Here are some of my thoughts...
Inspect: ( Other than possibly being ready for brake pads, everything else will probably be fine on this INSPECT list.)
axle & suspension
Brake calipers, pads, rotors
Drive shaft boots
Exhaust system
Front suspension ball joints
Propeller shaft
Steering gear and linkage
Steering linkage ball joints
Multipoint inspection
Services:
Oil and filter change - Do it yourself with synthetic for $35... Or any shop could do dino oil for near the same price.
BG MOA oil conditioner - What?? Why do you need oil conditioner if you regularly change your oil?
Rotate tires - If you bought your tires at Discount Tire (and many other shops) that service is free
BG brake fluid exchange - I didn't touch my brake fluid till 85K (I am at 88K now). Whole system flush was $80
Reset Maintenance Light - uh... free.
Install BG 44K fuel conditioner - why the hell do you need fuel conditioner if you run premium and keep your filter clean?
Road test - uh....free.
Cabin filter/air filter - you can do this yourself for $20
Set tire PSI - uh...free.
Replacements:
differential oil - I have RWD. Did my differential at 60K.(posted about it here and I still gag when I remember the smell) it was just as easy as an oil change. I need to do it again.
Engine coolant - again, this takes you minutes and is relatively cheap to refill with new good coolant. (my radiator developed a pinhole leak at about 60K or so)
Drive belts - probably fine. Mine are still fine, but will probably change soon since I am getting close to 90K.
Radiator cap - if it's not broken, .....
Transfer case oil - ? I have a RWD
Wiper blades - GMAFB! $20 for good ones and about 2 minutes to change.
Transmission fluid - it is sealed. I wouldn't mess with this and the manual says it doesn't need to be messed with other than driving in extreme conditions.
$1600 or $1200 less 10%, both are too much.