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the payment will go up on it because you don't have enough equity built up in the new one for it to help you,it might be a good idea to keep the one you have right now,at least for a year or two,the way it is right now you,d be paying more ,its hard to figure a percentage because there's no way of knowing what they would charge you,good luck with it.

You're going to take a beating trading in the trailblazer meaning you will owe more than it's worth. The negative equity will be rolled into your new car. Stop trading in your cars! Be sure to look at your total financing not just your payments, a dealer can lower your payment by raising the term of the loan. You can be paying on that car for up to 7-8 years, not a good idea. DON'T DO IT!

My mom had an '06 Kia Spectra and traded it in for an '07 Kia Optima, interest went up to %15, but refinanced it at a credit union for 6.9% if you buy it, the interest WILL go up because you have negative equity on the '06. If you refinance it at your local credit union, you won't pay more than 7% interest. That is what I reccomend.

Your interest rate is going to be determined by your credit score and the current rates. I don't have enough info to say weather your rates will go up, #1 we don't know what your current rate is and we don't know your credit score. Are you up side down? owe more on the car than its worth, or did you put down a large enough down payment to build up equity? Did you may larger than required payments? There are just to many unknown variables in order to be fair in my consultation.