In 1991 GM introduced a 15,000 pound GVWR truck C3500 HD under the Chevrolet and GMC nameplates that was replaced by the 4500. It was marketed as a truck to bridge the gap between light duty trucks “pickup trucks” and medium duty trucks. The C3500 HD was only offered as a standard chassis cab until 1996 when a crew chassis cab was also offered. It is not clear if the crew cab was for fleet orders only, or if anyone could order it. An extended cab was never offered on the C3500 HD, though several have been custom made by the registered owners. All paint colors and most options were offered in the C3500 HD. Upper cab marker/clearance lights were not optional equipment on the C 3500HD. The two mirror options are the camper style and west coast style mirrors. The common drive axle used on the C3500 HD was the Dana 80, an 85.8-inch-wide full floating axle with an 11-inch ring gear fitted with 19.5–inch x 6.0 tires. The front axle was a solid I-beam drop axle, similar to the axles of medium and heavy duty trucks. Both front and rear leaf sprung axles had disc brakes.