is it just a general tune up? depending on what you have done in the past 177k, you may want to look into these points as well:
oil/filter, and air filter too.
changing the diff fluid would also be a good thing if it hasn't been done recently.
lube articulation points of the suspension, door hinges, tailgate, hood hinges and latches,
check tire air pressure and tire condition...
new shocks would likely do a world of good if the ones you have haven't been changed in that long.
check the serp belt condition,
check your main electrical grounds and battery/alt condition...
if you haven't changed the OE coolant, that would also be something to look at.
alignment/balance,
check ball joints,
brake pads/shoes and drums/rotors.
check brake fluid and PS fluid levels and condition.
check trans fluid.
its kinda hard to pinpoint what you need to do vs not, you'll know what you've done on it in the past 177k but those are some things you might want to consider.