Symptom: The GMDAA will unlock the doors but is unable to lock the doors on Chevrolet Trailblazer or GMC Envoy vehicles without factory keyless entry.

Cause: The vehicles data lock codes differ from the generic GM vehicles and also differs between Canadian and US manufactured Trailblazer and Envoy.

Solution: The GMDAA v2.14 software update has addressed this issue for the Canadian manufactured Trailblazer and Envoy. If the bypass kit is v2.13 and older contact us to request an exchange. For Trailblazers and Envoy's manufactured in the US contact your distributor and request the special modified GMDAA (Trailblazer). This modified GMDAA will only function with the new US manufactured Trailblazer and Envoy vehicles and does not function with the remaining GM vehicles which it normally supports.