ONLY WHEN A PASSENGER IS PRESENT IN THE REAR SEAT AND I TURN IN EITHER DIRECTION OR GO OVER A GRADE CHANGE LIKE AN INTERSECTION, THERE IS A RUBBING OR GRINDING NOISE THAT SEEMS TO BE COMING FROM THE REAR HALF OF THE VEHICLE THAT APPROXIMATES THE REVOLUTION OF THE WHEEL. I AM STUMPED.
It's something in the back wheels making the noise. Not to many parts to make that when rolling. So check the wheel bearing it's super easy. Jack the car rear tires up to clear the ground doing that. Now shake the tire back and forth to feel any movement. If it moves any little it's most likely a bad wheel bearing. Remove Nd replace. If it's rubbing then remove the tire and look for scratches on the caliper rubbing the wheel inside. Or shocks. If you don't know what your doing goto a shop and let them inspect it for you. Also if you have a tire that is wearing tread off the sides that will be a clue which side it is.
Check rear brakes and that also means the emergency brake shoes that are located under the rear brake disk . and also check the rear shocks
SOURCE: Belt routing diagram for 98 Buick Regal GS
if serpentine, then it should be on the fan shroud or the radiator cover...
SOURCE: signal bulb on 2003 buick regal
To change front turn signal –
open the hood; look in back of headlight; two white clips; pull straight up, and then whole headlight comes out including turn signal; it is all one unit; remove rubber cover, then you take bulb out of unit. Mechanism that bulb fits in will need to be turned clockwise (looking from the front) and pulled to get it out of the larger unit holding all lights. Be sure and put rubber cover back on before re-inserting the two white clips.
SOURCE: 1996 buick regal 3.8L. Rear brakes loud thumping
Check for leaks in the brake lines and calipers or brake cylinders. If leaking have it repaired right away its not safe. Change the brake fluid, take the old fluid out add new fluid or have it professionally done.
SOURCE: water on passenger side floor of Buick Regal
U need to clear the AC condensation drain, crawl under the car on the passenger side and near the base of the engine firewall u will find a drain pipe, (about 3/4") clear t and the water will stop going on the passenger floor.
SOURCE: 2002 buick rendezvous groans when turning
The fluid in the versa trak AWD in the rear is old and needs to be drained and refilled. After you drain and refill it, make a bunch of sharp left and right hand turns, then drive it for 10 minutes. Drain and refill it for the second time and problem solved. Use only versa trak fluid available at any GM dealership. There is TSB on this now at the Buick dealership.
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