Bought 2000 buick park ave. ultra & do not know how to adj drivers seat up or down.

SOURCE: power seat on drivers side of 1996 buick park ave.

Chances are one of the motors has gone out. There are 3 motors for each of your power seats. One controls the forward/backward motion, one controls up/down/tilt, and the third controls the reclining seat back. In my '95 model, there is one fuse for the seats under the driver's side dashboard. There should be a diagram inside the fuse panel cover denoting which one controls the seats. Hope that helps!

SOURCE: replace 2000 buick park ave serpentine belt

Firt - study & write down (draw) the belt path,,
and be sure about it..

Then - put a wrench on the nut in the center of the tension pully.. Move the tension pully to loosen the belt.. Pull belt off..

Repeat to put new one on..

Should be pretty easy..

SOURCE: 93 buick park ave Ultra. replacing water pump

Yes. Put a jack under the motor and remove 3 bolts from side of engine and the long center pivot bolt in mount and the 2 bolts that go top down into the frame and loosen the 2 bolts below mount. Jack up the motor until you can separate the mount, leaving the engine side in and removing the frame side. The engine side can be moved out of the way without completely removing.

Testimonial: "answered the question completely and thoroughly!"

SOURCE: where is fuse box in 1999 buick park ave ultra

There are actually three fuse boxes. One is under the back seat.

SOURCE: 1999 Buick Park Ave Ultra Service Engine Light

The code PO742 indicates the torque converter clutch is stuck on.
The torque converter is what connects the engine to the transmission.
It engages and disengages according to signals from the pcm, to aid in
smooth shifting. There are a couple of things you can try. make sure trans. fluid is full, if thats ok check the 20 pin connector, located on left
side of car on top of transmission bell housing. Make sure there's no
corrosion or bent pins. If this clears the code your all set, if not you may
want to ask your mechanic and see what he/she recomends.
Hope this helps.
Good luck