[factorystock]

Another clue as to whether your panel was ordered as a "custom" or ordered with separate "custom" features would be the absence of white door panels, right side sun visor and "Custom" emblems. Again, not really sure of how "custom" panels were built and not a big fan of brochure illustrations that have been doctored for use year after year as a source of credibility. Build sheets and or dealer invoices seem to be the only way to shed light on this obscure subject, unless another survivor panel appears on the scene, but won't be holding my breath for probably one of the rarest of the rare GMC models.