[factorystock]

Thanks for posting these rare photos, learning about GM history is never ending. IMO, the full size Olds ( introduced one year earlier than the pickup) was clearly the inspiration for the pickup. Windshield, vent windows, rounded fenders, lower body contours, raked back rear quarter panel and slanted hood similarities were mentioned on earlier posts, however the first concept photo offers even more evidence : The outer edge of front bumper is curved upward just like on the car, but later dropped in revised photos.