Enjoy the trip down as well as up. Go slow, the additional 10 minutes to your travel time should not be a big deal. It's better to be late than never! I have a V10 with Tow/Haul button and you it all the time. Texas to Colorado and 2 passes. I just go slow up and down. Give dog peanut butter smeared on a paper plate and causes their ears to pop due to the swallowing. Everyone is happy and safe. We usually drink a bottle of water and chew a tums for each 2500' in elevation we gain to stop the altitude headaches.