Just completed DL3 to DQS upgrade. I had made a few attempts at local Chevy dealerships to obtain necessary parts but was dealt all sorts of bad information.
A few private messages to Phil @pgamboa and I was all dialed in. Purchased harness from Phil and mirrors from GM parts supplier he recommended. Phil even went one step further and modified the harness further for future work I have planned.
Harnesses arrived within a couple days, and mirrors shortly after. Followed Phil's youtube install and things went flawlessly. Phil's knowledge of all things related to wiring were extremely helpful. Glad I found this forum and this thread before I made the mistake of going with misinformed dealers.
2017 2500 LTZ process
purchase Phil's harness and OEM DQS mirror
swap out factory harness for Phil's modified harness - simple, follow youtube video.
install DQS mirrors
test and button things up
Everything worked as expected. Power fold, seat memory, power mirrors, turn signals, heated mirrors, all lighting. No error codes.
Love the mirrors, couldn't be happier with the results.
