How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask DanielJones Your Own Question
DanielJones, ASE Certified Technician
Category: GM
Satisfied Customers: 505
Experience:  GM A Tech at Straub Buick GMC
Type Your GM Question Here...
DanielJones is online now
A new question is answered every 9 seconds

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: 2 years ago.
Category: GM
Expert:  DanielJones replied 2 years 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 2 years ago.
Hi, Just wanted to get an update on how you made out with vehicle.
If you need more help, please use the "Reply" tab to continue our conversation - I'm happy to answer follow-up questions.
If you have no follow-ups at this time, please remember to Rate My Service.
Thank you for posting your question.
Your business is very valuable to us.
Thank You
***** *****