GMC TopKick C4500 Specs

by James Green
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The GMC TopKick C 4500 is a large heavy-duty truck that has been manufactured since 2005. It uses the same chassis as the Chevrolet Kodiak. In addition to the mid-range four-wheel-drive crew cab version, two-wheel drive, regular cab, motor home, and commercial cutaway version of the vehicle is also produced.


The four-door, five-passenger, four-wheel drive crew cab version of the GMC TopKick C4500 has an 11,300-pound curb weight. It is fitted with daytime running lights, air bags, power outlets, power steering, steps under the cab doors and bucket seats.

Engine and Performance

The GMC TopKick C4500 Crew Cab 4WD with a DURAMAX 6600 Turbo Diesel V8 engine is equipped with 32 valves. This produces an engine displacement of 6599 cc, 300 horsepower at 3,000 rpm and 520 foot-pounds of torque at 1,600 rpm. It accelerates from 0 to 60 mph in 14.4 seconds, has a top speed of 75 mph and can stop from 70 to 0 mph in 228 feet. The truck is also available with GM's 8.1-liter gas V-8, which has 325 horsepower.


In the 2011 Crew Cab 4WD trim, the front axle has an 8,000-pound capacity, a 45-degree turn angle, and is fitted with four-piston disc brakes manual locking hubs. The rear axle has a 13,500-pound capacity and two-piston disc brakes. Four-channel ABS is fitted throughout. The truck is equipped with an automatic Allison 1000 Series transmission, and a six speed auto with fourth-generation electronic controls is optional.

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