Question about GMC Sierra 1500

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On my 2007 GMC Sierra the check engine light comes on and stays on. It also comes on with the key in the "on"position, and stays on, even if not running. When running the truck runs great. Has 4.3 motor. Has 22000 miles.

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I have the same problem on my '07 gmc 2500. I understand there is a problem with the "cannister filter for emission control of fumes from gas tank" (or something like that). Apparently, it is located near the gas tank which causes it to plug up easily from road dust. The fix is to relocate it with long hoses into the engine compartment area. Since the filter alone is $250 (or so I've been told) with labor it's a $350-400 fix. Supposedly, there is no damage that can be done so I'm just tooling along without worrying about it until I have to put the truck in the shop for something else. Seems there ought to be a recall for this, by government motors won't come out with it.

Posted on Jan 16, 2011

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#PIT4878: Service Park Assist Message / LEDs Stay On Or Inop - keywords B0968 inoperative lamp led light lit module reverse urpa - (Jun 12, 2009) 999999995.gif Subject: Service Park Assist Message/ LED's Stay On or Inop Models: 2007-2009 Chevrolet Silverado 2007-2009 GMC Sierra With RPO UD7

The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
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