Transparent trailer won't calibrate

[donbaldw]

On 9/12/2023 at 3:53 PM, MTU Alum said:

Great.  There is a software bug we discovered with another TAC case.

Have a brand new 2024 3500HD Denali and Trailer Camera PN 85118298. Have gone through all of my travel trailer measurements including lowering the height to 118" and cannot get it to finish the calibration. I've been working with the 

GMC dealer that sold me the truck 3 weeks ago and am getting nowhere. Do you have any suggestions? Any details on your TAC case?

[PBNB]

On 1/23/2025 at 8:02 AM, donbaldw said:

Have a brand new 2024 3500HD Denali and Trailer Camera PN 85118298. Have gone through all of my travel trailer measurements including lowering the height to 118" and cannot get it to finish the calibration. I've been working with the 

GMC dealer that sold me the truck 3 weeks ago and am getting nowhere. Do you have any suggestions? Any details on your TAC case?

Does your camera work to see whats going on behind just as a backup camera? It may also be that the part number is older and has been replaced with a new part. 

[donbaldw]

Thanks for your response. The camera does everything it should with the exception of never completing the 

Calibration for the "Invisible Camera". It's mounted on the rear of our 28 foot travel trailer in the location quadrant

that is shown in the installation documentation. The GMC dealer has verified that PN 85118298 is the correct camera for the 2024 Sierra HD's. 

I have also lowered the height of our trailer to 118" based on a known Software issue. I have an appointment with the local GMC Service Dept on 1/27. Hopefully, they will be able to diagnose and resolve.

[bruceb58]

Try calibrating it with a new trailer profile. That's what I had to do to get the trailer TPMS to work. Possibly, similar issue.

 

For me it was the height. Once I lowered it, it calibrated fine.

[donbaldw]

Hi Bruce,

I did try a new trailer profile with the 118" height with no success. I also have an inexpensive TPMS programming

tool that works with the tire sensors on the trailer.

[PBNB]

You could try adjusting the angle of the camera. 

[bruceb58]

9 hours ago, donbaldw said:

Hi Bruce,

I did try a new trailer profile with the 118" height with no success. I also have an inexpensive TPMS programming

tool that works with the tire sensors on the trailer.

Yeah...I use them too but I had to add a new profile to get the TPMS to work.

 

What are your other dimensions for the camera?

[donbaldw]

Quote

I deleted my earlier trailer profile and created a new one from scratch.

Here are the measurements that I entered for our 2 axle conventional travel trailer:

Center of coupler to furthest rear point = 360"

Center of coupler to middle of tires = 222"

Left to right edge of trailer = 96"

Ground to Tallest Point, our trailer is actually 135" Tall, but

will not work if height is above 118", so I entered 115"

Ground to Top of Coupler (trailer attached) = 23"

Center of coupler to trailer front wall ' 35"

Hitch receiver to center of Ball = 10"

Height to my trucks rear tailgate camera (with trailer attached) = 53"

Rear trailer camera is mounted at 57" above the ground centered on the back.

I even tried to adjust the angle of the rear camera, pointing downward (toward bumper)

and upward looking directly horizontal with no success.

It states to drive forward to calibrate but never completes. The Transparent Trailer Icon at the bottom of the screen shows 

a yellow bar above it fully filled in. I've been in contact with my local GMC Service Dept where I purchased my truck and

so far have had no success in resolving. I was told that they were trying to get in touch with TAC but don't know what that means.

[donbaldw]

Update. Took truck to GMC Dealer and the shop foreman performed numerous SW updates to the trailer & video

processing module. I then deleted my trailer profile and recreated from scratch using the measurements above.

I began driving and the calibration still would not complete. I remembered another post where someone mentioned that

nothing foreign could be visible to the rear camera during calibration, so I removed my bumper mounted spare tire and the

calibration began and completed within 2 minutes. In hindsight, a couple of years ago, we had 5th wheel trailer with this 

camera setup and never had an issue with the calibration, probably as a result of the spare tire being mounted underneath.

[PBNB]

I got mine to work on the back of the Airstream. It has a bit of an angle on it due to the shape of the trailer but the calibration worked the first time and it started working. 

 

The only thing I noticed is that after a long drive, the cameras all stopped working. I am not too sure if this is related to the transparent trailer being on?

 

[Dustin Marshall]

On 9/26/2024 at 10:48 PM, Spin542 said:

There is a fault in the trailering sware. The trailer height must be less than 199 inches.

 

He means 119"

[Dustin Marshall]

On 9/12/2023 at 9:26 AM, MTU Alum said:

Try reducing to reducing the measurement of overall height to metric equalivent of 118 inches or less.  If the transparent tile is grayed out, it will never calibrate.  Update the height and then look at camera app and see if you can select the transparent view.  If so, then try to calibrate.

 

 

 

 

THANK YOU!!!

2024 GMC 1500.  Camera System #86584185

Couldn't get the system to calibrate for the transparent trailer.  Would only say "Calibrating..." and then never calibrate.  Zero information as to what the issue was.  Tried adjusting the camera mounting posting, rechecked multiple times.  All good, but still.  System would never calibrate the 'transparent trailer' function.

Reduced my trailer height input from 122" to 118" and boom.  Calibrated fine.

I really wish GM would program a prompt that tells you if you input over 119" the system will never calibrate.  The system height limit is listed as 177" or less.  

Anyway, Thank you very much for the help.