i just replaced the rear struts in my park avenue w/ the factory (AC Delco) replacements. the ride is now way too stiff - unbeleivably harsh. the install seemd to go just fine, but obviously something is not correct. any ideas? the control module looks ok, the striker arm is in the correct position (driver's side rear) - the car feels as though the struts are filled to capacity w/ air, yet the ride height looks to be normal. appreciate any help. thanks.

i cant remember for sure which side its on but im pretty sure on the passenger side rear control arm, theres a little ball cup that attaches to a senser. maybe check that. may have popped loose during install?