Check this link.... informative and funny about shit dealers will pull with you
Be ready to walk away from multiple dealers. Some guys follow sales techniques to the letter, and they are the fun ones to break. If they ask you to sit in their office while they check with the manager, remain standing and look over the folder of other vehicles you are looking at very conspicuously.
A great dick move to sway things your way is to marginalize the sales guy-
If he pulls the "let me ask the so and so" routine, ask if there is a sales manager you can deal with instead of him to make the process easier.
Dont let him run you around.... if you are talking price, do not sway from that until it is hashed out. dont let him pull the whole "what monthly payment are you looking for" bullshit. he will just try to talk you in to a longer loan.
When I bought my last toy(charger srt), I knew what I wanted, I didnt mind shopping around... did so for over a month... and when I found one I wanted I walked in completely prepared.
I told the guy "this is what I am willing to pay. I have my own financing, and My credit union has this warranty for this price... If you beat the rate and the warranty, I will buy form you."
They beat the rate- 4.6% was what I had, they got me 4.0, and whatever bonus they get from that bank.
They beat the warranty in price, coverage, and duration.
The price I pitched did not gouge them too bad, and they gave it to me for the price I asked for, since I gave them the financing and warranty.
At the end, after everything was hashed out THEN i mentioned the trade in.
I told them I wanted at least X amount of dollars- they could not give that to me. No loss, I sold it on craigslist for over that amount.
Bottom line- Know what you want and be prepared to fight for it.
On the decision between ford and chevy.... I have an 06 avalanche that I use to haul my boat and as transport in the winter, 180k on it with no big issues. it did about 25k of that with a big ass plow on the front of it.
I believe the avalanche shares much with the tahoe.
As for ford.... I am horribly biased against them. I have a 450 super duty for work, and have nothing but problems with it. The drive train issues are mostly a result of being loaded to the maximum, so those would not be relevant to you.... But the interior and the electronics are a nightmare. 2 blower fans, 3 fan speed switches, the gauge cluster... all went out within 100k.
Much of it is lack of attention and time spent in the thing, but I am far happier with the fit and finish of the chevy.