halp

Cleared all my codes with a scanner after repair of my EBTCM. How long and what type of driving do I have to do before OBD2 is ready for emission testing.

Smoken1

Hop on the interstate for 30 mins or so take your scanner and see if they are all set

QCVette

I was looking for this also.

I looked in the FSM for my '99 and it only describes that a list of systems have to complete their tests, but I couldn't find what type of driving was needed to do that.

Generally, I have heard that with a variety of driving it can be reset in a short period, but unsure of how quickly. 15 minutes/miles? 30? I am not sure.

On another forum I found someone said that with 15 key cycles they would reset. His comment was that he would do that in his driveway before going to the I/M station for testing. I find no reference at all to that in the FSM, so I doubt if it works, but as easy as it is to try, I would try it to see if it works. (EDIT: I tried the 15 key cycles on my Buick and it did not work. I still doubt that it will on our C5's)

Check it with at scanner that gives the I/M status to make sure, before going for emissions testing.

Good luck.

halp

Found this info at <http://www.obdii.com/drivecycle.html>.
Says it's for all GM vehicles. Takes you through a scenario of speeding up then coasting back down as well as running AC and rear defroster.

QCVette

Good site. That shows exactly what is needed.

Thanks.