Between the pics posted here and the TireRack website, it looks like Jen's truck has Bridgestone Dueler HT. TR reviews rate them fairly poor in snow, nearly the same as the Dueler HP on my wife's CR-V. I can confirm that there's a whole lot better tires out there for snow. Never stuck, but a whole lot of slipping and sliding in 4" or so of fresh falling snow before the plow trucks came out. Downhill braking was white-knuckle inspiring. Go slow and easy, you should be alright. Start saving up for those Grapplers
Yeah, those are the ones we have on our new Acadia. It did fine this week when I was out in the deep stuff, not great but fine. Just take it easy, and things will be fine.
They are the factory tires that were on when I bought the truck. I am hoping I can get that extra money to have the Nitto's put on before my trip to Yosemite.