So the code is gone and hasnt come back and there are no other codes set?I need to know that before answering your question.

Answered by saturntech9 (expert)
23,179 answers provided

That is correct. The code hasnt come back and no new codes have been set. I am however trying to get the Evap System Monitor to reset. It is showing incomplete. The Chev dealer told me I need to do cold starts and drive cycles to get it to reset.
Thanks Robert C. Lowry

Response from robertlowry
1 question asked

Forgot to ask you what size engine do you have?

Answered by saturntech9 (expert)
23,179 answers provided

4.8 V8

Response from robertlowry
1 question asked

I posted the drive cycle to reset all the monitors.

Answered by saturntech9 (expert)
23,179 answers provided

Does your code reader show if the monitors are ready or complete?The evap one sometimes takes a little while to set the monitors.Are you trying to smog the truck?

Answered by saturntech9 (expert)
23,179 answers provided

Thank you I will try my luck.
Robert C. Lowry

Response from robertlowry
1 question asked

yes I am trying to get it smogged. It has passed the emissions test and was failed on the evap system.

Response from robertlowry
1 question asked

Alright it usually takes a few trys doing the drive cycle its better if you have a scan tool that can check to see if the monitors are set.Let me know how you make out.

Answered by saturntech9 (expert)
23,179 answers provided

my scan tool tells me if my I/M monitors are set. I have the one to go. Thanks I will let you know how I come out.

Response from robertlowry
1 question asked