I have 2003 Yukon XL since new- now between starts it will change transmission settings- 2w to 4L to All wheel to neutral-
I have changed the ecm unit and the switch on the dash - it has been reprogrammed - no performance issues- just trying to figure it out
I have changed the ecm unit and the switch on the dash - it has been reprogrammed - no performance issues- just trying to figure it out