Backup Camera Issue

[Pdfisherman]

Hello,  I have a 2014 GMC Sierra 1500. It has 130k miles. I just bought it. When I put the vehicle in reverse, the screen turns grey. The lines appear on the grey screen, and they turn as I turn the wheel. No picture, just lines on a grey screen. After a few seconds, the screen stays grey but the lines disappear and a message comes up that says “Service Rear Vision System”. I am wondering where I should start.  Are there common problems that lead to this?  I’ve searched for answers, but most people describe a blue screen. Anyone have experience with this or know where to start?  I did unplug and clean the connection by the spare tire, but nothing changed. Thanks in advance!

Edited November 25, 2020 by Pdfisherman

[DAVID HARROWER]

On my 2016 Silverado, the screen was not clear.  Tried cleaning lense but no better.  I replaced the camera and fine now.

[Pdfisherman]

I replaced the camera today, and it did not change. Still a gray screen with the distance lines and “Service rear vision system”. Any idea what to try now?

[JimCost2014]

1 hour ago, Pdfisherman said:

I replaced the camera today, and it did not change. Still a gray screen with the distance lines and “Service rear vision system”. Any idea what to try now?

Thinking you may have a HMI module that is failing. Maybe check the connections on it, located behind your glove boxes in the dash.

[rjl361]

Had the same problem with my 15 Silverado and I just fixed it yesterday. If your reverse lights were out like mine, check your reverse lamp fuse in the engine bay (33). Saw it was blown so I replaced and my camera turned back on. Hope this helps.

[Luis alfaro]

Has anyone been able to find the solution to this? I had to remove my bed to do some frame work and now I have a grey screen with the guide lines. I've tried everything in this thread but no luck, thank you in advance for any suggestions 

[Cwel]

I had this problem intermittently and it drove me crazy.  I believe that the electronic harness for the camera connects with the bed light on the cab (in addition to backup lights).  The bed light seal erodes over time and water gets in there.  Its an easy fix, but I did notice water stains on the ceiling of the cab right under the light.  When it rained, the camera would work off and on as it dried.  Since I fixed the light, I have not had a problem.  By the way, I did have it looked at by the dealership and they could not explain what was causing the issue, but of course the camera operated correctly upon their inspection.