How to drop a 3.8 engine frpm a 99 buick park avenue

SOURCE: 1997 Buick Park Avenue

This is the diagram but you should have factory belt diagram sticker is still somewhere under the hood
If not:
http://www.mvreader.com/multiview/dayco/zoom.php?zoom_item=C0001D&l=n&catalog=auto&category=
To replace the serpentine belt on a V6 3800 you must jack up the motor and remove a motor mount. You must then use a breaker bar with a socket (13/64") and pull it toward the front of the car to release the belt tensioner. Put the new belt on, tighten it, put the mount back on, and lower the jack.
Driving without a belt can cause the motor to overheat, will cut power steering, and will not recharge the battery, so you should probably get a tow
Good Luck

SOURCE: 1991 buick park avenue will not run fuel pump is good and replaced the fuel filter

http://www.fixya.com/cars/t1810766-1991_buick_park_avenue_stop_running

Check out this link. It may help you with your problem.

SOURCE: 2000 Buick Park Avenue Service engine soon light

need to take car somewhere to have the code read with a scanner,try parts stores first some will do it for free if not the dealers have them

SOURCE: My O2 sensor is bad on my buick park avenue. Will

first of all bad O2 sensor wont hurt your car but will cause gas millage to go way down and could cause misfires and for the engine to run poorly
Secondly there probley at least 2 02 sensors on your car one before converter (also called up stream O2 sensor) and one after converter (also called down stream O2 sensor)

ok next things u need to find out
1. how many senors u have could be any where from 1 to 4 (Will explain more in a minute)

2. which sensor is bad your fault code should tell u this
under code description should say O2 sensor bank 1 sensor 1 or 02 bank 1 sensor 2 or bank 2 sensor 2 bank 2 sensor 2 (bank 1 is side of motor where #1 spark plug is bank 2 is other side of motor)

Ok now time to fiugure out how many sensors u have jack up car look at exhaust look to see how many converters u have they should be located close to engine compartment should be at least one maybe two if my memory serves me right there only one on your car if it is only 1 that narrows down the amount of sensors to 1 to 3 now that you found your converter follow the pipes up to engine look at both pipes should be at least one senor somewhere if there two there but one in each pipe
ok now we know how many up stream sensors u have ok now look back at converter within a foot of pipe coming out of converter there should be a sensor if there is one not all cars have this one

I'm sorry if i confused u but just dont want you changeing wrong sensor and having to buy another one if you dont have to cause they arent the cheapist things in the world but well worth fixing because money you save in gas will pay for sensor in no time