(1) on or about 10/27/06, alarm system deactivated itself, interior and exterior lights turned on, doors remained locked. (2) on 11/01/06, alarm system activated itself, doors locked themselves. (3) on 11/27/06, vehicle shuttered and went into 'limp' mode which may have caused damage to the transmission. Onstar and dealer retrieved the following error codes: (I) P1626 - theft deterrent fuel enable signal lost, (II) C0276 - traction control not allowed (tcm / ABS), (III) U0100 - lost communications with transmission control module (tcm), (iv) U2105 - lost communication with engine control module (ECM). Between 11/27/06 and 12/21/06, dealer supposedly replaced BCM three times and 3rd new BCM fixed problem. Each new BCM would go to zero (0) and the mileage could not be programmed. During that time the theft deterrent system was deactivated which was unknown to me. Current mileage is incorrect. I believe that the original faulty BCM may have been re-installed and the codes cleared when they were unable to fix the problem. I do not believe that the other none-BCM error codes have been addressed but the dealer forced me to take my vehicle home on 12/21/06.

- Mount Angel, OR, USA