt inclined enough then I would either install a drain plug kit in the factory pan if there is enough room for it, or have a bung welded onto it, or put an aftermarket pan on. The thing is if the pan is not pulled then the magnets in the pan can't be inspected and cleaned or if wanting to change out the filter. However of course it certainly would make the job easier to be able to drop the oil first before having to handle the pan if dropping the pan that go around was the goal.    I knew a guy locally that was doing custom field spraying years ago with a pickup pulling a ground driven sprayer, I believe it was a GM pickup with an automatic trans. He had a drain plug in his pan and would drop the oil out of it once a week and top it back up through the dipstick tube to keep refreshing a portion of the oil often and that made the transmission last far longer than had he done nothing. Soft fields pulling 500 gallons of water at the start of each mixed up sprayer tank batch and in low range sucking along. I imagine he got some tips from other custom sprayer outfits doing the same thing at the time and learning from their blown up tranny mistakes. Transmissions then had no lock up converter so would cook the crap out of the fluid slipping that much and it would not have been synthetic fluid either. 
    • KARNUT
      Gas Prices

      By KARNUT · Posted

      3.39 Kroger’s in Montgomery Texas. 

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...