Shop Buick Century Secondary Air Injection Pump (Right). 4.2 LITER. All Models; 4.2L. Air Injection Emission, SYSTEM, Repair - OEM Buick Part # 12574379

Secondary Air Injection Pump. Smog Pump.
An emissions component, that is part of the Secondary Air Injection system, which is responsible for Pumping clean Air into the vehicle's exhaust stream to promote a cleaner and more complete burn before the fumes exit the tailpipe.

Secondary Air Injection Pump

Fits Bravada, Envoy, Envoy XL, Envoy XUV, Rainier, Trailblazer, Trailblazer EXT

4.2 LITER. All Models; 4.2L.
Air Injection System Air Pump - Repair or Replace
A failed air injection pump or secondary air pump will often have no noticeable symptoms beyond a check engine light, but it does cause your to operate inefficiently and produce higher emissions. Our technicians have access to manufacturer-approved repair processes and genuine parts.