C0222 CHEVROLET - Missing Right Front Speed Signal
C0281 - Brake Switch Circuit:
C0237 CHEVROLET - Erratic Rear Speed Signal
C0265 Brake Control Module EBCM
C0267 ABS Pump
C0269 Traction control mechanical fault.
if all these codes are active then there could be a problem with the ABS module or the connection to the module, water etc has gotten in to the plug and has corroded the connections. failing this it could just need a reboot. ignition on to number 2 then off and with in 60 seconds remove the negative (best to undo the nut first but not remove the connector) when the connection is off the battery then leave for 5 min then remove the plug on the ABS and inspect the plug and the plug fitting in the ABS unit. any green or none shiny connections clean them with a bit of emery cloth, if water has been getting it then replace the rubber seal. if the connection look fine replace the mhe module on the abs you can buy these separate, if not then you will need to replace the hole unit. but dont do that just yet as the reboot could sort this, with the battery being disconnected leave of for over an hour then plug back on ( remember you will need to the codes for the radio so keep this at hand when you want to use the radio). if reboot has worked the abs light should go off if not reset using the code reader and see if they come back on the reader.
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