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U0121 Diagnostic Trouble Code Discussion for June 2011

Lost Communication With EBCM

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Trouble Ticket Help Requests for DTC U0121
Help Request Posted
2007 Chevrolet Tahoe LT 5.3L No Start VIN: 1GNEK13067
U0121: Lost Communication With Anti-Lock Brake System ABS Control Module. Hi, we have a Tahoe here that has turned into a real problem child! Our customer went to start it one day & it wouldn't crank so they tried to jump it. Still no crank! They then had it towed to our local Chevy dealer because they thought they had some warr...
June 07, 2011