2004 GMC Envoy P0410 code, secondary air injection system m

2004 GMC ENVOY
11,500 MILES • 6 CYL • AWD • AUTOMATIC
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IMBOTTDAR
  • MEMBER
  • 1 POST
Hello... I was wondering if you could help me out with the P0410 code that came up on my Enjoy. I just spent a painful Sunday replacing the thermostat, drove it for two days, ran the AC and heat and now I have this code. I fired up the truck this morning and the RPMs were going up and down when I engaged the heater. Any help would be great. Thanks!
Sep 1, 2009 at 3:58 AM
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BRIAN 1
  • ✓Experienced Mechanic
  • 1,030 POSTS
p0410 is an air pump code,check the check valve on the side of the block for water intrusion and possible rust,it will prevent the check valve from opening to let air into the exhaust.post back with what you find.
Sep 1, 2009 at 11:27 AM
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