Identify your GMC or Chevrolet rear end gear ratio by the RPO Codes, usually located on the placard labeled “Service Parts Identification” inside the drivers door panel or glove box. (Accurate identification using the GM RPO code assumes that the rear end has not been previously modified) ...
The cast-aluminum pistons were revised to lower the compression ratio. The forged steel connecting rods were also reinforced to handle the increased horsepower and torque. One of the main components to the increase in power and the lower emissions was upgrades to the common-rail fuel system. ...
If I put my truck in manual 5, it doesn’t try to go into V4 mode. What if I was able to “trick” the computer into thinking it is in 5th gear when it is actually in 6th? I also notice that it doesn’t go into V4 when it is cold. Was thinking maybe I could tri...
The solid foundation of a deep-skirt cast-iron block and cast-aluminum heads were carried over from the previous Duramax. The internals of the 6.6 Duramax were enhanced to provide additional durability. The cast-aluminum pistons were revised to lower the compression ratio. The forged steel connect...