My experience with the service department of the Isuzu dealership in Gaithersburg, MD was not good. I would not recommend them to anyone.
It's great that you've found one willing to do their job. Good luck with the new tranny. I would recommend bringing in some AMSoil synthetic ATF and have them fill it up at the dealership when they do the install.
Calmini Cone Air Filter, PowerVault PV2 Muffler, OME Trooper Springs, Rancho RS9000X Shocks, 285/75R16 Nitto Grappler AT's, Pioneer DEH P8000R In-Dash CD, Amps and Drivers Built by Orion, Wires and Fuse Blocks by KnuKonceptz, Vibration Damping by BQuiet, Alarm System featuring Auto Start and Remote Windows, Yakima LoadWarrior w/Full Size Spare, Debadged/Custom Titanium Grill Logo, Tint (5% Rear / 20% Front), Steel Braided Brake Lines, G2 Painted Calipers