GM codes making you crazy? Try a new MDI cable

This TSB applies to 2010-2012 Buick LaCrosse, 2010-2012 Cadillac SRX, 2010-2012 Chevy Camaro and Equinox, 2010-2012 GMC Terrain, 2011-2012 Buick Regal, 2011-2012 Chevy Camaro convertible and 2011-2012 Chevy Cruze and Volt.

Owners of any of the listed vehicles may comment on a Service Stability/Traction message and, if equipped with a 2.4L engine with electric steering, a Service Steering message.

During diagnosis, the technician may find a DTC C0710 with symptom 71. The C0710/71 also can be found in the PSCM (electrical power steering module).

Condition 1: When servicing the SAS (steering angle sensor) using GDS a technician may have difficulties in learning the SAS using GDS. The display screen may just continue to read waiting or may display an error message.

Condition 2: Upon rechecking for codes, the technician may find one or more DTCs (U0074, U0077, U180D, U0293, U0126, U0125, C0186 and/or C0196. These DTCs will not clear.


  1. For learning SAS, check for diagnostic package updates for GDS. Think of this just like the Tech 2 versions needing periodic updates.
  2. Upon checking for codes, you may find the afore-mentioned U and C codes are set, and will not clear after diagnosing the chassis bus, and the cause of the fault is not found. TAC has been involved with a few TAC cases and found the cause to be a MDI cable-to-DLC issue. Try a different MDI cable and perform the SAS learn following the published service information and clear the communication codes.
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