I just purchased a '17 Suburban LT and I am looking at doing the dl8 to dl3 mirror upgrade and I am in contact with cmatt who has everything I need short of the mirrors to make the conversion. He stated that everything is very straight forward as long as I have the memory package. The truck has memory seats so I assume that means that I have the memory package but the truck does not have the reverse tilt mirror option in settings which all trucks with the memory option are supposed to have. I am so confused at this point, even reading the manual it looks like I should have the reverse tilt as long as I have memory seats. I know most people turn off the reverse tilt but I loved it on my '07 that I just traded in and I also want to make sure that my power fold swap will go smoothly. Does anyone know whether I actually have the memory option and why I have memory seats but no reverse tilt? Is there an RPO code to look for or a way to add the option through software on the computer? Thanks in advance.