A GMC Sierra 8,1 V8 330hp (1999 – 2007) makes about 350 hp and 630 Nm with Stage 1 software, compared with 330 hp and 610 Nm from the factory. That is 20 hp and 20 Nm extra.

This is a petrol engine with a displacement of 8,128 cc and engine code L18.

Besides Stage 1, the following options are available for this vehicle: DECAT, DTC Removal, START/STOP OFF, FLAPS, Pop & Bang Crackle map and Vmax.

Frequently asked questions

How much power and torque does a GMC Sierra 8,1 V8 330hp gain with Stage 1?

About 20 hp and 20 Nm: from 330 hp / 610 Nm to roughly 350 hp / 630 Nm. The exact gain depends on engine condition and fuel quality.

Which extra options are available for a GMC Sierra 8,1 V8 330hp?

DECAT, DTC Removal, START/STOP OFF, FLAPS, Pop & Bang Crackle map and Vmax.

Figures are indicative and vehicle specific. Check the regulations that apply in your country before modifying engine software.