Where is the secondary air injection pump on a 2001 Cadillac eldorado?

The secondary air injection (SAI) pump on a 2001 Cadillac Eldorado is located on the passenger side of the engine compartment, near the front. It's often somewhat tucked away and might be partially obscured by other components. You'll likely find it near the exhaust manifolds or catalytic converter.

However, the exact location can vary slightly depending on the specific engine (Northstar or other) in your Eldorado. A repair manual specific to your vehicle's year and engine will be the most accurate resource for pinpointing its location. You can also consult online diagrams or forums dedicated to the 2001 Cadillac Eldorado. Pictures found through a search may help you visually identify it.