2006 GMC Sierra Duramax - Start of the Diesel Generation

The LBZ engine under the hood of the GMC is largely stock. It now breathes through an AFE intake and out of the Magnaflow exhaust. Probes have also been added under the hood to monitor the boost pressure and exhaust gas temperatures.

An AFE Stage 2 intake is used to route air into the engine. The AFE intake uses a huge oiled cotton gauze filter with a heat shield to keep out hot underhood air.

A discrete toggle switch mounted in the center console drink holder adjusts the PPE boost controller and helps reduce EGTs. Autometer Phantom II series gauges monitor the exhaust gas temperatures and boost pressure at all times. The gauges are housed in an Autometer A-pillar gauge pod that keeps the information at eye level.

The MagnaFlow stainless steel mandrel bent exhaust is a full 5-inch system from the turbo back for unrestricted exhaust flow.

The rear of the RCD suspension uses a block under the factory leaf springs for a gain in altitude without any loss in load capacity. Bilstein 5100 series shocks smooth out the bumps.

The front of the RCD suspension uses new knuckles and drops the differential and lower control arm mounting locations for proper CV angles. Also, note the longer sway bar end links and spacers for the CV axles.

A set of 35-inch Toyo Open Country M/Ts are wrapped around 20-inch Moto Metal M0954 cast-aluminum rims. The Toyos are one of the few tires available in large sizes with an E-load range rating to handle towing and hauling duties.

When the LLY Duramax came out, the LB7 guys shunned the new variable geometry turbo and EGR system. Mechanics and performance shops loved them because you could change the injectors without removing the valve covers.