One problem related to engine belts and pulleys has been reported for the 1996 Buick Park Avenue. The most recently reported issues are listed below.
Coolant leak lead to repair of upper intake manifold gasket. Repairs caused water pump to fail, and serpent belt tensioner to fail. Further repairs were done, 500 km later, oil pump failed and engine was destroyed. Buick 3. 8l series ii v-6.