[SSRider]

Originally Posted by jpgoins

Good morning Camaroheads!
A couple of things to consider concerning lack of power. First and foremost, there needs to be consideration for the powertrain warranty. 100,000 miles. Obviously, there are many technically knowledgable people on this site. And for those of you that have been involved with other GM vehicles over the last 4 to 5 years, you are woefully familiar to TORQUE MANAGEMENT. This is GM's built in protection program against excessive warranty claims concerning powertrain. A very good friend of mine has an 08 Silverado Vortec Max. This thing is just sad. An L76 6.0 should be able to rip the hides off from a standstill. Nope. Barely a chirp, even in tow/haul with TCS/VSC off. Rediculous. So, in for a reputable dyno tune. Spins through first and into second, with the 1/2 shift causing a scary tail wag. Downside: if he takes it in with that dyno tune, GM has built in a history burn that a GM tech can see that the update is not a match with the GM calibration. He was smart and bought a blank ECM. TCM is a different story, but with the torque management brought close to zero, he chose not to modify TCM programming. Besides, to swap out the TCM in a 6 speed, you would have to pull the valve body! (internal).
Anyhow, a proper tune should really wake up those L99/6As. Do yourself a favor though, buy a blank ECM.
Second, and I don't know if this is just a fluke, but when my dad's came in from Area 51, the MAF was unplugged. His had 37 miles on it. I wonder if there is a MAF malfunction? I dont have a matrix for specs on MAF input for the L99/LS3, but a good reputable performance shop ought to.
Thanks for reading my 2 cents. I really am into GM's new tech, and I should be! I am a GM ASEP instructor for San Jacinto College, training a new generation of GM Technicians. Kinda makes me a little obsessive. Not to mention all my cells have little GM stamps on them.
Oh, one other thing, a little secret for those interested in displaying instantaneous fuel economy. (courtesy of Camaro5 member dstairs; Thanks Richard) While on the average fuel economy display, hold the CLR/RESET button until it beeps. It is then in instantaneous mode.
Keep tearing it up, my fellow Camaronites! Increase your carbon footprint, one burnout at a time!

Thanks for the great info

I have a question. If I understand your post correctly you are saying that unlike the C5 LS1/FBody LS1 (PCM only) that the 2010 LS3's have both an ECM and TCM and that the TCM is programable? I was expecting the LS3 to have a PCM. All of the threads I have read indicate that the tranny and engine programming are done in one spot. So I assumed that tuning takes place in the PCM. Also in regard to the MAF, didn't that unplugged MAF throw a code? Why would you want the programing tables, just to verify that they are correct in the stock ECM programming? Changing those MAF tables can reak havoc on your tune unless you are adjusting for a different MAF Thanks for your indulgence. I want to learn as much as I am able about tuning the LS3. I am not a professional tuner but did spend maybe a thousand hours (over a period of 18 months) tunning my LS1 using DIY equipment such as a good scanner, Innovative LM-1 wide band sensor, LS1 Edit and a Passport G-Timer.