What is TuneBench?
TuneBench is an ECU tuning app for GM Gen III LS engines. It reads your PCM over Bluetooth, lets you edit the calibration with real XDF definitions, logs live data, turns your datalogs into table corrections, and writes the finished tune back to the truck or car. It runs on iPhone, iPad, Android, Mac, Windows and Linux.
Which vehicles does TuneBench support?
Writing tunes is supported on GM Gen III LS vehicles with a P01 or P59 PCM: LS1 and LS6 Camaros, Firebirds and C5 Corvettes, most 1999 to 2007 Silverado, Sierra, Tahoe, Yukon, Suburban, Avalanche and Escalade with the 4.8, 5.3 and 6.0, and LS swaps running one of those PCMs. Generic OBD-II live data works on most 2008 and newer vehicles. Gen IV (E38/E67) and more platforms are in development. See the supported vehicles page.
How much does it cost to tune my LS with TuneBench?
The app is free. Reading your PCM, editing, logging and exporting are always free. Writing a tune to a vehicle needs a license, which costs credits: Gen III LS (P01/P59) is 2 credits, and credits are $25 each, so $50 per vehicle. That license gives you unlimited writes to that vehicle, forever. There is no subscription.
Is TuneBench an HP Tuners or EFILive alternative?
Yes, for Gen III LS. HP Tuners and EFILive need a $500 to $1,000+ interface and a laptop. TuneBench uses the phone you already own and an OBDLink adapter, and licenses a Gen III LS for $50. They support far more vehicles today; if you are tuning a 1999 to 2007 LS, TuneBench does the core job for a fraction of the cost. See the full comparison.
What adapter do I need?
An OBDLink MX+ is the recommended adapter: it works on iPhone, iPad, Android, Mac and Windows and supports full read and write. OBDLink LX and the wired SX/EX work on Android and computers. Generic ELM327 clones can log but cannot read or write the PCM. The OBDX Pro is supported in beta. See adapters.
Do I need a laptop?
No. TuneBench was built phone-first. Reading, editing, logging, correcting and flashing all happen on your phone or tablet. If you prefer a big screen, the same account and licenses work in the Mac, Windows and Linux apps.
Can I use my existing tune files and XDFs?
Yes. TuneBench opens raw .bin files and TunerPro XDF definitions, including community definitions for common GM operating systems. It can find and load a matching definition for your OS automatically.
Will TuneBench brick my PCM?
TuneBench verifies GM P01/P59 checksums before every write, checks that the file matches the PCM's own VIN and controller, keeps your read as a version you can roll back to, and warns you to keep the phone awake and on a charger. As with any flashing tool, keep your original file and use a battery maintainer.
Can I try it before I buy anything?
Yes. A full demo vehicle is built into the app, so you can read, edit, log, correct and write against a simulated PCM with no adapter and no vehicle.
Is there a community?
Yes. The TuneBench Discord has a bin-file exchange, build threads, beta testing and direct help from the developer.
Tune it yourself, tonight.
Free to read, edit and log. License a Gen III LS for $50 when you're ready to write.