Journey with Confidence RV GPS App RV Trip Planner RV LIFE Campground Reviews RV Maintenance Take a Speed Test Free 7 Day Trial ×
 

Go Back   Keystone RV Forums > Keystone Tech Forums > Tow Vehicles
Click Here to Login

Reply
 
Thread Tools Display Modes
 
Old 09-09-2020, 01:40 PM   #1
John R
Member
 
Join Date: Jul 2012
Location: Traverse City,Michigan
Posts: 40
Trailer message trailer not connected

I have a new to me 2016 GMC 2500hd Denali. When hooked up to my fifth wheel, the info screen will alert the check trailer connection it then shows trailer connected. When this happens all the lights are working and I check the brakes and they are working, I've had it checked twice but still acting up. Anyone know whats going on?
John R is offline   Reply With Quote
Old 09-09-2020, 01:47 PM   #2
Texas Steve
Senior Member
 
Texas Steve's Avatar
 
Join Date: Oct 2018
Location: San Antonio
Posts: 294
On my 2019 Silverado 2500 HD, I have to turn the truck off before plugging in the 7-pin connector otherwise it gives me the trailer not connected message. Turn off truck, plug in trailer cord, re-start truck. Might give it a try on yours. Good luck...
__________________
Steve & Patti
Grand Design Reflection 315 RLTS
2019 Chevy 2500 HD Diesel Z71
Texas Steve is offline   Reply With Quote
Old 09-10-2020, 06:25 AM   #3
John R
Member
 
Join Date: Jul 2012
Location: Traverse City,Michigan
Posts: 40
Thanks i'll try that
John R is offline   Reply With Quote
Old 09-10-2020, 07:54 AM   #4
ewbldavis
Senior Member
 
Join Date: Apr 2020
Location: Canton
Posts: 289
check plug too - my Silverado had "check trailer" a couple times. Dirty/corroded plugs may create that message intermittently.

Congrats on truck - I love mine!
__________________


Eddy

2019 GMC Sierra 2500HD 6.0L
2020 Cougar 32BHS
ewbldavis is offline   Reply With Quote
Old 09-10-2020, 08:46 AM   #5
JRTJH
Site Team
 
JRTJH's Avatar
 
Join Date: Mar 2011
Location: Gaylord
Posts: 25,264
Also, the wiring harness is a "modular design" meaning that the same wiring harness is used for trucks with/without the 7pin/4pin connector. There is a "plug on the truck harness" behind the bumper. The trailer connector you see on the bumper plugs into that harness. There may be corrosion/water in that plug. So, crawl under your rear bumper, disconnect that plug, let it dry, apply di-electric compound to the terminals and re-connect it.

In Ford/Keystone combinations, there has been some history of "plug mismatch" between the truck 7 pin and the trailer 7 pin connectors... Ford's plugs are manufactured by one company and Keystone's "low bid umbilical harness".... A slight difference in tolerances between the truck/trailer connector pins can sometimes cause a problem with "computer monitoring of the connection".... I replaced the trailer 7 pin connector with a "quality aftermarket plug" and it solved all of my "disconnect messages"....

I'd first crawl under the truck and check that connector, then consider changing out the trailer umbilical plug for a "better, more reliable brand".

ALWAYS, ALWAYS keep di-electric grease on all exposed metal ends of both the truck and trailer connectors !!!!!
__________________
John



2015 F250 6.7l 4x4
2014 Cougar X Lite 27RKS
JRTJH is offline   Reply With Quote
Old 09-10-2020, 09:07 AM   #6
GMcKenzie
Senior Member
 
Join Date: Oct 2010
Location: Okanagan, BC
Posts: 916
My 2015 GMC had a recall for this. Maybe check if there is one for newer trucks and HD.
__________________
2010 Cougar 30RKS
2015 GMC Sierra Max Trailer

"Drinks for 6, Dinner for 4, Sleeps 2"
GMcKenzie is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Powered by vBadvanced CMPS v3.2.3
Disclaimer:

This website is not affiliated with or endorsed by the Keystone RV Company or any of its affiliates in any way. Keystone RV is a registered trademark of the Keystone RV Company.


All times are GMT -8. The time now is 11:30 AM.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2023, vBulletin Solutions, Inc.