PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

Tech 2 write over tuner cat

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Old May 8, 2013 | 02:49 PM
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Default Tech 2 write over tuner cat

Hi,
I currently have a tuner cat tuned tcm in an 06 c6 A6 that feels very oem-ish. Can a chevy dealer flash the original oem stock tcm tune over the tuner cat tcm tune? I don't currently have an oem tcm tune so i'd like a backup one. I will be putting a hpt tcm tune from ECS in the car. TIA
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Old May 8, 2013 | 02:51 PM
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Sure it will.
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Old May 8, 2013 | 02:55 PM
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omg that was fast. Thanks Ed!
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Old May 8, 2013 | 06:04 PM
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Yes, as long as the PCM/ECM isnt locked (I dont know if you can even do that with TunerCATS). If it's locked, you wont be able to write to it with anything unless you have the key used to lock it in the first place.
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Old May 8, 2013 | 06:08 PM
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The reason I said Sure! Is because Tunercat does not lock them.
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Old May 14, 2013 | 01:54 PM
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Originally Posted by Ed Wright
The reason I said Sure! Is because Tunercat does not lock them.
Good to know, EFILive and HPTuners have the option on most controllers. Wasnt sure about TunerCATS, thanks for clearing it up.
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Old May 14, 2013 | 02:10 PM
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No problem. Each package has it's advantages and short comings.
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Old May 15, 2013 | 02:58 PM
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Originally Posted by Ed Wright
No problem. Each package has it's advantages and short comings.
Ive found that to be completely the case, I held out a long time but finally broke down and bought HPT. Between HPT and EFILive, most of the stuff is covered. I wont buy Jet DST, much rather buy TunerCATS but until I need a RoadRunner that cant happen.
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Old May 15, 2013 | 07:34 PM
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I've run into problems that the GM TIS does to a pcm..... erase the serial number
then HPT you need model\year license. EFI will put a new serial in it and license the
pcm but good luck unlocking it to edit with anything else but EFI.
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Old May 16, 2013 | 08:42 PM
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Originally Posted by sreve
I've run into problems that the GM TIS does to a pcm..... erase the serial number
then HPT you need model\year license. EFI will put a new serial in it and license the
pcm but good luck unlocking it to edit with anything else but EFI.
Really? I have yet to see that be the case, EFILive doesnt lock controllers unless you specifically do it. Even their COSs arent locked, but HPT doesnt know what to do with a non-GM/HPT OS number/VIN mismatch. Usually the blank serial # happens with the LB7/LLYs, it happens does happen on occasion on gas PCMs though.

Flash it to assign a new serial number then it becomes just like a normal, unlocked controller. I havent had it happen in a while, next time it does Ill keep an eye out and try again with HPTuners.
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Old May 18, 2013 | 06:03 AM
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I've got one right now that EFI assigned the serial and TC or HPT can not
find the seed\key to unlock it. No custom OS.
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