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Discussion Starter #1
The truck belongs to my cousin's girlfriend. She just got it and it was a totaled truck that she legally bought for cheap at an auction and had it repaired to inspection specs.

Its an 05 Z71 with the 5.3 and the cel is on and while idleing, it is reving up and down. Its not reving high, just not a constant rpm at idle. Any ideas what may be causeing it or what to check out?
 

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Discussion Starter #2
bump................
 

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Look for the Idle air control on the throttle body. I know when it goes you will get irratic idle
You could also take it to an autoparts store and have them pull the codes off the computer.
 

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Discussion Starter #4
ok. I wonder if the edge evo i have for my truck would plug into hers and read the codes? the obd port is shaped the same.
 

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Run a code check and let us know what you find. We can help from there.
 

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Discussion Starter #6
are the obd ports the same, as far as plugging up to pull codes?
 
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