What that translates into is a good amount of torque over a wide engine operating range giving more towing capability and low-end performance from the engine. •4.3L Vortec block bored 0.030 over ...

Rear axle, 3.23 ratio (Standard and only available on (LU3) 4.3L V6 or (L20) Vortec 4.8L V8 SFI FlexFuel on 2WD models. Refer to Engine/Axle chart for availability.) ...