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Ask GM Tech (Cam) Your Own Question
GM Tech (Cam)
GM Tech (Cam), GMC Mechanic
Category: GM
Satisfied Customers: 29427
Experience:  GM Grand Master Technician 2007. 14 years experience.
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How to replace evap vent solenoid/valve error code po449

Resolved Question:

How to replace evap vent solenoid/valve error code po449
Submitted: 7 years ago.
Category: GM
Expert:  GM Tech (Cam) replied 7 years ago.

Welcome to Just Answer and thank you for asking your question. I look forward to helping you fix your vehicle.

 

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The solenoid is mounted on the back side of the tank. From under the truck you can remove the valve wiring connector, remove the valve from the tank and remove the lines from the valve and canister. If there is no hose on the new valve, then use 5/8 heater hose to run the filter for the valve beside the transmission.

Customer: replied 7 years ago.
this is a 2007 suburban not truck.--does the tank have to be dropped? what does the valve look like?
Expert:  GM Tech (Cam) replied 7 years ago.

No the tank does not have to be dropped, but this being a utility does change this a bit, but not much.

  • Remove the spare tire and wheel assembly.
    Object Number:(NNN) NNN-NNNN Size: SH

  • Raise and support the vehicle.
  • Disconnect the chassis wiring harness electrical connector (1) from the EVAP canister vent solenoid.
    Object Number:(NNN) NNN-NNNN Size: SH

  • Disconnect the EVAP canister vent solenoid quick connect fitting (1) from the EVAP canister.
  • Disconnect the fuel fill pipe EVAP line quick connect fitting (3) from the vent solenoid. Object Number:(NNN) NNN-NNNN Size: SH

  • Disengage the retainer (1) securing the EVAP canister vent solenoid to the bracket.
  • Remove the EVAP canister vent solenoid.
  • GM Tech (Cam) and 3 other GM Specialists are ready to help you