Reference meaning
What does this code mean?
The wording below belongs to the named make and communication. Match the complete code, reporting module, model year and engine before applying it.
A code identifies a detected condition, not a part that must automatically be replaced.
Narrow by vehicle
A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
Before replacing a part
Record codes and freeze-frame data. Check battery condition, related codes and visible wiring or hose damage. Follow the vehicle's diagnostic procedure and test results before replacing parts.
Scan worksheet →Manufacturer communications
13Original wording in English
CADILLAC, CHEVROLET, GMC
This Preliminary information communicates an issue with an SES MIL and BCM DTC U1962 and ECM P00FF set. Dealers are to reprogram the BCM with the lastest calibrations.
CHEVROLET
Certain vehicles listed above may have a condition in which the Body Control Module (BCM) may not properly clear the DTC U1962 (Unable to Authenticate Serial Data Message). Dealers are to reprogram the body control module.
CHEVROLET
This Preliminary information communicates a concern of a false DTC: U1962 setting in the BCM due to a software Anomaly and to ignore this DTC at this time.
CHEVROLET
Service Updated - Certain vehicles listed above may have a condition in which the Body Control Module (BCM) may not properly clear the DTC U1962 (Unable to Authenticate Serial Data Message). Dealers are to reprogram the body control module.
Check vehicle applicability
17A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| BrightDrop | 600 ELCV ↗ | 2024 |
| BrightDrop | ZEVO 400 ↗ | 2024 |
| BrightDrop | ZEVO 600 ↗ | 2024 |
| Cadillac | CT4 ↗ | 2020 |
| Cadillac | CT5 ↗ | 2020 |
| Cadillac | ESCALADE ↗ | 2025 |
| Cadillac | ESCALADE ESV ↗ | 2025 |
| Cadillac | REDUNDANT LYRIQ ↗ | 2023 |
Can I keep driving?
A code alone cannot establish whether driving is safe. A flashing malfunction light, severe shaking, overheating, oil-pressure warning or loss of braking or steering needs prompt attention. Stop in a safe place and seek assistance when control or engine safety is affected. Follow the vehicle handbook.