How Do I Check The Secondary Air Pump On A 2005 Chevy Trailblazer?


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Remove the pump from the bracket by removing the 3 bolts and unplugging 2 plugs. Take the pump over to a work bench and connect a positive and a negative Jumper wire to the 2 terminals. ( Look at the plug on the body harness to figure out what wire is ground ( Black wire ) If the pump is good it will turn and blow air. If it's no good,...

* Be sure to hold the pump firmly as it will give a little kick when it starts turning !

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