The idler arm or pitman arm may wear causing looseness in the steering. When this occurs the front suspension will not be able to be aligned correctly.Google+
Car Problem Reports
Chevrolet Caprice Idler/Pitman Arm May Wear and Cause Looseness in Steering
Chevrolet Caprice Problem
Average Mileage: 97,700 mi (42,500 mi - 152,000 mi)
Visitor, 1992 Chevrolet Caprice, 152,000 mi
Pitman Arm worn and can not find replacement
Visitor, 1993 Chevrolet Caprice, 125,000 mi
Now can't find a replacement part! Discontinued!
Visitor, 1995 Chevrolet Caprice, 83,000 mi
I've always thought the steering was rather vague since buying the car with 60,000 miles, but when it was due for its most recent safety inspection, it failed due to a worn idler arm. The inspecting technician showed me the extra play and looseness present in the arm. The part was reasonably priced and the repair was completed that day.