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Ask GM Tech (Cam) Your Own Question
GM Tech (Cam)
GM Tech (Cam), Chevy Technician
Category: Chevy
Satisfied Customers: 15201
Experience:  GM Grand Master Technician 2007. 14 years experience.
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I have a code PO 449 on my 2007 chevy Silverado 1500 LS,

Customer Question

I have a code PO 449 on my 2007 chevy Silverado 1500 LS
JA: Just to clarify, what's the exact code? And have you tried to reset it?
Customer: PO449 I tried to reset no luck
JA: Are you fixing your Silverado 1500 yourself? What have you tried so far?
Customer: First I have a codePO121 so I clean the throttle body now the idle is high and this codePO449 pop up
JA: Anything else you want the mechanic to know before I connect you?
Customer: I'm trying to fix it myself and how can I fix that any suggestion what part to neede
Submitted: 5 months ago.
Category: Chevy
Expert:  Reggie Whiddon replied 5 months ago.

Hi im Reggie thanks for using JustAnswer. Put my years of experience and training to work for you

Expert:  Reggie Whiddon replied 5 months ago.

Hello the code you have indicates a problem with your vent solenoid for the fuel tank. Do you have a scan tool to use for diagnostics

Expert:  Reggie Whiddon replied 5 months ago.

The most common part to fail is the vent solenoid itself although i have had several pcm to be at fault. You can begin by checking to make sure you have voltage at the solenoid with the key on.