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Thread: Another FAILED Smog Test

  1. #1
    SoCAPS Member
    Join Date
    05/29/2007
    Posts
    14

    Another FAILED Smog Test

    The reason was Code P0683 GPCM Problem.

    I need to take it in for a diagnostic test and repair.

    Anyone know a professional truck shop around the San Gabriel Valley area ???

    Or am I stuck with the dealers...........
    2001 PSD Super Duty F350 XLT SRW Shorty 4SPD. K&N Air Filter, Line-X, Mag Hytec Tranny Pan & Diff. Cover. BD-ebrake, Elec. Trans. cooler. 3-gauges/A pillar.
    Firestone Air bags on rear axle.
    Michelin XPS LT 235/85R 16E
    2003 Alpenlite 32ft. Augusta 5th. Wheel
    1 Chocolate Lab

  2. #2
    SoCAPS Member optx002's Avatar
    Join Date
    10/21/2008
    Posts
    366
    gpcm is the glow plug control module. Its probably the module that is not working correctly. Mine went out and replaced it. Could also be the glow plugs.
    2003 Ford f250 CC LB 7.3L
    Vegistroke Kit
    Lifted 9.5" w/ 37 Toyo MTs
    JW Trans

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