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Engine error code PO446, any help?
Hello all, my check engine light came on and it came up with error code PO446. Anyone had this code and what did you do? 2004 GMC Yukon XL, 213,000 miles, burns no oil, runs great, but has been a little long on the start up recently.- dolarmaker
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- Replies: 1
- Forum: Engine & Drivetrain
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