Hey guys, happy New Year.

I have a buddy that has a 2007 Trailblazer that has come stock with the 5.3 V8.

He has added:

The RPO's I added are
AAB - Memory Driver convenience package (seats, mirrors)
DL2 - O/S Mirror
KA1 - Heated seats
U2k - Digital Audio

Mechanically this was all plug and play. The wire harnesses had all the necessary wiring already there. I believe that is because I have the higher end LT model

My next mod is to ditch the 4x4 and add the SS AWD transfer case.

To make these options function, he had to add a VIN from an AWD SS Trailblazer.

Question. How does he retain these RPO functions while using the original VIN for his Trailblazer?

I was thinking he could use the VCI # system via Techlink and his local dealership, but they are not familiar with doing this.
Je currently has deleted DOD as well, and this has been taken care of via the PCM calibration.

Aside from using the GM techline, is there a way via aftermarket tuning suites to accomplish this ?

He is located in the USA abd is will to pay any sort of incurred fees. Any friendly techs out there?

Thanks Gents, let me know if you need more info.

peace
Hog