Diagnostic Aids
WARNING: This page is about a different car, the 2000 Pontiac Firebird, 2000 Chevrolet Corvette, and 2000 Chevrolet Camaro. However, it is still accessible from the selected car via links, so may be relevant.
Before replacing any components, check for misrouted harness, rubbed-through wire insulation, wire broken inside insulation, kinked or damaged vacuum hoses or for physical damage to system components.