my check engine ligth went off . knock sensor was bad. replaced both knock sensors cleared check light
took truck to get smogged didnt pass because obd sys wasnt ready for testing . was told need to drive truck at least 50 mi. driven it 120 mi all obd sys are ready exept for secondary air injection sys is there something that needs to be done to get it to be ready..

 

unless its a Calif truck,it does not have sec A.I.R. on it

 

it is a cali truck. the sys. works i tested it on the scanner. but it wont go into the ready status.

 

it will...a gm dealer could command it...a good smog place should be able to....but...yanno...