DUDE!
I work on the drilling drilling rigs, so 4x4 is requirement for me, 180 days a year!
I just bought a 'new' work truck. I got a 2005 Tundra TRD fully loaded for $11,000 cash (also paid for in cash, by the company I own). Yes, it is a deduction, but the less you spend in your business, the more that is available to PAY YOURSELF!!
My truck is KICK ASS. Not so good on gas, but again, that is being highly subsidized by my clients. I'm willing to bet though, that you spend more on gas total, driving around in yours, even though it is slightly smaller.
Sell both of those, immediately!