DTC C0550 "Electronic Control Unit (ECU) Performance
C0550 "Electronic Control Unit (ECU) Performance" MH ($29) "Electronic Brake Control Module (EBCM)"
"Service braking system" message on the DIC, abs + brake lights on the dash. PCM went reduced power, only 40% throttle per EFI.
Never saw this code or message/lights before, but truck has gone REP before with no codes set. First time I got to scan it.
Dealer? Warranty up in 5k miles. Have stock pcm for this. Code reset immediately after clearing and restarting. SO it should do the same if I swap to factory pcm? I want the dealer to see this code if they will fix it.
06 GMC 1500 CC 4X4 VortecMax LQ9, 70e, 14b 4.10, 285's. Tunes, Tint, and Diamond Plate.
Modded stock airbox, Modded stock muffler BLACKBEAR TUNE
Last edited by lq9crew; 01-24-2009 at 11:04 PM.
Reason: info needed