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2002 GMC Sierra Denali Question: My "4 wheel steer" message lights came on when I was on the freeway. The rpm wou

 

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Jizzo1, Stockton, CA, August 12, 2012, 21:36
 Rookie

Wouldnt climb past 2000 rpm. I gave it some gas but still wouldnt past the 2000 mark. The truck hasonly 123000 miles on it. Is it my tranny thats going out or a bad sensor? Or is it that it has 305/40/22 wheels?

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