Description
GM E90 ECM Bench Tune — Unlock Included, 89 / 91 / 93 Octane Performance Tune, DOD Delete and Speed Limiter Removal
A complete mail-in bench tune for the GM E90 ECM, done in-house by N2 Speed in Pompano Beach, Florida. The E90 is locked from the factory, so normally you pay for an unlock and a tuner before anyone touches your calibration. Here the ECM unlock is already included in the price — you ship the module, we unlock it, write your custom calibration on the bench and send it back ready to install.
One Price — ECM Unlock Included
- E90 ECM unlock included — no separate unlock service to buy
- No tuning device to buy — no HP Tuners interface, no credits, no licence fees
- No laptop, cables or software — you ship a module, you get a tuned module
- No driveway flashing — no failed flash on a weak battery
Choose Your Options at Checkout
- Fuel / octane — 89, 91 or 93 octane. Spark and fuel are built around the fuel you actually run, so pick honestly: a 93 file on lower-octane fuel pulls timing and can knock; a lower-octane file on 93 leaves power unused.
- DOD delete — turn off GM cylinder deactivation (Active / Dynamic Fuel Management) so all eight cylinders stay live, or leave it active.
- Speed limiter — remove the factory top speed limiter or leave it stock.
What the Performance Tune Changes
- Spark advance optimised for your selected octane, with knock protection left in place
- Wide-open-throttle fuelling targeted for power and safe air/fuel ratios
- Throttle response — factory pedal lag reduced for a sharper feel
- Torque management reduced where the factory pulls power
- DOD / cylinder deactivation and speed limiter set per your selections
What you get is a truck that responds the way it should have from the factory, without cylinder deactivation or a speed limiter in the way. We do not promise dyno numbers we have not measured on your truck.
Why Delete DOD
- Smoother, consistent power — no cycling in and out of reduced-cylinder mode when merging or towing
- Removes the vibration and drone many owners notice during deactivation
- Takes load off the deactivating lifter system, a well-known GM V8 failure point
Fitment
- GM E90 ECM (Global A / non-Global B) — 2019–2022 Chevrolet Silverado 1500 and GMC Sierra 1500 with the 5.3L or 6.2L V8
- Global B ECMs are not covered by this listing — contact us for those
Not sure which ECM you have? Email a photo of the module label with your VIN to sales@n2speed.com and we will confirm before you order.
How It Works
- Order here and pick your octane, DOD and speed limiter options.
- Remove your ECM (per your vehicle's service manual) and ship it to us with your order number.
- We unlock and bench tune it — calibration written to your module and verified.
- We ship it back — most modules leave within 1–2 business days of arrival. Reinstall and drive.
Ship UPS or FedEx (tracked and insured) to: N2 Speed
1461 SW 30th Ave. Bay 16, Pompano Beach, Florida 33069
Pack the module so the connectors are protected.
Important Notes
- Mail-in bench service — your truck is down while the module is with us.
- Tell us your real modification list and fuel. A calibration written for the wrong fuel is the fastest way to hurt an engine.
- Modified calibrations are intended for off-road and competition use and can affect your factory warranty.
- No refunds once your module has been unlocked/tuned and shipped back.
Related Services
- E90 ECM unlock only — if you tune it yourself with HP Tuners
- All GM PCM bench tuning
- Chevrolet Silverado remote tuning
Questions before you ship? Call (954) 406-8550 or email sales@n2speed.com. N2 Speed — Pompano Beach, Florida.
