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In a 2006 Cadillac DTS, there's a secondary air injection pump located right beyond the exhaust manifold and before the catalytic converter. This pump helps filter carbon from your vehicle's emissions by drawing in fresh air from outside and pushing it through the exhaust system. If the pump malfunctions, it will require replacement. Parts for this replacement typically cost between $40 and $138. If you hire a professional mechanic to replace it, expect to pay an additional $56 to $248 for labor.
In order to reach the secondary air injection pump on a 2006 Cadillac DTS, you will need to take off the front air deflector first. This will allow you to access the secondary air injection pump.