1999 - 2006 (GMT800) Section for all discussion related to the 1999-2006 Chevrolet and GMC trucks.

2004 fuel/ o2 issues??

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Nov 14, 2017 | 8:14 PM

#11

tech2

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Joined: Mar 2011

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the computer does compensate for altitude. the map sensor provides atmospheric pressure data...it updates at key on engine off and at wot.

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