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There is no "easiest way" to remove the pads. You need to unbolt the calipers, (bolts are on the inboard side surrounded by small rubber boots) retract the caliper pistons and remove/replace pads,(make note if any pads are marked R&L) put it back together. Make sure that slides that caliper bolts pass through move freely. Don't use calipers with torn rubber dust boots and don't pinch boot between pad and piston when you reassemble. Unless you open the hydraulic system you do not need to bleed. Before attempting to drive, depress pedal a few times to restore proper caliper adjustment.
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A proper front-end inspection would be needed to determine if indeed the vibration or shimmy you are having is from a loose/worn front-end components.It is not unheard of to received defective "new" rotors.
Your Buick has front disc brakes...and rear drum brakes...the usual concern is the front pads as they are used more...these are the easiest pads to replace...as you only need to remove the caliper from the rotor with 2 bolts to lift off...Be sure to push the piston all the way back into the caliper to install new pads...rotors are pop offs too...The rear drum is different...the brake shoes are held on with clips and springs...try keeping one of the shoe assemblies intact while you switch out the other shoes...be sure to inspect the rear wheel brake cylinders for possible leaking...usually an oil build up inside the brake drum...these are inexpensive and should be switched out on a 93 Buick...:) Hope this helps.
Those are special calipers. The piston cannot be just compressed back into the caliper - it needs to be turned as it is compressed or you can ruin the caliper.There is a kit you can rent from AutoZone or many independent auto parts stores that will perform both functions at the same time. Block fron wheels and raise vehicle passenger side. Remove wheel. The caliper is on the top rear side of the assembly you're looking at.There are 2 long bolts you'll need to remove to take the caliper off the vehicle. Don't remove the brake line or open the bleeder screw ( either of these moves will add to your work!! ) Insert a large flat blade screwdriver in between the rotor and outboard brake pad and pry away from the vehicle slightly to release the pads from the rotor. Slide caliper upwards and towards the back of the vehicle to separate from rotor. The pads will come in a full set ( all 4 pads for both side of the rear ) . Look at your replacement pads and determine if they have a retainer clip holding them in place or a compression clip. Remove outboard pad first then inboard. Match old pads to replacement pads. Inspect rotor for grooves and irregular surfaces - if any grooves or irregularity present, remove rotor and take to an auto parts store for refinishing.Compress caliper piston with kit and allow 5 minutes for pressure to bleed back into the master cylinder.install rotor if removed and wipe surfaces with brake clean. Install inboard then outboard pad and place caliper on rotor, then mount to vehicle. Install wheel, repeat procedure for drivers side, then PUMP BRAKE PEDAL 5 TIMES BEFORE TRYING TO DRIVE VEHICLE to set pads on rotors.
The humming noise could be a wheel bearing, as for the clunking noise does it relate to the brakes at all? If it is with the brakes could be caliper/pad clip maybe the problem. If not brake related possibly it could be a motor mount.
Thanks for your help. The information was very helpful.
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