1978 Chevrolet C20 2

The third generation of the C/K series is a range of trucks that was manufactured by General Motors from the 1973 to 1991 model years. Serving as the replacement for the "Action Line" C/K trucks, GM designated the generation under "Rounded Line" moniker. Again offered as a two-door pickup truck and chassis cab, the Rounded Line trucks marked the introduction of a four-door cab configuration.

Marketed under the Chevrolet and GMC brands, the Rounded Line C/K chassis also served as the basis of GM full-size SUVs, including the Chevrolet/GMC Suburban wagon and the off-road oriented Chevrolet K5 Blazer/GMC Jimmy. The generation also shared body commonality trucks.

In early 1987, GM introduced the 1988 fourth-generation C/K to replace the Rounded Line generation, with the company beginning a multi-year transition between the two generations. To eliminate model overlap, the Rounded Line C/K was renamed the R/V series, which remained as a basis for full-size SUVs and heavier-duty pickup trucks. After an 18-year production run (exceeded only in longevity by the Dodge D/W-series/Ram pickup and the Jeep Gladiator/Pickup), the Rounded Line generation was retired after the 1991 model year.

During the 1970s, the model range underwent several revisions to its powertrain line. For 1975, a 400-cubic-inch V8 was introduced as the largest engine option for K-series trucks, slotted above the 350, in another change, catalytic converters were fitted to all trucks under 6000 lbs GVWR. The 250-cubic-inch inline-six was discontinued on 3/4- and 1-ton models for 1975. For 1977, a 305-cubic-inch V8 was introduced for C-Series half-ton trucks, expanding the engine range to six.

Initial Intake Photos The bench seat has been temporarily removed to access and execution of the firewall repair process. The components related to the powertrain, specifically the engine and transmission systems, have been removed from the vehicle. When we removed the mat from the bed, we discovered that rust has eaten through the metal of the bed. We have begun to remove the dash components.

The driver's side fender has been removed to gain access to further remove objects from the firewall. We have removed everything from the dash and the upholstered door panels. The bed has been removed from the so that we can replace the bed floor. The new bed floor pan has been delivered. Conducting a preliminary fitment assessment of the new bed floor pan before we install it with the bed sides.

We have removed the wheel tubs to be able to reattach them to the new bed floor. The new bed floor has been reattached to the bed sides. Here we have begun to cut the spot welds on the firewall to begin replacing it. The dash, steering columns and pedals have been removed so we can repair the firewall.