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International Automotive Technicians Network
Re: 2002 Yukon XL P0174, P0171
Posted to Technical Discussion Forum on 1/27/2006

This is idleing at 16 in Hg?

Seems low to me, you still around 5k Ft there? Dang just looked it up and you are. You high altitude guys make it hard on us flatlanders with MAP and Baro readings.

Check the MAP for being skewed or Baro off.

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