How to Legally Install a Cargo Box on a Small Truck?

2 Answers
VonBethany
07/29/25 3:40am
Installing a cargo box on a small truck is illegal. According to regulations, cargo vehicles can only be equipped with windshields, water tanks, toolboxes, and spare tire racks. Other modifications are not allowed. Common illegal modifications for trucks include: brake sprayers, changing the height of the side panels, extending the cargo box, converting side panels into cargo boxes or vice versa. Illegal vehicle modifications refer to unauthorized changes to the structure of a vehicle that has already obtained a road transport certificate without approval from relevant authorities. These mainly include the following aspects: 1. Unauthorized changes to the vehicle type or purpose; 2. Unauthorized changes to the vehicle's color, replacement of the engine, body, or frame, without applying for a change of registration with the vehicle management office within ten days after the modification; 3. Unauthorized changes to the vehicle's appearance (such as modifying the exhaust pipe, adding large body kits, or large rear spoilers) and registered technical data; 4. Unauthorized changes to the vehicle's external dimensions or load limits.
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CarsonFitz
08/12/25 7:28am
To legally install a cargo box, you must first understand the regulations thoroughly. Last year, I modified the cargo compartment of a small truck and specifically studied the 'Motor Vehicle Registration Regulations' and National Standard GB 7258. The key points are that the filing procedures cannot be skipped, the dimensions must be kept within the original vehicle's length and width, and the cargo box structure must be sturdy and reliable. I directly engaged a certified modification workshop for the design, opting for lightweight aluminum alloy materials, ensuring the total height did not exceed 2.5 meters. After installation, I immediately went to the DMV to complete the change registration, re-stamped the chassis number, took photos, and updated the vehicle license. It's crucial not to obstruct the license plate lights or reverse lights, and the cargo box floor must not extend beyond the outer edge of the tires—these details are particularly critical during inspections. It's advisable to check with the local DMV for specific standards before modification, as enforcement may vary by region.
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