Just to clear some ?'s of mine up, directly from the source. I sent this to GM

"Dear Tech Support~
Concerning a LS1 powered F-Body with OBDII...if the SES light comes on a picks up a code, for example, rich bank 1 or 2, and then goes off, and the computer stores the troubles codes...........now the SES light goes off, however the trouble codes are still stored in the ECM. My question: If trouble codes are stored in the ECM, but the SES light goes out, does the computer de-tune, or put itself in some kind of "limp" mode until the codes are cleared? Also, after you clear the stored codes, how long does it take the LS1 to re-learn the engine, and gain maximum output? Thanks, I and many other F-Body owner's appreciate your answer and time with this!!!

Joe"

Awaiting a response

 

Ah crap, I just realized that this may not be the right section, mod feel free to move this, sorry again

 

Joe,

Going to move this to "Computer Diagnostics" as I feel you'll get more response over there.

Good luck.

-Mindgame

 

The response:

"Dear Mr. ********,

Good Evening! Thank you for contacting the Chevrolet Customer Assistance Center. I appreciate you taking the time to write us in regards to information on your LS1 powered F-Body with OBD11.

I apologize, but we at the Customer Assistance Center rely on our dealerships who have technical knowledge and expertise relating to your specific vehicle. I have contacted a Chevrolet dealership that is open at this time and spoke to the service department.

In regards to your question, "If trouble codes are stored in the ECM, but the SES light goes out, does the computer de-tune, or put itself in some kind of "limp" mode until the codes are cleared?" the service consultant that I spoke with advised me that the vehicle goes back to full operation and stores those codes in history. The service consultant stated that the vehicle would turn the light back on if the failure reoccurs.

In regards to your second question, "After you clear the stored codes, how long does it take the LS1 to re-learn the engine, and gain maximum output?" the service consultant inquired what year vehicle you were working with. I could not advise him of this information. The service consultant stated that it would probably be best if you contacted your local Chevrolet Dealership Service Department to ask these questions as they will be in the best position to assist you.

If you should need to contact us in the future, simply reply to this message with your service request number, 1-254795745, or call our Chevrolet Customer Assistance Center at 1-800-222-1020. Customer Relationship Managers are available Monday through Friday from 8:00 a.m. to 11:00 p.m., Eastern Time.

Again, thank you for contacting Chevrolet.

Sincerely,

Tiffany Abbott
Customer Relationship Manager
Chevrolet Customer Assistance Center"

 

When you clear codes the computer doesn't have to relearn anything.

All that's doing is exactly that - clearing the code, nothing else.

It'd only have to relearn everything if you disconnect the battery.

 

Wow! I'm amazed GM actually responded with a reasonable answer. I am such a cynic and believe that they would deliver some wimpy answer that essentially says, "Bring your checkbook and pink slip..."

That was a pretty good answer. What is the email you sent that to?

 

To the "contact us" email on their website