I believe kewlynx is referring to your steering stops. They tend to screech on hard turns b/c the little plastic covers they came w/ from the factory wear down after 20 years. Little different than your bump stops.

But if your truck is an 85 or older 4x4 you shouldn't have this problem.

87 22R PU, 2? body lift, 33? BFG muds, 4.88's, F&R Lock-Rights, Rancho Shocks, EB's Street RV Head w/ 268 Cam, LCE Header, 2" to 2 1/4" exhaust, Flowmaster 50 series, Magnaflow high flow cat, complete Herculined SR5 interior, V6 BB, MC, and calipers.