2004 GMC Sierra Engine Light on

Tiny
RAUL MOLINA
  • MEMBER
  • 2004 GMC SIERRA
  • V8
  • 2WD
  • AUTOMATIC
  • 62,000 MILES
My engine light is on and it read two codes.P0449 and P0455. I changed the fuel cap and had the computer reset and the light went off. Later the same day the engine light went back on. I'm not sure what I should do next? PLEASE HELP ME!
Thursday, March 11th, 2010 AT 11:13 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
P0449 Evaporative Emission Control System Vent Valve/Solenoid Circuit Malfunction

P0455 Evaporative Emission Control System Leak Detected (gross leak)

Go to this link:

https://www.2carpros.com/topics/electrical/computer-test
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Friday, March 12th, 2010 AT 2:05 AM

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