Evaporative purge system not ready

[way2much_01]

Goto www.tunefiledepot.com, look under stock tunes, look under Chevrolet and GMC...

I didn't see one for 2002 Sierra, but try the 2002 Silvarado (of the same engine size).

Thanks for all the help I appreciate it... I noticed that the silverado tune has the egr not supported also. Should I enable them or should I be looking for a California truck tune?

[joecar]

I'm starting to think that maybe it didn't come with EGR.

[way2much_01]

I'm starting to think that maybe it didn't come with EGR.

or maybe that tune came from a truck out of state and egr wasn't on the truck?