ECM Reprogram while at dealer - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

craigk777 · 04-30-2012, 10:59 AM

I took my 2011 V6 in today for a state inspection. The service manager told me that there was a reprogram needed for my ECM. Anyone know what this update was for or what it fixed??????

bmorecam · 04-30-2012, 11:14 AM

I know one of the thing it fix is cold start misfire also known as cat warm up cycle misfire. I finally talk to my service manager the other day and expressed my concern about the cat warm up cycle problems some cars are having and he told me that tons of 2009-2011 cars from traverse to camaro are having this abnormality and GM came out with couple different revision of this reflash since 2010. He said it has nothing to do with anything other than it's a simple ECU glitch and that some cars had to have this reflash as soon as they left the dealer lot. Too bad I can't get this reflash done. I guess I will just have my cat warm up cycle turned off.

nyrfan · 04-30-2012, 11:15 AM

Most likely for the AC compressor (not turning off) issue. Also, you may notice your OLM will now 0 out at right around 5K miles.

craigk777 · 04-30-2012, 11:19 AM

Quote:

Originally Posted by nyrfan

Most likely for the AC compressor (not turning off) issue. Also, you may notice your OLM will now 0 out at right around 5K miles.

OLM????

jeepguy_1980 · 04-30-2012, 11:23 AM

Oil Life Monitor.

bmorecam · 04-30-2012, 11:26 AM

Quote:

Originally Posted by nyrfan

Most likely for the AC compressor (not turning off) issue. Also, you may notice your OLM will now 0 out at right around 5K miles.

I forgot about that. There's a recall for that right?

nyrfan · 04-30-2012, 11:28 AM

Quote:

Originally Posted by craigk777

OLM????

Depending on when you LLT was manufactured, you may notice a difference. Because of the LLT oil issue the OLM is now adjusted to be much more conservative. IMO (and I do not have confirmation of this) it's now based strictly on 5K miles, not a calculation.

Quote:

Originally Posted by jeepguy_1980

Oil Life Monitor.

This

KMPrenger · 04-30-2012, 11:29 AM

Here is kind of a newb question...I should know the answer to this but I gotta ask. Sorry to go off track.

Now I know if I take my car to the dealer for any work that might involve the ECM I should go back to stock. What if I took there for some basic routine maintenance and they decide to do some computer updates like the cold start issue update, but I don't put the stock tune back in place.

Would their update re-write over my custom tune, or just add to it?

I'm guessing it would overwrite.....in which case they I'd have to send this back to Vince to have him add the custom tune back in....is that correct?

nyrfan · 04-30-2012, 11:29 AM

Quote:

Originally Posted by bmorecam

I forgot about that. There's a recall for that right?

Yes on the compressor.

craigk777 · 04-30-2012, 12:03 PM

Thanks for the info. I was wondering because it seems to run a little better. Maybe just wishful thinking.

bmorecam · 04-30-2012, 12:17 PM

keith..it will overwrite most likely, but depending on what it is that they change trifecta's tune could also overwrite dealer's reflash. I am trying to find out exactly what it is that's readjusted. No luck yet.

04-30-2012, 10:59 AM	#1
craigk777 Drives: 2013 Summit White 2SS/RS Join Date: Nov 2009 Location: Pa Posts: 340	ECM Reprogram while at dealer I took my 2011 V6 in today for a state inspection. The service manager told me that there was a reprogram needed for my ECM. Anyone know what this update was for or what it fixed??????

04-30-2012, 11:15 AM	#3
nyrfan Let's go Rangers! Drives: 13' AGM 2SS/RS L99 Join Date: Jun 2011 Location: Orlando, FL Posts: 10,742 View My Garage	Most likely for the AC compressor (not turning off) issue. Also, you may notice your OLM will now 0 out at right around 5K miles. __________________ Soprano 4/1/00-6/14/11, Gone but NEVER forgotten! FSP tuned: 377/389

04-30-2012, 11:29 AM	#8
KMPrenger Drives: 16 Camaro SS, 15 Colorado Join Date: May 2009 Location: Jefferson City, Missouri Posts: 13,967	Here is kind of a newb question...I should know the answer to this but I gotta ask. Sorry to go off track. Now I know if I take my car to the dealer for any work that might involve the ECM I should go back to stock. What if I took there for some basic routine maintenance and they decide to do some computer updates like the cold start issue update, but I don't put the stock tune back in place. Would their update re-write over my custom tune, or just add to it? I'm guessing it would overwrite.....in which case they I'd have to send this back to Vince to have him add the custom tune back in....is that correct? __________________ 2016 Camaro 1SS - 8-speed - NPP - Black bowties 2010 Camaro 1LT V6 (Sold. I will miss her!)

04-30-2012, 11:14 AM	#2
bmorecam Account Suspended Drives: jealous vendors mad!! HAHA!! Join Date: Jan 2011 Location: CYBERGMONSTER@GMAIL.COM Posts: 3,658 View My Garage	I know one of the thing it fix is cold start misfire also known as cat warm up cycle misfire. I finally talk to my service manager the other day and expressed my concern about the cat warm up cycle problems some cars are having and he told me that tons of 2009-2011 cars from traverse to camaro are having this abnormality and GM came out with couple different revision of this reflash since 2010. He said it has nothing to do with anything other than it's a simple ECU glitch and that some cars had to have this reflash as soon as they left the dealer lot. Too bad I can't get this reflash done. I guess I will just have my cat warm up cycle turned off.

04-30-2012, 11:23 AM	#5
jeepguy_1980 Drives: 2010 Camaro 1SS Join Date: May 2010 Location: Newport News Posts: 1,310 View My Garage	Oil Life Monitor.

04-30-2012, 12:03 PM	#10
craigk777 Drives: 2013 Summit White 2SS/RS Join Date: Nov 2009 Location: Pa Posts: 340	Thanks for the info. I was wondering because it seems to run a little better. Maybe just wishful thinking.

04-30-2012, 12:17 PM	#11
bmorecam Account Suspended Drives: jealous vendors mad!! HAHA!! Join Date: Jan 2011 Location: CYBERGMONSTER@GMAIL.COM Posts: 3,658 View My Garage	keith..it will overwrite most likely, but depending on what it is that they change trifecta's tune could also overwrite dealer's reflash. I am trying to find out exactly what it is that's readjusted. No luck yet.