Gen III LS.
Read, log, write.
TuneBench flashes GM Gen III LS engine computers with a P01 (512 KB) or P59 (1 MB) PCM over the OBD-II port. If your PCM is on this list, you can tune it from your phone tonight.
GM P01
Read, log and write512 KB · Motorola 68332Hardware 9354896 and 12200411. Most 1999–2003 trucks plus the LS1/LS6 cars.
GM P59
Read, log and write1 MB · Motorola 68332Hardware 12586242 / 12586243 family. Most 2003–2007 Classic trucks and SUVs.
Gen IV E38 / E67
In developmentCAN · GMLANFull E67 reads work on the bench. Writing ships when it is proven on real vehicles.
Generic OBD-II
Live dataMost 2008+ vehiclesStandard live data (RPM, load, trims, timing, temps) on almost any modern car.
Gen III LS vehicles TuneBench can tune
These are the typical applications for P01 and P59 PCMs. GM mixed controllers across model years, so the PCM part number is what matters: TuneBench reads it and tells you before you spend anything.
| Vehicle | Engines | PCM |
|---|---|---|
| 1999–2002 Chevrolet Silverado / GMC Sierra | 4.8 LR4 · 5.3 LM7 · 6.0 LQ4 | P01 |
| 2003–2007 Silverado / Sierra Classic | 4.8 LR4 · 5.3 LM7/L59/L33 · 6.0 LQ4/LQ9 | P59 |
| 2000–2006 Tahoe, Yukon, Suburban, Yukon XL | 4.8 LR4 · 5.3 LM7/L59 · 6.0 LQ4 | P01 / P59 |
| 2002–2006 Avalanche · Escalade · Yukon Denali | 5.3 LM7/L59 · 6.0 LQ9 | P01 / P59 |
| Chevrolet Express / GMC Savana (Gen III Vortec) | 4.8 LR4 · 5.3 LM7 · 6.0 LQ4 | P01 / P59 |
| 1998–2002 Camaro Z28/SS · Firebird Formula/Trans Am | 5.7 LS1 | P01* |
| 1999–2004 Corvette C5 / Z06 | 5.7 LS1 · LS6 | P01* |
| 2003–2006 Hummer H2 · 2003–2007 Trailblazer EXT / Envoy XL 5.3 | 6.0 LQ4 · 5.3 LM4/LM7 | P59 |
* Some early F-body and C5 cars use a different controller. Connect with the free app to confirm yours. Writing a Pontiac GTO, any 2007+ GMT900 truck (E38) or a Duramax LB7/LLY is not available yet.
How do I know which PCM I have?
Connect TuneBench with your adapter and tap Read. The app reads the VIN, hardware number and operating system (OS) ID and tells you whether the controller can be written. Reading is free, so there is no risk in checking. You can also look at the label on the PCM: P01 and P59 units are the aluminum-cased, two-connector boxes mounted on the driver side of the engine bay on most trucks.
What's next
Gen IV (E38 and E67 on CAN) is the next platform. Reads already work on the bench and the write path is in testing with the community. After that: the rest of the GM VPW family (P04, P08, P10, P12), then other makes. Join the Discord to apply for the beta.
Your LS is on the list.
Free to read, edit and log. License a Gen III LS for $50 when you're ready to write.