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silveradorob
New User
Jun 20, 2005, 3:23 PM
Post #1 of 2
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FFault FaulFault code
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I have 2003 Silverado 2500HD. Have OBD fault codes PO449 and PO455. I've been told its a emissions valve malfunction.
I have no manual and am new to this truck so not to familliar with locatios of components.
Also have an intermittent squeal that increases with engine speed, At first I thought it was the brake pad squealers but still hear it at a complete stop. Serpentine belt idler??
Any help would be appreciated
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gmjohn
New User
Jul 26, 2005, 7:29 PM
Post #2 of 2
(6976 views)
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Re: FFault FaulFault code
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Silveradorob
I did an 03 recently with code po455 and it was the evap vent solonoid valve.The valve is located underneath by the fuel filler hose over the fuel tank, about $25.00 from gm.Only way to know for sure is with a scanner and a smoke machine,but this seems to be a common problem on these trucks.
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