Question about 2004 Chevrolet TrailBlazer
C0055 is for rear speed sensor, mounted on top of rear end. Unplug and remove 10mm bolt, remove. It's a magnet, any metal shavings? Change sensor and fluid. C0201 is ABS module fault. Under. Truck under drivers seat is the pump and module. Unplug it and check for moisture and corrosion. Clean and add DIEELECTRIC gel. Clear codes and retest. Might need another module. You don't need to remove pump just unbolt module from pump. Module was not common on this vehicle
Posted on Nov 21, 2013
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Posted on Jan 02, 2017
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Feb 04, 2016 | Chevrolet Cars & Trucks
Jun 30, 2015 | 2004 Chevrolet Chevrolet TrailBlazer EXT
The IPC detects a loss of serial data communication with the EBCM
Traction Control System (TCS)
When drive wheel slip is noted while the brake is not applied, the EBCM will enter traction control mode.
The EBCM uses a 5-volt pulse-width modulated (PWM) signal to request the PCM to reduce the amount of torque to the drive wheels. The PCM reduces torque to the drive wheels by retarding spark timing and by commanding the throttle actuator control. The PCM uses a 5-volt PWM signal in order to report to the EBCM the amount of torque delivered to the drive wheels.
You would need a factory grade scan tool to check data PID's - parameter identification , all the sensors work within a specific voltage range 1- 5 volts an you can see this on a good scan tool !
The Traction control is part of the ABS system an there a several DTC possible
DTC B0827 DTC B0828 DTC B2745 DTC C0035 DTC C0035 or C0040 DTC C0040 DTC C0055 DTC C0110 DTC C0191 DTC C0201 DTC C0220-C0229 DTC C0240 or P0856 DTC C0244 or P1689 DTC C0245 DTC C0267 or C0268 and C067 or C068 DTC C0550 DTC C0899 DTC C0900
You best bet is to take it to a qualified repair shop !
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