What does C1255 mean on a Chevy?

C1255. EBTCM Internal Malfunction. Applies to Silverado, Sierra, Tahoe, Corvette, Yukon.

What causes C1255 on a Chevy?

Internal EBTCM processor failure Cracked solder joints on the EBTCM relay board Water intrusion into the EBTCM housing Voltage spike from jump-starting or alternator failure Open EBTCM ground causing internal reference errors

How do I fix C1255 on a Chevy?

Verify all EBTCM powers and grounds before condemning it Clear the code and retest to rule out a voltage-spike event Check for applicable GM bulletins on EBTCM replacement Inspect the module connector and housing seal Replace the EBTCM and perform the brake bleed procedure

Code

C1255

EBTCM Internal Malfunction

Category: Chassis
Severity: Chassis Warning Light
Applies to: Silverado, Sierra, Tahoe, Corvette, Yukon
Related: No single generic twin. See OBD Codes List

What it means

C1255. EBTCM Internal Malfunction. This Chevy-enhanced code applies to Silverado, Sierra, Tahoe, Corvette, Yukon.

Findings, check these first

Internal EBTCM processor failure
Cracked solder joints on the EBTCM relay board
Water intrusion into the EBTCM housing
Voltage spike from jump-starting or alternator failure
Open EBTCM ground causing internal reference errors

Standard procedure

Verify all EBTCM powers and grounds before condemning it
Clear the code and retest to rule out a voltage-spike event
Check for applicable GM bulletins on EBTCM replacement
Inspect the module connector and housing seal
Replace the EBTCM and perform the brake bleed procedure

Look up another code

Press / to jump to the box. Chevy-enhanced powertrain, body, chassis and network codes.

Sources and review

Review: no source links are recorded for this entry.

Last updated 2026-09-25.

Report a correction for C1255. Include your vehicle, the issue and a source if you have one.

This fault is part of the GM ABS and StabiliTrak family. The GM ABS and StabiliTrak codes guide covers the check order.