Question about 2002 GMC Sierra

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I have a 2002 GMC 2500hd 8.1L t1000 Allison. I pull an 8800lb 5th camping wheel trailer. Every time I stop for a short period of time and return to the highway. The check eng light comes on at about 30mph. The code is for mass air sensor. I have replaced it, but still have the same problem. This only happens when I am towing. The dealer can't figure it out. Is this a common problem. Thanks, Terry

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Posted on Jul 19, 2009

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