4×4S.ORGTHE REGISTRY NAMED MODEL · 1955–59
NAMED MODELUnited States

NAPCO Powr-Pak 4x4 (1955–59)

The four-wheel drive before the K-series: the Northwestern Auto Parts Company’s Powr-Pak conversion of Chevrolet and GMC Task Force pick-ups, panels and Suburbans, sold through Chevrolet dealers and factory-orderable from 1957 to 1959, with a driven Dana front axle and a divorced transfer case.

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Sources & evidence
NAPCO Powr-Pak 4x4 (1955–59) — 1958 Chevrolet Apache 31 with the NAPCO Powr-Pak four-wheel driveMr.choppers · CC BY-SA 3.0 ↗
BASE VEHICLEK10 / K20 (1960–72)BUILT BYChevrolet (General Motors), NAPCO (Northwestern Auto Parts Company)IN SERVICE1955–59PRODUCTIONNot publishedLAYOUT4 wheels · 115″

The record

NAPCO of Minneapolis had converted trucks since the 1940s and its Powr-Pak on the 1955–59 Chevrolets was the marque’s first four-wheel drive; GM bought the rights and built its own K-series from 1960. Powr-Pak Task Force trucks are the most collected early Chevrolet 4x4s.

Specification

MANUFACTURERChevrolet (General Motors) ↗, NAPCO (Northwestern Auto Parts Company) ↗
Company (NAPCO), Minneapolis, on Chevrolet trucks
MANUFACTURED1955–59
ENGINEChevrolet 235 six; 265 and 283 V8s
PRODUCTION RUNNot published
COUNTRY OF ORIGINUnited States
STATUSout of production
RECORD KINDNamed model
MODEL LINEK-series and Silverado 4x4
FAMILYK-series and Silverado 4x4
WHEELS4
NOMINAL WHEELBASE115″
BODY STYLEfleetside

Catalogue fields describe the vehicle's structure and body as this registry records it. They are not certified factory measurements, and no performance figures are published here.

Variants & colours

Base model variants

AI rendering impression

An AI rendering impression starts from a 3D model of this vehicle, which an image model then paints into a scene. It is an artist's impression of the type, made to give a feel for the vehicle in its element — not a photograph, and not a record of any particular vehicle.

Proportions, fittings, markings, colours and the setting can all drift from the original in the process. For the vehicle's actual details, rely on the specification, the photographs and the cited sources on this page.

Sources

  1. 1NAPCO ↗Wikipedia · accessed 2026-09-22SOURCE
  2. 2Chevrolet C/K ↗Wikipedia · accessed 2026-09-22SOURCE

Registry record updated 2026-09-22 · status: researched