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GM U1010 Code – TCM Data Missing
Limited
Safe to drive :
GM vehicles only
Applies only to :
Not applicable to :
This explanation does NOT apply to other brands.
High
Severity level :
When Does This Code Appear on the Vehicles
GM U1010 appears when BCM reports missing or incorrect data from TCM.
What This Code means on the Vehicles
Transmission Control Module data missing on Class 2 network.
Why This is different from a generic OBD2 Code
Standard OBD-II scanners cannot detect TCM-specific U codes.
Common Situations That Trigger This Code
Wiring issues; TCM failure; Module reprogramming errors.
What Will NOT Fix This Code
Ignoring transmission communication fault.
How to Clear This Code on Vehicles
Inspect TCM and wiring; clear code using Tech2/OEM diagnostic tool.
Related Manufacturer Specific Codes
GM U1000; GM U1040
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