Thanks. I did double check with the dealer and you're correct; 3.42. When we purchased the truck it had 245/70/17 tires.
When the tires were needing replacing we went with an OEM wheel and 275/55/20 tires.
Even though the circumference is only 4.4" more I'm really surprised how lazy the truck is now. Acceleration is noticeably less and power seems down. Maybe I'll need to look into 3:73 or 4:10 gears?
Scott