Of course, the massive rubber had other consequences, so the 6.6L LLY Duramax and Allison 1000 received upgrades to compensate. Southeast Diesel Performance in Yuma, Arizona, installed an AFE filter and PPE Hot+2 programmer before Luis Cardenas bent up a custom 5-inch exhaust that ends with a 6-inch MagnaFlow tip. The grand total for the Duramax is 485 hp and 850 lb-ft of torque.

The added power from the engine and resistance from the tires would have spelled disaster for even a transmission as stout as the Allison 1000, so it got a fresh batch of internals from Tom Georgalos at Lee Myles Transmissions. This included a Sun Coast Stage IV trans kit with a triple-disc converter, new clutches, and a new valve body. A Mag-Hytec pan also adds insurance with increased fluid capacity.

Inside the Kodiak, the interior is simple and functional, with pedals from Billet Specialties and chrome Escalade door handles, which adds some flash to an otherwise subdued black and gray theme. The huge carbon-fiber dash spreads in front of the driver with Auto Meter gauges to monitor engine and transmission vitals , such as intake air temp, exhaust temp, and boost pressure. Meanwhile, an Alpine IVA-200 navigation unit orchestrates the audio and sends video to a 17-inch Pyle flip-down monitor. Kar Tunz in Pleasanton, California, was tasked with installing all of the audio components, beginning with 144 sq-ft of Dynamat to soundproof the cabin.

Two Alpine PDX 4x100 amplifiers power components in the kick panel and doors, while three Alpine PDX 1000x1 and one PDX 250x2 - mounted under the rear seats - power the three 12-inch subs, which were mounted along the back wall of the cab. The crossovers were mounted in tough powdercoated steel buckets in the rocker panel. The powdercoating continues onto the seat brackets, custom made by Luis, where '05 Silverado bucket seats and the rear seat from a crew cab Silverado are now covered in comfortable Katzkin leather upholstery, installed by Burkes Upholstery in Salinas, California.