GM Service Manual Online
For 1990-2009 cars only

Application

GM SPO Group Number

Exhaust Manifold Hanger

3.704

Exhaust Manifold Pipe

3.609

Exhaust Manifold Pipe Gasket

3.611

Exhaust Muffler (w/Exhaust Pipe and Tailpipe)

3.701

Heated Oxygen Sensor

3.682

Three-Way Catalytic Converter (w/Exhaust Manifold Pipe)

3.685