Hello every one, I know this has been discussed before, but I'm trying to get my dealer to do the latest upgrade on my 2003 h2 computer and they seem hesitant to do so  Have any one done it on a 2003? And if you have, have it worked better for you? Any improvements on performance? Please let me know. Thanks
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"2003 Sage green LUX, wrapped around brush guard with off road lamps, roof mounted SMA light bar, AirAid Jr. kit, Delphi Touchscreen Navigation Radio with a 6 CD changer and more! Also a member of the HOPE (Hummer Owners Prepared for Emergencies) pro
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