DiabloSport Predator 2 Tuner Kit with ECM Unlock for 2020-2023 Silverado and Sierra 2500HD 3500HD 6.6L L8T Gas - 7266-R

The DiabloSport 7266-R is a tuner kit for 2020-2023 Chevrolet Silverado and GMC Sierra 2500HD and 3500HD trucks with the 6.6L L8T gas V8. It includes the Predator 2 handheld programmer, the locksmith device and the ECM harness needed to unlock the factory-locked ECM with the module still in the truck.

Once unlocked, the preloaded 87, 91 and 93 octane tunes deliver up to 28 rear-wheel horsepower and 50 lb-ft over stock on 93, with matching calibrations for the 6-speed automatic. For a truck that tows, the transmission tune and the extra torque are what you feel.

Vehicle compatibility

• 2020-2023 Chevrolet Silverado 2500HD and 3500HD with the 6.6L L8T gas V8
• 2020-2023 GMC Sierra 2500HD and 3500HD with the 6.6L L8T gas V8
• Diesel L5P trucks use a different product
• Same kit with a touchscreen handheld: inTune i3 8266-R; with a dash-mounted monitor: Trinity 2 9266-R

Tuning and adjustment features

• ECM unlock hardware included; unlock and tune at home
• Preloaded tunes for 87, 91 and 93 octane with 6-speed transmission calibrations
• Speedometer correction for tire size and final drive ratio
• Rev limiter, idle RPM in Drive and Neutral, speed limiter removal and throttle sensitivity
• Front and rear TPMS thresholds and recall of last drive mode
• Service functions: transmission adaptive relearn, crank position sensor relearn, intake filter monitor control
• Data logging, read and clear trouble codes

What is in the box

• Predator 2 handheld programmer
• Locksmith unlock device
• ECM unlock harness
• OBD-II and USB cables
• Instructions

Installation and limitations

The ECM must be unlocked once before the Predator 2 can tune the truck. Connect the locksmith through the supplied harness, complete the unlock, then tune through the OBD-II port. After that the locksmith and harness are no longer needed.

Specifications

• Part number: 7266-R
• Brand: DiabloSport
• Warranty: 1 year manufacturer warranty
• Country of origin: United States
• Packaged size: 6 x 5 x 3 in, 2 lb
• UPC: 810065217387

Frequently asked questions

Do I have to pull the ECM?

No. The harness connects to the ECM in the truck and the unlock is done in the driveway.

How much power does it add?

DiabloSport publishes up to 28 rwhp and 50 lb-ft over stock on 93 octane.

Does it include transmission tuning?

Yes. Calibrations for the 6-speed automatic are included with the engine tunes.

Is this for the Duramax?

No. This kit is for the 6.6L L8T gas engine only.