DOC #CERT-B356-25DD-2E3B
21.10.2026
Performance Report
ECU Chiptuning — Stage 1
Document Date
21.10.2026
GMC Sierra
2008 - 2013 • 6.0 V8 360hp • Petrol
Original
360HP
515 Nm
➤
Stage 1
380HP
535 Nm
▲ +20 HP / +6% ▲ +20 Nm / +4%
Estimated Power and Torque Curve
Customer
Chassis
Date
Signature
Stamp
NOTICE: This document represents estimated values based on database information. It is not valid as official certification without the original handwritten signature and physical stamp of the authorized technician. Performance values may vary based on vehicle condition, fuel quality and operating environment.