Chevrolet U1610
If the entire bus is impacted (multiple ECUs with comm loss). • Do not replace the front camera. • Diagnose the CAN Bus 2 issue
Quick answer
For the verified Chevrolet applications, U1610 is documented in PIT6503/PIT6503A/PIT6503B as a possible CAN Bus 2 loss-of-communication DTC when multiple ECUs are affected. If the entire bus is impacted, do not replace the B174W Front View Camera module; diagnose the CAN Bus 2 issue.
This page separates verified manufacturer/regulator evidence from supporting material. Unsupported causes, repairs or safety conclusions are not guessed.
Watch Videos
Relevant videos play here without leaving this diagnostic page.
No sufficiently relevant embeddable video has been accepted for this diagnostic yet.
Videos are supporting material and never override OEM or regulator evidence.
1. What does U1610 mean?
For the verified Chevrolet applications, U1610 is documented in PIT6503/PIT6503A/PIT6503B as a possible CAN Bus 2 loss-of-communication DTC when multiple ECUs are affected. If the entire bus is impacted, do not replace the B174W Front View Camera module; diagnose the CAN Bus 2 issue.
2. Technical explanation
The verified manufacturer communications state that the K56 Serial Data Gateway Module may set loss-of-communication DTCs for other ECUs on CAN Bus 2, including U1610. The documented decision point is whether the entire bus is impacted, meaning multiple ECUs have communication loss. In that condition, the communications specifically direct diagnosis of the CAN Bus 2 issue rather than replacement of the front camera.
3. What system is affected?
CAN Bus 2 serial-data communications. The verified communications also reference the K56 Serial Data Gateway Module and the B174W Front View Camera module.
4. How serious is this code?
Not yet established by verified evidence.
5. Symptoms you may notice
- Multiple ECUs may have loss-of-communication DTCs on CAN Bus 2.
- The K56 Serial Data Gateway Module may set loss-of-communication DTCs against other ECUs on CAN Bus 2, including U1610.
6. Possible causes
- A CAN Bus 2 issue, when the entire bus is impacted and multiple ECUs have communication loss.
- Further root cause is not yet established by verified evidence.
7. Can I still drive the vehicle?
Not yet established by verified evidence.
8. Can I charge the vehicle?
Not yet established by verified evidence.
9. What you can safely do
- Have the vehicle diagnosed by a qualified Chevrolet service facility using the applicable manufacturer diagnostic information.
- Do not authorize replacement of the B174W Front View Camera module solely because U1610 is present when multiple ECUs have communication loss across the entire bus.
10. Step-by-step troubleshooting
- Confirm whether multiple ECUs have loss-of-communication conditions on CAN Bus 2.
- If the entire bus is impacted, diagnose the CAN Bus 2 issue.
- Do not replace the B174W Front View Camera module in the documented entire-bus/multiple-ECU communication-loss condition.
- Specific test steps, wiring checks, and component-level repair procedures are not established by the supplied verified evidence.
11. When to contact service
Contact a Chevrolet service facility for diagnosis if U1610 is present, particularly when multiple ECUs show communication-loss faults on CAN Bus 2.
12. What the service center may check
- Check whether the K56 Serial Data Gateway Module is setting loss-of-communication DTCs against other CAN Bus 2 ECUs.
- Determine whether the entire CAN Bus 2 network is impacted, indicated by multiple ECUs with communication loss.
- Diagnose the CAN Bus 2 issue when the entire bus is impacted.
- Avoid replacing the B174W Front View Camera module in the documented entire-bus/multiple-ECU communication-loss condition.
13. Possible repair or resolution
- The verified communications direct CAN Bus 2 diagnosis when multiple ECUs across the entire bus have communication loss.
- Replacement of the B174W Front View Camera module is specifically not directed for that documented condition.
- The final repair is not yet established by verified evidence.
14. Affected vehicles
- Chevrolet Blazer · 2024–2026 · US
- Chevrolet Equinox · 2024–2026 · US
- Chevrolet Equinox · 2025–2026 · US
15. Related TSBs / service bulletins
- PIT6503, published April 14, 2026: identifies U1610 among CAN Bus 2 loss-of-communication DTCs and directs CAN Bus 2 diagnosis rather than front-camera replacement when the entire bus is impacted.
- PIT6503A, published June 3, 2026: identifies U1610 among CAN Bus 2 loss-of-communication DTCs and directs CAN Bus 2 diagnosis rather than front-camera replacement when the entire bus is impacted.
- PIT6503B, published June 17, 2026: identifies U1610 among CAN Bus 2 loss-of-communication DTCs and directs CAN Bus 2 diagnosis rather than front-camera replacement when the entire bus is impacted.
16. Recall information
- Not yet established by verified evidence.
17. Official manufacturer information
Verified official manufacturer communications are available through NHTSA: PIT6503 (https://static.nhtsa.gov/odi/tsbs/2026/MC-11031514-0001.pdf), PIT6503A (https://static.nhtsa.gov/odi/tsbs/2026/MC-11033726-0001.pdf), and PIT6503B (https://static.nhtsa.gov/odi/tsbs/2026/MC-11034014-0001.pdf). Verified applicability: 2024-2026 Chevrolet Blazer, US; 2024-2026 Chevrolet Equinox, US. The supplied applicability evidence includes a duplicate 2025-2026 Chevrolet Equinox entry.
19. Frequently asked questions
What does U1610 indicate in the verified Chevrolet communications?
U1610 is listed as a loss-of-communication DTC that the K56 Serial Data Gateway Module may set against other ECUs on CAN Bus 2.
Should the front camera be replaced for U1610?
No, not when the entire bus is impacted and multiple ECUs have communication loss. The verified communications specifically say not to replace the B174W Front View Camera module in that condition.
What should be diagnosed when multiple ECUs have communication loss?
The verified communications direct diagnosis of the CAN Bus 2 issue.
Is it safe to drive or charge with U1610?
Not yet established by verified evidence.