What payments would I be looking at with a 10,500 if I have a trade in value of 2,500-3,500 ?

It depends on what kind of interstate rate they give you and the length of the plan. Word of advice, you're better off with a older lower mileage car than an 07 tahoe with over 200k. New cars use new and often expensive parts, be aware.

10,500 will get you a real nice low mileage trailblazer. or a 02-05 tahoe with way less mileage. Everyone wants a fortune for a 07 just because it's the new bodystyle.