2024 Sierra HD Auxiliary Trailer Camera: RPO TRG, Part Numbers, and What VIN Compatibility Really Means

ByWyatt Brooks

Check for RPO TRG Before You Do Anything Else

If your parts department can't find the auxiliary trailer camera for your VIN, the most likely reason is that RPO TRG — Trailer Camera Provisions — wasn't on your truck's original build order. TRG is the wiring harness and receptacle infrastructure the camera physically plugs into. Without it, the camera has nothing to connect to, and GM's parts lookup flags the VIN as incompatible.

TRO (the camera kit itself) was the RPO code available at order time. TRG is the prerequisite, and the two codes weren't always available simultaneously at the start of the 2024 model year's production run. Pull your window sticker or build sheet and look for TRG. If it's not there, the camera won't activate even if you install it.

The Part Number Has Changed

GM originally listed this camera as part number 85118298. That number has since been superseded by 86584185. If you're ordering through a dealer parts counter or an OEM parts retailer, use the current number. Availability and ordering will be cleaner with it.

The kit includes a high-definition camera — 1100 x 880p resolution, 190-degree horizontal field of view — and an integrated 60-foot cable with cable tie-downs. That length covers most conventional trailer setups without needing an extension.

What Transparent Trailer View Actually Does

The headline feature is Transparent Trailer View. When the camera is mounted on the rear of your trailer and the rig is traveling in a straight line, the system composites the trailer camera feed with the truck's built-in rear camera. The result looks like you can see through the trailer to the traffic behind you.

It's genuinely useful for highway merging and for backing into tight spots. One catch: the compositing only works when truck and trailer are aligned. In a turn, the view reverts to conventional modes.

Setup runs through the infotainment system. You enter your trailer's type, length, and height, then drive a short calibration loop at highway speed. Get those inputs right once and the system is largely automatic after that.

The Height Input Bug and GM's Fix

A software defect caused calibration to fail for trailers at or above 119 inches tall. If you've entered your actual trailer height and gotten a message telling you to consult the owner's manual and try again, this was why.

GM released Service Bulletin PIT6060B to address it. The fix is pushed during a dealer service visit once the dealer's system reflects the update. The field workaround that owners found before the bulletin existed: enter 118 inches regardless of actual trailer height. Calibration completes, and all features operate normally afterward.

Fifth Wheel Owners: It's Complicated

Officially, the kit is listed for conventional bumper-pull trailers only. The setup menu does offer a fifth-wheel option, and some owners have gotten the full system working on their fifth wheels. Others hit calibration dead ends. The software version installed on the truck is the deciding variable.

The height bug above was a common culprit for fifth-wheel failures specifically, since large fifth-wheel campers tend to clear 119 inches easily. With PIT6060B applied — or the 118-inch workaround in place — fifth-wheel setups have a better shot. Ask your dealer to confirm the latest calibration software is installed before writing the feature off.

Dealer Install vs. DIY

This is an LPO option, meaning GM designed it for dealer installation rather than factory-fitting. Plenty of owners have self-installed without issues. The cable routes from the truck's trailer receptacle along the trailer frame to a camera mount on the rear. GM specifies mounting the camera horizontally centered on the back of the trailer, approximately 4 inches above where the truck tailgate camera height would land.

That mounting position matters. It feeds directly into the math the Transparent Trailer View algorithm uses to stitch the two camera feeds together. Get it off and the composite image won't line up correctly, even if calibration passes.

Sources


Similar Posts