Better than GMID deals

[jhawk]

Just wondering if any of you have went in with a GMID but got a better price from the dealer without using it? Hoping to get mine within a month and trying to get the best possible deal I can. After researching it more I'll probably buy rather than doing the SmartBuy and go with the Adventure Package. The one I am looking at is:

-ADVENTURE PACKAGE
-TRAILERING CONVENIENCE PKG.
-ROOF RAIL AIRBAG SYSTEM W/ ROLLOVER SENSOR
-MONSOON SYSTEM
-TRAILER HITCH AND WIRING HARNESS
-AUTOMATIC TRANS
-CHROME APPEARANCE PACKAGE
-CHROME TUBULAR ASSIST STEPS

MSRP: $35,075.00
GMID: $32,169.44

My trade in will be a 2003 Impala in good condition with about 47,000 miles and I owe about $10,000 on it. Do you think the GMID discount and the difference in what they'll give me for trade vs. what I owe will basically cancel each other out?

Thanks to everyone who replies I've learned a lot on here.