What it means
The EBCM sees an issue with the brake-pedal switch input (implausible, missing, or stuck signal). This input is used by ABS/TCS/ESC logic (and often cruise control), so faults can disable stability/traction features. Charm+1
Symptoms
- ABS/ESC/StabiliTrak warnings; cruise control may be inoperative. Silverado Sierra
Common causes
- Misadjusted or failed brake-light switch; open/short in switch wiring; poor EBCM power/ground. Corvette Forum
Diagnostic notes / fixes
- Verify switch adjustment and output (both circuits, if dual-contact); check fuses/relays.
- Repair wiring/connector issues; replace the switch if faulty; reverify EBCM sees correct state changes. Charm