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Thread: cos3 multiple not readies

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    Junior Member 64camino's Avatar
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    Oct 2007
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    Default cos3 multiple not readies

    Trying to get the car through emissions, but it keeps coming back O2, O2 heater, evap emissions, and sec air sys not ready. Any ideas? thanks.
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    05 Silverado rcsb. forged 6.0,KBRacing front mount, TC-76, tuned with efi live.

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