Up next, Simon tapped into the fuse box to pick up a key-on power source for the MagnaVolt voltage system. | 
After drilling four 1/4-inch holes, the MagnaVolt unit was secured to the top of the fuse box and the wiring harnesses were plugged-in. |
It was now time to fill the water tank with 50-percent coolant and 50-percent water. After a couple of ignition turns, the water heat exchanger was cycled through and checked for air bubbles. | 
Simon performed a quick double-check of everything and made sure all the sensors were connected, hoses were secured, and bolts were tightened. Ready to go, the MagnaCharger was all set to make more than 375 hp to those huge 24-inch wheels. |
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From The Driver Seat
Our test GMC was one of the first trucks with this new system from Magna Charger, and the end result was blatantly positive. Besides the huge increase in horsepower, torque was up throughout the powerband and could be felt at an incredibly low rpm. With the engine working more efficiently, the 5.3L actually produces better fuel mileage; that is, until the realization of having this much power hits Reed and he smashes the throttle. Popping the hood makes everyone smile who sees the large polished supercharger, and the install went pain-free. With the knowledge of the powertrain warranty available, a high-speed burst on the freeway knocked out all of the doldrums of the workday and kept the adrenaline flowing. For a video of this dyno run, go to truckinweb.com.
| YOUR QUESTIONS ANSWERED |
| TIME SPENT WORKING | 8 hours |
| DEGREE OF DIFFICULTY | Intermediate |
| TOOLS NEEDED: Multiple metric sockets, pliers, flat screwdriver, drainpan, lb-ft torque wrench, and wire crimpers |
| PARTS USED: MagnaCharger Radix Intercooled supercharger system |
| 011260041SL | $6,069.99 |
| (Price from stylintrucks.com) | |