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oldhillian

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  • Location
    SC
  • Drives
    2015 Sierra 1500 Double Cab

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  1. I purchased the 8" screen upgrade that comes with a programmed HMI from MVI-Autospa. The camera was ordered from eBay, the seller was Suburban Chevrolet. Just search for GM# 22803702 and you should find one easily for around $100-110.
  2. Finally got my camera working this weekend on my 2015 Sierra WT! The problem I found was that there was no power being sent to the camera when in reverse. All I had to do was splice into the reverse lights and connect that to the white camera wire at pin 1 and it worked. All of the other wiring was fine so this may be a common issue with all WT models without a factory backup camera.
  3. No luck yet.. I did verify that the camera works by connecting it to another GM truck, so I'm not sure where to go from here. I have a diagram so the next thing I'll check is the voltage and ground at the connection under the bed and hope to find something there.
  4. Funny you should mention to check the plug because I actually did have it connected to the wrong one before. Unfortunately, even after I swapped it to the correct port the camera still doesn't show on the screen. I also checked the fuses and they are fine. Guess I'll be checking the wiring with a meter next.
  5. So I ordered and installed the 8" screen and HMI from MVI which is working well.. I also installed a GM backup camera after verifying the wiring on my 2015 Sierra WT. Everything looked good with the wiring, but the camera does NOT appear on the screen when in reverse, and it gives a message to service vision system. I'm hoping that there may be a missing or blown fuse, or possibly just a bad camera, but I haven't had time to troubleshoot anything yet.
  6. I've been told by Carl at Digital Dash Solutions that the 2015 Sierra WT (base model) does NOT have the needed connection wiring inside the dash?.. I have not yet confirmed this, but I will be looking into it since I have a WT that I want to add the backup camera too as well. Previously, I had spoken to someone at the local GMC dealer about flashing my stock HMI for a backup camera and they quoted me around $150 to do it, but did not mention any wiring issues. A wiring diagram should make this easier to determine if anyone knows where to find a WT specific diagram. Looking under my truck, I found the CA connection port with the filler plug inside, and it also had the pins inside the port after removing the plug. Maybe someone else knows more about the WT model?
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