I recently bought this truck from my neighbor, and to get my tags I have to pass emissions, but I've failed because I havnt completed the drive cycle. I have done all of the gm requirements ( coast from 55 to 20 w/o brakes, idle, ect.) and the heat o2/catalyst thing still isn't ready. I've driven it 300 miles. Is there anyway to check the the percentage of drive cycle completed with a scanner? Anyway around this?

 

no. which monitors are not complete?

 

The hrt (oxygen sensor heater) monitor is the only one.

 

o2 monitors run continuously as soon as they enter closed loop operation. No dtc are setting, correct?