The High Sierra model included seats trimmed in custom cloth and vinyl with a full-foam seat cushion and folding backrest. Reinforced stake pockets, for the addition of stake racks, are standard. A tight fitting tailgate helps keep bulk loads in the box. Seven flush steel skid strips hold the wood floor in place yet allow for expansion with changes in temperature and humidity. Smooth interior walls are ideal for many applications. The 6.5ft box is equipped with standard wood floors that provide good footing for livestock and permit nail-downs to help prevent cargo shifting. Neutral was also available for use of the PTO.įenderside models came with rigid, double-wall cab construction features side steps located between the rear fender and cab back that permit easy side loading and cargo handling for both work or recreation. Low and Low Loc applied reduction gearing with or without lock, depending on the mode selected. The system could be manually shifted into High Loc which locked the center differential for a locked 50:50 torque split. In High the center differential was unlocked and allowed the front and rear propeller shafts to slip as needed for full-time operation. Five positions were provided: High Loc, High, Neutral, Low, and Low Loc. Exposed brake lines were wrapped in steel as standard.įull-time four-wheel drive pickups featured a two-speed New Process 203 transfer case with center differential and lock. K-Series pickups also featured an off-road oriented design, with the transfer case bolted directly to the transmission and running gear tucked up as high as possible under the vehicle to reduce the chances of snagging vital components on obstacles, as well as to achieve a low silhouette and optimal ground clearance. Braking controls included front self-adjusting disc brakes with rear finned drum brakes.Īll new K-Series pickups featured four-corner Vari-Ratemulti-leaf springs, front live axle with symmetrical (inline) shock absorber geometry, and the Load Control rear suspension system. Steering controls included variable-ratio recirculating ball steering gear with optional hydraulic power assist. Third-generation Square-body K-Series pickups gained an all-new, high tensile strength carbon steel ladder type frame with "drop center" design. Other safety features included soft-padded interior panels for appearance and safety, 3,329 square inches of tempered and laminated safety glass, prismatic rearview mirror, six turn-signal indicator lamps with asymmetrical flash, four-way hazard function, and lane departure function. The third safety advancement was the introduction of dual front lap-and-shoulder safety belts with emergency locking retractors for outboard occupants. The first was the standard passenger-side sideview mirror, and the second was the energy-absorbing collapsible steering column. Safety updates were at the forefront of these third gen trucks. You’ll also find Chestnut wood grained inserts on the dashboard. Soft touch materials were used throughout the passenger cabin, such as the dashboard, doors (arm rests), steering wheel, and shift levers. The new rounded lines moniker was evident of the new cab overhaul.
#Sierra generations family tree v8.5a series#
In 1977 the third gen square body GMC series truck was four years into production and had seen several advanced updates to the previous truck designs of generations past. MORE VIDEOS HERE: 1977-gmc-k15-high-sierra-1 MILES: 3,718 rolled 103,718(total miles unknown)