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Old 07-02-2023, 08:36 PM   #4
hatzie
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Join Date: Oct 2008
Location: Wentworth, NH
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Re: P0446 code?!?! 😡😡😡

Quote:
Originally Posted by wazzabie View Post
Do you use the updated evap part gm provides?

https://downloads.innova.com/tsb-fil...00/2380966.pdf

#02-06-04-037F: DTC P0446 (Restricted/Blocked
EVAP Vent Path) Set, Check Engine Light On (Replace
Evaporative Emission (EVAP) Vent Valve Solenoid
Assembly and Add/Relocate Filter Box Using Service
Kit) - (Aug 5, 2009)

I just fixed this problem. I installed the updated evap part, a new gm fuel pump and the PO446 code was gone.
It depends on where you're driving.
The updated kit is intended for dirt road drivers. I primarily drive it on pavement so I use the less expensive original style.
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RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials...Please include at least the year and model in your threads. It'll be easier to answer your questions.
And please let us know if and how your repairs were successful.
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