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DanielJones
DanielJones, ASE Certified Technician
Category: GM
Satisfied Customers: 498
Experience:  GM A Tech at Straub Buick GMC
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I have a failure of a secondary air pump on 2004 GMC Envoy.

Customer Question

I have a failure of a secondary air pump on 2004 GMC Envoy. Is this part necessary to replace?
Submitted: 1 year ago.
Category: GM
Expert:  DanielJones replied 1 year ago.

Yes , without the air pump working it will affect the emissions and fail inspection.

Secondary Air Injection (AIR) System Description

The Secondary Air Injection (AIR) System reduces exhaust emissions following initial engine start up. This occurs when the engine Start-up coolant temperature is between 3–50°C (37–122°F) and the intake air temperature (IAT) is more than 1°C (32°F). The AIR pump will operate until Closed Loop operation is achieved.

Expert:  DanielJones replied 1 year ago.
Hi, Just wanted to get an update on how you made out with vehicle.
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