working on a 2019 colorado and could use some advice

[RcCustem]

Im using Smelecom DP3 and it will read correctly but when I try to write it gives me a 0074 failed access error
Ive tried unhooking the battery and tried running and off and even unhooked the battery and tried with the key off and Im not getting something right

thank you very much for any help

[RcCustem]

where are the miles stored ??? in cluster or bcm or everywhere?

[clusters]

BCM...................

[RcCustem]

"The odometer programming is integrated as part of the BCM programming procedure. It is not a stand-alone event."
whats this mean?its a notation on the up to 2020 colorado

[clusters]

Just means dealers cannot do odometer corrections, they never could except on a new unit.

That truck may need the dash and BCM like the older ones, 2019 I'm not sure.