possibly a t-50 torx head bit on a ratchet that's what i had to use on my 95 lesabre
IT IS NOT A TORX BIT IT IS A 3/8 ALLEN
If you get a star wrench you wont have to worry as they are standard and one of the four will fit.
Use a wrench and place it on the large nut. Push the wrench like you are loosening the nut. The tensioner will rotate and remove pressure from your belt.
The 1990 uses a t50. The 89 is probably the same.
jack up the tire and then remove the bolts that is holding the calipers and then remove the hose and the calipers will come off. you will need to bleed the brakes when you replace everything back together.
,
A sharp knife. to pop it. jk.idk
Remove belt, balancer bolt and get a balancer puller to remove the balancer. Unbolt and unplug sensor to replace it. An air impact wrench that is strong will get the bolt loose.
Parking brake? Service brakes? Pedal dropping? Bad Master cylinder? ABS Module?
I had to use an Allen wrench, it wasnt a socket however my lesabre is a 93
its under the back seat
Remove the positive cable from your 1997 Buick LeSabre battery. Remove the alternator belt. Remove the alternator wiring harness. Remove the alternator retaining bolts. Reverse the process to install the new alternator.
Mine had drum in rear Mine had drum in rear