Ecm

[sprayedenali]

Does anyone know where the ECM would be located on a 08 sierra denali?

[mcfarlnd]

maybe the engine bay. follow wires to a weird box.

[ff_jeff]

Isnt the TCM on the tranny, and the ecm in the engine bay?
thanx allen

[farmtruc]

The ECM is in the same location as the previous models, just below where the battery used to be, on the older models.
The TCM is in the trans for this truck.