Chevrolet C/K 1977–1979 car dimensions: 5380 mm long, 2021 mm wide and 1879 mm high. Unladen weight is 2,003 kg. Braked towing is 2,948 kg.
The cabin is a basic regular cab setup with durable materials for work use. Heater is standard. Air conditioning is optional. Cruise Master cruise control is available as an option. Power windows and power door locks became available as options starting in 1977. No electronic driver aids are present.
The 8-foot Fleetside bed provides 74.3 cubic feet of cargo volume. Stepside beds offer less space at around 49.8 cubic feet.
A properly equipped K20 can tow up to 6500 lbs braked. Unbraked capacity is limited to trailers under 1000 lbs. Payload ranges from 2687 to 4283 lbs based on GVWR options from 6800 to 8400 lbs. Heavy-duty cooling and reinforced suspension packages are available for trailering and heavy work loads.
The regular cab offers a full-width foam-cushioned bench seat in vinyl or cloth, with high-back bucket seats available on higher trims. Higher trims add cut-pile carpeting, insulated headliner, door panels with woodgrain or brushed aluminum inserts, and extra sound deadening. Power flow-through ventilation runs with the ignition on. Air conditioning is available as a four-season system. Comfortilt steering wheel and power windows/door locks are available options. The cabin uses soft-touch materials on the dash, doors, and wheel for a durable work-ready feel with car-like appointments on top trims.
Front disc brakes standard with finned rear drums, computer-matched to GVWR.
Energy-absorbing collapsible steering column standard.
High Energy Ignition standard, extends tune-up intervals by eliminating points and condenser.
Coolant recovery system standard.
Engines operate on leaded or unleaded fuel.
Fuel systems use carburetors on the available inline-six and V8 engines. The High Energy Ignition delivers a hotter spark for reliable starts in all weather and helps extend recommended intervals between tune-ups compared to earlier point-type systems.
Servicing benefits from features like the coolant recovery system that maintains proper levels under normal conditions and the easy-access design of components such as the Salisbury rear axle. Rubber-bushed suspension points and shielded shocks help reduce wear from road debris.
Safety equipment includes standard front disc brakes with lining wear sensors on models under 8400 lbs GVWR that sound an audible alert, energy-absorbing steering column that telescopes on impact, laminated windshield, and extensive tempered safety glass totaling over 3300 square inches. Soft-padded interior surfaces add further protection.
Keeping the truck involves routine checks on the double-wall construction areas treated with anti-corrosion primers and wax preservatives. Available heavy-duty springs and shocks support loaded use while the ladder frame and independent front suspension (on 2WD equivalents) aid long-term durability.
Length 5380 mm, Width 2021 mm, Height 1879 mm, Wheelbase 3340 mm (C/K 1977–1979)
Sources: manufacturer data and published specifications.