General Motors' first major redesign post-World War II, the Advance Design series was billed as a bigger, stronger, and sleeker design. First available on Saturday June 28, 1947, these trucks were sold with various minor changes over the years until March 25, 1955, when the Task Force Series trucks replaced the aging Advance Design model

  The 1960 model year introduced a new body style of light pick-up truck that featured many firsts. Most important of these were a drop-center ladder frame, allowing the cab to sit lower, and independent front suspension, giving an almost car-like ride in a truck.

Also new for 1960 was a new designation system for trucks made by GM. Gone was the 3100, 3200, and 3600 designations for short 1/2, long 1/2 and 3/4-ton models.

Instead, a new scheme would assign a 10, 20, or 30 for 1/2, 3/4, and 1-ton models. Since 1957, trucks were available from the factory as 4-wheel drive, and the new class scheme would make this known. A C (Conventional) in front of the series number would indicate 2-wheel rear drive while a K would denote 4-wheel drive.

Actual badging on trucks still carried the series name system from the previous generation. The 10, 20, and 30 series (C or K) were badged as "Apache 10", etc. 40, 50, and 60 series trucks were badged as "Viking 40", and the largest 70, 80, and 90 series models were marked "Spartan 70" etc. in 1960, C/K trucks were available in smooth "Fleetside" or fendered "Stepside" versions. GMC called these "Wideside" and "Fenderside."

Half-ton models were the C10 and K10 short-bed trucks, and C15 and K15 long-bed trucks. The 3/4-ton C20 and K20, as well as the one-ton C30, were also available. GMC did not use the "C" nomenclature, though their 4x4 versions had the "K" designation.

The 1962 model used torsion bar front suspension, with trailing arm suspension rear. Trim lines were base and "Custom." Engines included the base GMC 305 in³ V6 for the GMC version, 135 hp (101 kW) 236 in³ (3.9 L) and 150 hp (112 kW) 261 in³ (4.3 L) straight-6s, and a 283 in³ (4.6 L) V8 with 185 hp (119 kW).

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  A new, more modern look came in 1967, along with a new nickname: "Action Line".

It was with this revision of the C/K truck that General Motors began to add comfort and convenience items to a vehicle line that had previously been for work purposes alone.

The majority of 10 and 20 series Chevrolet trucks from 1967 to 1972 were built with a coil spring trailing arm rear suspension, which greatly improved the ride over traditional leaf springs. However, the leaf spring rear suspension was still available on those trucks, and standard on 30 series trucks.

GMC models came standard with leaf springs with coils springs optional; all four-wheel drive models (Chevrolet and GMC) had leaf springs on both axles.

This was the only year of the "small rear window"; it was replaced with larger rear glass in 1968. The standard drivetrain came with a three speed manual transmission and one of two engines; the 250 in³ straight six or the 283 cu in (4.6 L) V8.

The optional transmissions were the four speed manual, the Powerglide and the Turbo-Hydramatic 350 and 400. The 292 six and the 327 in³ V8 were the optional engines. The 1/2 ton trucks came with a 6 x 5.5" bolt pattern, the 3/4 and 1 ton trucks came with an 8 x 6.5" bolt pattern.

 An all-new clean sheet redesign of General Motors' Chevrolet and GMC brand C/K-Series pickups débuted in 1972 for the 1973 model year.

Development of the new third generation trucks began in 1968, four years prior to production in 1972, with vehicle components undergoing simulated testing on computers, before the first prototype pickups were even built for real world testing.

The redesign was revolutionary in appearance at the time, particularly the cab, departing from typical American pickup truck designs of the era.

Aside from being near twins, the Chevrolet and GMC pickups looked like nothing else on the road.As a result, the third generation trucks quickly became known as the "Rounded-Line" generation; although some people may refer to them as "square bodys", given that the trucks appear square-like by more modern automotive design standards

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  For the 1987 model year, the last model year for the conventional cab pickups, the rounded-line C/K-Series were renamed the R/V-Series. R-Series now designated two-wheel drive, while V-Series represented four-wheel drive. The name change is also found in the vehicle identification number.

This was done in preparation for the next generation GMT400 trucks, which were produced concurrently with the older line. The new 1988 model trucks entered production December 8, 1986 at Pontiac East, Oshawa, and the new Fort Wayne plant. The 1987 models continued to be built at Janesville, St. Louis, and Flint.

Along with the name change, came other major improvements and tweaks for the final model year of the conventional cab pickups.

Single-point electronic throttle-body fuel injection (TBI) was introduced on GM's full-size pickups, with new electric fuel pumps and high-pressure fuel lines. In addition, a new powertrain control module (PCM) was also introduced, which controlled the fuel injection system, fuel-to-air burn ratio, engine ignition timing, electric fuel pumps, and the Turbo Hydra-Matic’s (if equipped) turbine torque converter clutch.

The 5.7 liter 350 cubic inch pushrod V-8 was reintroduced to the order books for R-Series and V-Series half-tons with the new TBI fuel injection system. Horsepower and torque output was increased to 210 hp, and 300 lb-ft of torque.

After 1987, R/V remained in use for the full ton 30/35 models, V30/35 regular cab dually, and crew cabs through 1991 (built at Janesville), and SUVs (Chevrolet K5 Blazer and Suburban, built at Flint) through 1991. From 1988 on C/K was used for the fourth generation "GMT400" design.

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  In 1990, Chevrolet introduced a high performance variant of the GMT400 under the Super Sport emblem called the 454SS. It was available only as a 2WD half-ton regular cab short box in Onyx Black only with a garnet red interior.

The 454SS was powered by a 454 cu in (7.4 L) V8 producing 230 hp (172 kW) and 385 lb·ft (522 N·m A 3-speed automatic transmission (Turbo Hydra-Matic 400) and 3.73 rear axle ratio added to the truck's performance.

The suspension was also upgraded with 32 mm (1.3 in) Bilstein gas-filled shock absorbers, a 32 mm (1.3 in) front stabilizer bar, and 12.7:1 fast-ratio steering gear assembly.

Unique exterior features included a front air dam with fog lights, special rims, decals displaying "454SS" on the bed sides, red trim emblems, and black painted grille, bumpers, and mirrors.

The interior was also unique with a special plush Garnet Red cloth with black trim, high-back reclining sport bucket seats, and center console.