2007 GMC 4500 Box Truck

The 2007 GMC 4500 box truck shows up in the used commercial market under two different setups. The badge mostly appears on the GMC W4500, a cabover model built on the same platform as the Isuzu NPR. The same year and class also appears as the GMC Topkick 4500, a conventional-cab chassis with the engine ahead of the driver. For anyone shopping for a used box truck, the W4500 is the model that dominates online listings. These trucks are diesel powered, automatic, set up as straight trucks with an enclosed box, and flexible enough for local delivery, shuttle routes, and job site work. Used prices move across a wide range depending on mileage, box length, and overall condition.

Understanding the Two 2007 GMC 4500 Chassis Types

The GMC W4500 is the Japanese-designed cabover that GMC sold alongside Isuzu's NPR. Owner forum discussions describe the truck as one that handles much like an NPR because it shares that platform. The layout is straightforward: a 5.2L diesel engine sits under the cab, an automatic transmission sends power to a 4X2 drivetrain, and the frame supports a box body fitted by an upfitter. One listing for a 2007 model in Richland, Washington spelled out the basic combination as 222,027 miles, 5.2L diesel, automatic, and a 16-foot box, with a $5,000 asking price.

The Topkick 4500 is the less common interpretation of the GMC 4500 name. One 2007 Topkick 4500 that surfaced in a used equipment discussion was described as a fully optioned two-wheel-drive Monroe Conversion truck with power everything and zero rust, carrying an asking price of $17,000 at 183,000 miles. Since the two chassis types have different cabs, frames, and parts families, a buyer should confirm which one is listed before comparing prices or ordering service parts. The W4500 gets the most attention in box truck searches because it was widely built as a straight truck with cargo boxes of different lengths.

Power and Drivetrain Details

Most 2007 GMC W4500 box trucks available today run the Isuzu 5.2-liter inline four-cylinder diesel, known by the engine code 4HK1. Listings that carry full specifications rate the engine at 190 horsepower and 387 ft-lbs of torque. The transmission is automatic across the examples found in dealer inventory, auction results, and private sales.

The 387 ft-lb torque figure provides the pulling strength a loaded box body needs in stop-and-go delivery work. These trucks do not need high top speed; they need durability and predictability on local routes. The engine is a common medium-duty diesel from Isuzu, which matters for parts availability and service shop familiarity. Buyers comparing multiple 2007 W4500 trucks will find that the powertrain is consistent, with the main differences showing up in mileage, box configuration, and maintenance history.

Real World Speed and Fuel Economy

Owner-reported numbers for the 2007 GMC W4500 put the maximum speed at about 72 mph, with roughly 12 mpg on the interstate. A reply from another owner said 10 to 12 mpg on the interstate sounds correct. Several trucks are speed governed, meaning the engine control settings, rather than the driver's foot, cap the top speed. Actual fuel economy depends on load, route, and box height, but the mid-teens would be unrealistic for this style of truck.

Box Lengths and Common Configurations

Used listings show two main box lengths for the 2007 GMC W4500: 16-foot boxes and 20-foot boxes. A dealer walkaround video documented a 2007 GMC W4500 configured as a 16-foot box truck with a liftgate, which is a common setup for operations that load and unload at ground level. A private listing for a 2007 GMC W4500 described an Isuzu 20-foot box truck with no engine issues and no transmission issues.

The private 20-foot example had just over 70,000 miles and had already received new tires, a new air conditioning compressor, a new radiator, and new brakes. Trucks that come with recent wear items reduce the immediate expense after a sale. Box length also affects how the truck is parked, maneuvered, and loaded, so confirming the actual box length before you travel to inspect a truck saves time. A liftgate adds weight and complexity, but it can be a deciding factor for businesses that handle freight without a loading dock.

Used Market Prices for the 2007 GMC 4500 Box Truck

Current asking prices and auction results show a broad range for this truck. The table below summarizes documented examples from dealer listings, auction records, and private sales.

The $1,900 figure represents a starting point within a group of 23 used W4500 listings, not a normal asking price for a running 2007 model. One of those listings showed 231,000 miles, an Isuzu 5.2L four-cylinder rated at 190 hp and 387 ft-lbs of torque, and a 4X2 drivetrain. A lower price usually means higher miles, older tires, or deferred maintenance, so the sticker number alone should not drive the decision.

Auction data points like the Claremore, Oklahoma sale show the difference between asking prices and what buyers actually pay. The contract price on that truck was $5,170 after the auction closed on February 28, 2024, which is lower than many retail asking prices for similar trucks. Auction result trackers for GMC W4500 box trucks listed recent sales concentrated across Oklahoma, Texas, Kansas, and Nebraska, which gives a useful picture of where regional inventory tends to appear.

What to Check Before Buying a 2007 GMC 4500 Box Truck

The documented listings and owner discussions point to a clear set of inspection priorities. Work through these items before committing to a purchase:

• Rust and body condition: One Topkick seller advertised zero rust as a major selling point. Frame rust, cab corrosion, and box floor damage can turn a cheap truck into an expensive project.
• Cooling and air conditioning parts: New radiators and AC compressors appear on well-maintained examples. On other trucks, these are common failure points that add cost after purchase.
• Brake and tire condition: New brakes and tires were listed on a 20-foot example. Worn versions on a heavy box truck can be expensive to replace immediately.
• Engine and transmission condition: One seller specifically noted no engine issue and no transmission issue. On the used market, that claim should always be verified with a test drive and service records.
• Mileage and history: Documented examples range from just over 70,000 miles to 231,000 miles. The odometer reading alone is not enough; consistent maintenance matters more on a medium-duty diesel.
• Cab interior and controls: Power accessories, gauges, and the air conditioning system were highlighted on higher-trim examples. Check that everything works before you negotiate.

Also factor in transportation costs if you are buying at a distance. Auction volume for GMC W4500 box trucks skews toward Oklahoma, Texas, Kansas, and Nebraska, so a buyer in another region may need to budget for hauling the truck home. Compare the purchase price, expected maintenance items, and shipping cost together to get the real total investment.

Frequently Asked Questions

These are the questions buyers ask most often when comparing 2007 GMC 4500 box trucks.

Is the 2007 GMC 4500 the same as an Isuzu NPR?

Owner discussions about the 2007 GMC W4500 note that the truck is built on the Isuzu NPR platform. The cab, chassis, and diesel powertrain are shared between the two brands. When researching parts, service procedures, or comparable prices, treating the GMC W4500 and Isuzu NPR as related trucks gives you a larger pool of information to work with.

What engine does a 2007 GMC W4500 use?

The 2007 GMC W4500 uses the Isuzu 5.2L inline four-cylinder diesel, referenced in listings as the 4HK1. Documented specifications rate the engine at 190 horsepower and 387 ft-lbs of torque. The engine pairs with an automatic transmission in the examples found across dealer, auction, and private listings. This powertrain combination was the standard formula for W4500 box trucks of that model year.

What is the top speed and fuel economy like?

One 2007 GMC W4500 owner reported a governed top speed near 72 mph and interstate fuel economy close to 12 mpg. Another experienced owner responded that 10 to 12 mpg on interstate routes sounds correct. The truck is speed governed in some cases, so the electronic settings limit top speed. Actual mileage varies with load weight, box height, and driving route.

How much does a used 2007 GMC 4500 box truck cost?

Documented prices cover a wide range. A 2007 GMC W4500 in Richland, Washington was listed at $5,000 with 222,027 miles, while a Claremore, Oklahoma auction closed at a $5,170 contract price with 104,427 miles. A group of 23 used W4500 listings included units priced as low as $1,900. A 2007 GMC Topkick 4500 with 183,000 miles and a full conversion carried a $17,000 asking price, showing that condition and configuration move the final number significantly.