Buy 1990 Buick Century Leaf Spring Assembly. Code 8AU, 9AU. Code 9AU, 8AU. Silverado, Sierra Code, Suspension - OEM Buick Part # 86808681 (84625974)

Leaf Spring Assembly.
A complete Leaf Spring Assembly containing the master Leaf Spring and graduated Leaf Springs.

Leaf Spring

Fits Sierra 1500, Sierra 1500 Limited, Silverado

Code 8AU, 9AU. Code 9AU, 8AU. Silverado, Sierra; Suspension Code; w/o Mono Leaf; 9AU, 8AU.
Suspension Leaf Spring - Repair or Replace
Your leaf springs are not especially prone to failure, but excessive rust can make them more prone to failure. Contact your local Buick service department to have the suspension system in your 1990 Buick Century evaluated and have the leaf springs replaced if necessary.