I purchased a 2018 Yukon Denali with the Ultimate package in December 2017. The GMC literature says that with this package you get an additional 9 months of XM radio beyond the normal 3 month trial. When I contacted XM to initiate my trial, they knew nothing about the 9 month additional. The dealer is telling me that I need to call XM at the end of the 3 month trial and explain it to them and they should add the 9 months at that time. This doesn't sound right to me.
Has anyone else on this board purchased a 2018 with the Ultimate package?
Has anyone else on this board purchased a 2018 with the Ultimate package?