I'm getting code C0055 on my 09 Chevy 3/4 ton

Question

We have replaced the EBCM and all wheel senders but the code keeps

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coming back we also had the new ebcm reprogrammed but no help

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and the speedometer stops working when the abs and brake light comes on

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Answer 1

The OBD-II computer the dealer uses will tell the code C0055 and two other codes after it (see picture below)

I would check the wheel speed sensor harness connector (you will need to be 12 volts from wire A or 1 and check the ground and continuity of Wire B or 2) (see picture below) all 4 speed sensors should have the same 12 volts when the key is on.