99 Suburban ready codes

[j cAT]

Originally Posted by gorent

I do have a code reader and can clear codes, however I never get any fault codes that turn on "MIL" lights. I have been trying to get the ready monitors (5) to move from Not Ready to Ready. I have not had a fault code on over a year now. I hope this mileage thing works out. I will let you know how it does and at what mileage.

keep the fuel tank 1/3 to 3/4 full.. this will get those evap codes done ! after 100 miles you should have 3 monitors in the ready state.. those other monitors take a bit more time..

[gorent]

Originally Posted by gorent

Well that may explain why the 5 monitors did not clear in over 724 miles and 20+ cold starts! Everytime I was told to disconnect cables from battery as told I was resetting mileage recorder to zero. I will be trying this 300-500 mile plan and see what happens. Thank you again!

Well.... 456 miles and 16 cold starts so far and 5 monitors have not moved off of incomplete status. $146.00 worth of gas and a lot of rides to no where. I hope something changes soon

[j cAT]

Originally Posted by gorent

Well.... 456 miles and 16 cold starts so far and 5 monitors have not moved off of incomplete status. $146.00 worth of gas and a lot of rides to no where. I hope something changes soon

with that then you must go to a GM dealership and have them re-flash your PCM.

if they cannot re-flash the PCM then this should explain why its not ready.

the ready state is a function of the PCM programing..could be damaged.

post back whats up this is weird stuff..