2016-2018 Cadillac CT6 Camera Guide: Fixing Blue Screens & 360 View Issues
This guide covers diagnosing common failures, avoiding critical compatibility mistakes with Surround Vision (UVH) and Rear Camera Mirror (DRZ) systems, and the mandatory calibration required after replacement.
- Compatibility is critical: The camera must match your vehicle's options—Surround Vision (UVH) and a standard mirror (DD8), NOT the video mirror (DRZ).
- Calibration is mandatory after replacement for the 360 View system, requiring a professional scan tool. This makes DIY replacement very difficult.
- Common failure symptoms are a blue/black screen or a 'Service Rear Vision System' message, often caused by a bad camera, coax cable, or connector.
- A used OEM camera is a good value, provided you verify the part number and inspect the lens for moisture damage before purchase.
Critical Compatibility Warning: Match RPO Codes Before You Buy
Warning: The cameras for the 2016-2018 Cadillac CT6 are NOT interchangeable across all models. Failure to verify your vehicle's specific options will result in buying an incompatible part. Before ordering, you must check the Service Parts Identification sticker, usually located in the trunk.
This guide and its associated part numbers are for CT6 models that have:
- UVH - 360-Degree Surround Vision: The vehicle must be equipped with the full, multi-camera surround view system.
- DD8 - Standard Auto-Dimming Rearview Mirror: The vehicle must have the traditional auto-dimming mirror.
These parts are NOT compatible with vehicles that have:
- DRZ - Rear Camera Mirror: This is the video screen mirror that displays a live feed from a separate camera. If your mirror is a screen, these parts will not work. A common issue for DRZ systems is a blue screen, often caused by a loose coaxial cable at the mirror itself, as noted in GM TSB 16-NA-342.
Common Symptoms of a Failing Park Assist Camera
When a park assist camera or its wiring fails, you will likely experience one or more of the following symptoms:
- Black or Blue Screen: The most common symptom is the infotainment display showing a black or blue screen when the vehicle is put into reverse. This indicates a total loss of video signal from the camera.
- "Service Rear Vision System" Message: The driver information center may display an error message, alerting you to a fault within the system.
- Flickering or Distorted Video: The camera image may cut in and out, flicker, or appear grainy and distorted. This often points to a poor electrical connection or a failing camera sensor.
- One Camera View is Missing: In the 360-degree view, one quadrant (e.g., the front, rear, or one side) may be blacked out while the others work. This isolates the problem to a specific camera or its dedicated wiring.
- Frozen Image: The display may show a static, frozen image that does not update as the vehicle moves. The system has a rolling counter to prevent this, so a frozen image points to a significant system fault. 🎬 Watch this guide on resetting a black or frozen camera display.
Known Issues and Technical Service Bulletins (TSBs)
While no safety recalls exist for the camera system itself, GM has issued several TSBs related to camera performance.
- TSB 23-NA-062: This bulletin addresses customer complaints of a blue or black screen when in reverse. It states the cause can be a faulty camera, a bad coaxial video cable, or a corroded connector, often due to vibrations. Technicians are advised to check for Diagnostic Trouble Codes (DTCs) such as B395A, B395B, and B395C to help diagnose the issue.
- TSB 21-NA-091: Some owners may notice a flashing diamond or spot on the camera display. According to GM, this is a normal characteristic of the camera system's operation and not a sign of a fault.
- TSB 18-NA-383: Though primarily for trucks, this bulletin highlights that water intrusion into the camera housing is a common cause of failure, leading to a blue or black screen. Given the camera's exposed location, this is a relevant possibility for the CT6 as well.
Diagnosing the Problem
Before buying a new part, follow these steps to rule out simple fixes:
- Clean the Lens: The cameras are exposed to the elements. Use a soft, damp cloth to gently clean all camera lenses (front, rear, and under side mirrors). A dirty lens can cause a blurry or obscured image.
- Check the Fuse: Consult your owner's manual to find the fuse for the park assist system. A blown fuse will cause a total loss of power. If a new fuse blows immediately, it indicates a short circuit that needs professional diagnosis.
- Inspect Connectors: The most common failure points are often the electrical connections. Check the coaxial cable connectors at the camera and at the Video Processing Module (VPM). Look for any corrosion, bent pins, or loose connections. TSBs indicate that simply reseating a loose connector can sometimes solve the problem.
- Scan for DTCs: Use an OBD2 scanner capable of reading body codes to check for DTCs. Codes like B395A (Rear Camera Signal Circuit) can confirm that the fault lies with a specific camera's circuit.
Buying a Used 2016-2018 CT6 Park Assist Camera
A used OEM camera is an excellent, cost-effective alternative to an expensive new part, especially since aftermarket options often have poor image quality and may not integrate properly. Here's what to look for:
- Verify Compatibility First: This is the most important step. Get the part number from your original camera or confirm the donor vehicle had the exact same options: Surround Vision (UVH) and a standard mirror (DD8), NOT the video mirror (DRZ).
- Identify the Correct Camera: The Surround Vision system uses multiple cameras. Make sure you are buying the correct one for the position you need to replace (front, rear, left mirror, or right mirror). The part numbers differ for each location.
- Inspect the Lens: Look for a clear, unscratched lens. A hazy, yellowed, or cloudy lens indicates the seal has failed and moisture has gotten inside. Do not buy a camera with a damaged lens.
- Check the Housing and Connector: Inspect the plastic housing for cracks. Ensure the electrical connector pins are straight, clean, and free of any green or white corrosion.
- Source from a Reputable Supplier: Purchase from an auto recycler that offers a warranty and has good reviews. A supplier who can provide the VIN of the donor car is ideal, as it allows you to double-check the vehicle's RPO codes.
Pro Tip: The rear camera, part number 84002317, is the most commonly replaced camera in the system due to its location and exposure to the elements.
Replacement Overview and Mandatory Calibration
Physically replacing the rear camera is relatively simple. It involves removing the trunk lid liner, disconnecting the electrical connector, and removing a few 10mm nuts. The front and side mirror cameras are more involved and may require removing the grille or disassembling the mirror housing.
Warning: Calibration Is Not Optional. After replacing any camera that is part of the 360-degree Surround Vision (UVH) system, the Video Processing Module (VPM) must be calibrated. Without this step, the 360 view will be misaligned, parking guidelines may be missing, or the system may not function at all.
This procedure requires a GM-specific diagnostic scan tool (like a GDS2/MDI) to initiate the learn process. The calibration can be:
🎬 Watch this full walkthrough on calibrating a 360-degree camera system.- Dynamic: Requires driving the vehicle on a straight road with clear lane markings at a specific speed (e.g., above 38 mph) until the system learns the new camera's position.
- Static: Requires placing special mats or targets around the vehicle in precise locations and running the procedure in a workshop.
Because of the required special tools, DIY replacement is only feasible if you have access to a professional scan tool and understand the calibration procedure. Otherwise, you will need to have the vehicle towed to a dealer or qualified independent shop after installing the part.
Cost Comparison
| Part/Service | Estimated Cost |
|---|---|
| New OEM Camera (Rear) | $150 - $220 |
| New Aftermarket Camera | $50 - $150 |
| Used OEM Camera | $75 - $150 |
| Shop Labor (Installation) | $110 - $161 |
| Shop Labor (Calibration) | $100 - $200 (Often 1.0-1.5 hours of labor) |
| Total Professional Replacement | $260 - $580 (depending on new vs. used part) |
OEM Part Numbers
Always verify the part number from your specific vehicle before ordering. The following are the most common part numbers for the 2016-2018 CT6 with UVH and without DRZ.
| Position | Part Number | Supersedes |
|---|---|---|
| Rear | 84002317 | 23320851 |
| Front | 23507082 | 23326969 |
Note: The part number 84002318 is often incorrectly associated with this vehicle; it is a part for Briggs & Stratton engines and not a GM camera.
Frequently Asked Questions (FAQ)
Why is my camera screen blue or black?
A blue or black screen is the most common sign of a camera system failure. According to GM Technical Service Bulletin 23-NA-062, this is usually caused by a faulty camera, a damaged coaxial video cable, or a loose/corroded connector. Start by checking connections before assuming the camera itself has failed.
Do I have to calibrate the new camera?
Yes. If your CT6 has the 360-degree Surround Vision system (RPO code UVH), calibration is mandatory after replacing any of the cameras. Failure to do so will result in a misaligned image and disabled parking guidelines. This procedure requires a professional scan tool.
Why is only one of my 360 camera views not working?
If only one section of your surround view is blacked out, it strongly indicates that the problem is isolated to that specific camera or its wiring harness. The rest of the system (the other cameras and the video processing module) is likely functioning correctly. You will need to diagnose and replace that individual camera.
I see a weird flashing diamond on my screen. Is my camera broken?
No. According to GM TSB 21-NA-091, a flashing diamond or spot on the camera display is considered a normal operating characteristic of the system and is not a sign of a malfunction.
Helpful Videos
Technical Specifications
OEM Part Numbers: 84002317 23320851 23507082 23326969
System uses coaxial cables for video signal transmission. Operates as part of the Surround Vision system (RPO UVH) controlled by a Video Processing Module (VPM).
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The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- Cadillac CT6:
- 🎬 Helpful Videos
- 🛍️ Shop This Part
- Critical Compatibility Warning: Match RPO Codes Before You Buy
- Common Symptoms of a Failing Park Assist Camera
- Known Issues and Technical Service Bulletins (TSBs)
- Diagnosing the Problem
- Buying a Used 2016-2018 CT6 Park Assist Camera
- Replacement Overview and Mandatory Calibration
- Cost Comparison
- OEM Part Numbers
- Frequently Asked Questions (FAQ)
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