Tune your LS from your phone.

Read, log, correct and flash GM Gen III P01 and P59 PCMs over Bluetooth. Free to read, edit and log. License a truck for $50.

Download on theApp StoreComing soonGoogle PlayComing soonmacOSComing soonWindowsComing soonLinux

Tuning an LS used to mean a $500 interface, a laptop riding shotgun and a spreadsheet of corrections. Now it is the phone already in your pocket.

Connect

Plug in. Pair. Done.

An OBDLink in the port and your phone in your hand. TuneBench finds the PCM, reads the VIN and identifies the controller and operating system.

  • OBDLink MX+, LX, SX and OBDX Pro
  • P01 / P59 auto-detected
  • No laptop, no cables, no drivers
Edit

Real tables. Real math.

Every table from a TunerPro XDF, color-mapped like the pros use. Select a block, add 10%, smooth it, interpolate it, paste it. Undo anything.

  • Set, add, %, multiply, smooth, interpolate
  • Compare any table to stock in one tap
  • Every save is a version you can roll back to
3D

Your map, in 3D.

Spin the VE table with a finger and see the spike you would have missed in a grid of numbers.

  • Interactive 3D surface for any 3D table
  • Pinch, orbit, inspect
  • Changes highlighted cell by cell
Log

20 Hz. From your pocket.

Live gauges, charts and VCM-style histograms while you drive. Add a wideband on a spare input and log real AFR.

  • RPM, MAP, trims, knock, spark, IPW and more
  • AEM, Innovate, 14Point7, PLX, Zeitronix
  • Histograms by RPM and MAP, like VCM Scanner
Correct

Your log fixes your tune.

Overlay a datalog on the table. TuneBench works out the error in every cell and applies the correction in one tap, with limits you control.

  • Wideband AFR error or fuel trims
  • Strength, max change and minimum samples
  • Preview every cell before you apply
Write

Flash it back.

Write the calibration over OBD-II. Checksums are verified and corrected for you, and the write is checked against the PCM before it starts.

  • GM P01 / P59 checksums handled
  • Bound to your VIN and PCM
  • Full progress, logging and verify
B0101 · Main VE Table
RPM × MAP kPa · from log 1,752 samples
Preview
Lean, add fuelRich, pull fuelCorrected VE
Tune from log

The math, done.
Every cell.

0cells corrected
  1. Record a drive with a wideband or fuel trims.
  2. Open the table. TuneBench bins every sample to its cell.
  3. Preview the change in each cell, with your limits.
  4. Apply in one tap. Undo if you don't like it.

A tuning bench
that fits in a glovebox.

Tune from log

The feature that pays for your adapter.

Record a drive, open the VE or MAF table, and let TuneBench do the math every tuner does by hand. Lean cells go up, rich cells come down, cells without enough data are left alone.

How it works
Logging

Up to 20 samples a second.

Fast enough to catch a knock event and see exactly where it happened.

20Hz
Checksums

Never flash a bad checksum.

Every P01/P59 segment is verified and corrected before a single byte is written.

0x08000 Engine OK 0x14000 Eng diag OK 0x16E00 Trans OK 0x1BE00 Trans diag OK 0x1C800 Fuel Fixed 0x1E520 System OK
Definitions

Speaks XDF.

Open TunerPro XDF definitions and raw bins. TuneBench finds the right definition for your OS automatically.

12212156
12202088
12593358
12587603
9381344
12579405
12560108
12592425
Everywhere

One account. Every screen.

Buy a license once and it follows you to iPhone, iPad, Android, Mac, Windows and Linux.

Histograms

See where it's lean. Instantly.

Fuel trims, wideband error, knock retard and spark, binned by RPM and MAP while you drive. The same view the pros use in VCM Scanner.

Versions

Every change, tracked.

See exactly which cells you touched, compare to stock, and roll back any version. Your stock read is always kept.

Same truck.
A fraction of the price.

What it costs to get from stock to your own tune on one Gen III LS truck, starting from nothing.

TuneBenchapp free · 2 credits · OBDLink MX+
$0
HP TunersMPVI4 + 2 credits · laptop
$0
EFILiveFlashScan V3 + tuning · laptop
$0

Already have an OBDLink? Your cost is $50. Competitor prices are public retail listings as of October 2026 and exclude the laptop. Every additional Gen III LS on TuneBench is $50; HP Tuners is about $100.

TuneBench vs HP Tuners How credits work

Every LS that made LS famous.

1999 to 2007 trucks and SUVs, F-bodies and the C5 Corvette. If it has a P01 or P59 PCM, TuneBench reads it, logs it and writes it.

Check your vehicle
  • LS15.7L
  • LS65.7L
  • LM75.3L
  • L595.3L
  • L335.3L
  • LM45.3L
  • LR44.8L
  • LQ46.0L
  • LQ96.0L

P01

Read, log and write

1999 to 2003 trucks, F-body, C5

P59

Read, log and write

2003 to 2007 Classic trucks and SUVs

Gen IV E38 / E67

In development

CAN read working on the bench

Any OBD-II

Live data

Generic live data, most 2008+

Tune with people who actually tune.

Swap stock bins, post your build, get your logs looked at and test new features before anyone else. The developer is in there every day.

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Join the Discord
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bin-filesStock and modified reads, sorted by make and controller
#
show-your-buildLS swaps, cammed trucks, turbo builds
#
helpLogs, tables, adapters, first flashes
#
beta-applicationsGet new controllers before release

Questions, answered.

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: most 1999 to 2007 Silverado, Sierra, Tahoe, Yukon, Suburban, Avalanche, Escalade and Express/Savana trucks with the 4.8, 5.3 and 6.0 (through the 2007 Classic body), plus LS1 and LS6 cars from the same era. 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.

All questions

Your truck.
Your tune.

Free to download. Free to read, edit and log.

Download on theApp StoreComing soonGoogle PlayComing soonmacOSComing soonWindowsComing soonLinux