Chevrolet Silverado 2011-2013 6.6 V8 DuraMAX 397bhp remap figures
Thinking of remapping a Chevrolet Silverado 6.6 V8 DuraMAX 397bhp? The standard car makes 397bhp and 1037Nm; with a Stage 1 remap from our Leicester workshop we expect around 485bhp and 1225Nm, up to +88bhp and +188Nm.
Choose your map
Stage 1 remap figures
A Stage 1 remap is a software-only change to the ECU on an otherwise standard car. It needs no extra parts, which makes it the usual starting point.
| Stock | Vanguard expected | Expected gain, up to | |
|---|---|---|---|
| Power | 397 bhp | 485 bhp | +88 bhp |
| Torque | 1037 Nm | 1225 Nm | +188 Nm |
All maps at a glance
| Map | Power | Torque | Expected gain, up to |
|---|---|---|---|
| Stock | 397 bhp | 1037 Nm | |
| Stage 1Maximum software-only performance | 485 bhp | 1225 Nm | +88 bhp +188 Nm |
| Stage 1 EcoPerformance with economy in mind | 463 bhp | 1210 Nm | +66 bhp +173 Nm |
| Eco mapEconomy first | 456 bhp | 1201 Nm | +59 bhp +164 Nm |
Who is the Stage 1 map for?
- Drivers who want stronger pulling power for overtaking, hills and towing, with no parts to fit.
- Daily and motorway drivers who want the engine to feel less strained at cruising speed.
- Anyone who wants the biggest software-only change we list for this engine.
What this means for your Silverado
Diesel remaps work mainly on boost pressure, fuel delivery and torque limiters, which is why the Nm gain is usually the figure you feel in everyday driving, particularly when overtaking or towing.
The ECU recorded for this variant is a Bosch EDC17CP18. We read the ECU on your car and compare it with the software listed here before any work starts, so you know what to expect before you commit.
We remap at our Belgrave Gate workshop in Leicester, or at your home or work within 30 miles, and every job starts with a diagnostic check.
Please note: these are expected figures, not guarantees. Real results vary with the condition of the vehicle, the ECU software version, fuel quality and the hardware fitted. Some options - including Stage 2 and anything that needs extra hardware - are for off-road or competition use only. We check every vehicle first and confirm what is achievable before any work starts.
Figures reviewed 22 October 2026.
Stage 1 questions
How much power does the Stage 1 map give the Chevrolet Silverado 6.6 V8 DuraMAX 397bhp?
We expect 485bhp and 1225Nm against 397bhp and 1037Nm as standard: up to +88bhp and +188Nm. These are expected figures, and we confirm what is achievable on your own car after a diagnostic check.
Does a Stage 1 remap need any extra parts on the Chevrolet Silverado 6.6 V8 DuraMAX 397bhp?
No. Stage 1 is a software-only change to the ECU on an otherwise standard car.
Is there a gentler map than Stage 1 for this engine?
Yes, two. Stage 1 Eco is performance with economy in mind: 463bhp and 1210Nm expected. The Eco map is economy first: 456bhp and 1201Nm. Both still sit above the standard 397bhp and 1037Nm.
Do I need to tell my insurer about a remap?
Yes. A remap is a modification, so you should declare it to your insurer.
More Chevrolet Silverado figures
Other diesel variants
All diesel Silverado variants · Silverado 2007-2013 overview · All Chevrolet figures