GMC Sierra 1999–2007 tuning files
Typical stock and Stage 1 figures for each engine. Open an engine for torque, ECU and technical data.
Engine
Stock
Stage 1
Gain
4.3 V6 200hp
200 hp
220 hp
+20 hp
4.8 V8 295hp
295 hp
315 hp
+20 hp
5.3 V8 295hp
295 hp
315 hp
+20 hp
6.0 V8 360hp
360 hp
380 hp
+20 hp
6.6 Duramax 365hp
365 hp
395 hp
+30 hp
8,1 V8 330hp
330 hp
350 hp
+20 hp
Figures are typical for a stock vehicle in good condition. Actual results depend on condition, fuel quality and fitted hardware.