Remote ECU tune · 6.6L Duramax LBZ V8 turbo-diesel
A custom Stage 1, 2 or 3 calibration for your Chevrolet Silverado / Sierra 2500HD/3500HD 6.6 Duramax LBZ, built by hand by a real tuner from your own stock file and datalog, and back with you within three hours of the file arriving. We tune these cars remotely, worldwide: you read and flash with your own HP Tuners interface, and you pay only once the tune is delivered.
Stock vs tuned
From the factory the Chevrolet Silverado / Sierra 2500HD/3500HD 6.6 Duramax LBZ makes 360 hp and 650 lb-ft (881 Nm). A Stage 1 tune typically adds 60–130 hp and 140–243 lb-ft, for around 420–490 hp in total. With bolt-ons and a Stage 2 calibration that grows to +90–150 hp, and a Stage 3 build — drop-in upgraded turbo and injectors — typically lands at 520–620 hp.
| Stage | Added power | Added torque | Total power | Total torque |
|---|---|---|---|---|
| Stock | — | — | 360 hp | 650 lb-ft (881 Nm) |
| Stage 1 | +60–130 hp | +140–243 lb-ft (+190–330 Nm) | 420–490 hp | 790–893 lb-ft (1,071–1,211 Nm) |
| Stage 2 | +90–150 hp | +184–280 lb-ft (+250–380 Nm) | 450–510 hp | 834–930 lb-ft (1,131–1,261 Nm) |
| Stage 3 | +160–260 hp | +280–413 lb-ft (+380–560 Nm) | 520–620 hp | 930–1,063 lb-ft (1,261–1,441 Nm) |
Typical gains from published dyno results; your car will vary with fuel, mods and conditions.
Tuner's notes
The stock turbo and injectors run out around 525 rwhp, and past roughly 450 rwhp the Allison 1000 transmission becomes the weak link.
Supported versions
HP Tuners lists 2 Chevrolet Silverado / Sierra 2500HD/3500HD 6.6 Duramax LBZ entries covering 2006–2007, with 6.6-litre engines, diesel versions included. Interface: MPVI2 or newer.
| Years | Make | Model / engine as HP Tuners lists it | Controller | Credits | Unlimited licence | Interface |
|---|---|---|---|---|---|---|
| 2006–2007 | Chevrolet | Silverado 6.6 Duramax (Diesel) (LBZ) | Engine | 2 | 6 | MPVI2/2+/3/4 |
| 2006–2007 | GMC | Sierra 6.6 Duramax (Diesel) (LBZ) | Engine | 2 | 6 | MPVI2/2+/3/4 |
Support data per HP Tuners' supported-vehicle list (June 2026). Check your exact car on HP Tuners' vehicle list before you buy credits.
Stages & prices
One flat price per stage, the same for every car: $250 for Stage 1, $450 for Stage 2 and $650 for Stage 3. Ordering is free and you pay only once the finished tune is delivered. 2 free revisions are included with every order. Gearbox (TCM) shift tuning is included wherever your car's transmission controller can be accessed.
Software only. Every map in the engine ECM is recalibrated for the Chevrolet Silverado / Sierra 2500HD/3500HD 6.6 Duramax LBZ as it sits today — spark, fuelling, throttle response and limiters — against the datalog you send.
For a Chevrolet Silverado / Sierra 2500HD/3500HD 6.6 Duramax LBZ with bolt-ons fitted — intake, exhaust, headers or downpipe, and an intercooler where the car has one. The airflow and fuelling are rebuilt around the hardware you actually have.
Stage 3 on the Chevrolet Silverado / Sierra 2500HD/3500HD 6.6 Duramax LBZ means drop-in upgraded turbo and injectors. The fuel, spark and boost maps are written from scratch for your exact combination.
Typical gains from published dyno results; your car will vary with fuel, mods and conditions.
Before you order
How it works
FAQ
Typically 60–130 hp and 140–243 lb-ft (190–330 Nm) over the stock 360 hp, for around 420–490 hp in total. Typical gains from published dyno results; your car will vary with fuel, mods and conditions.
An HP Tuners interface (we recommend the MPVI4), the HP Tuners credits needed to license the engine ECM for writing, and your stock file plus a datalog of a drive. You read and flash the car yourself; we build the calibration.
Your custom tune is delivered within three hours of your stock file arriving. Six tuners work three shifts, so a file that lands in the middle of the night is picked up just as fast.
Stage 1 is $250, Stage 2 is $450 and Stage 3 is $650, flat. Ordering is free and you pay only once the finished tune is delivered. 2 free revisions are included with every order.
Stage 3 on the Chevrolet Silverado / Sierra 2500HD/3500HD 6.6 Duramax LBZ means drop-in upgraded turbo and injectors. The maps are written from scratch for your build, and typical results are 160–260 hp over stock. Typical gains from published dyno results; your car will vary with fuel, mods and conditions.
