17038-Customer Satisfaction Program. General Motors has discovered an inadvertent error on the window label of certain vehicles, equipped with a 4.8L Vortec V8 engine (RPO L20). The window label on these vehicles contained the correct 4.8L Vortec V8 engine information at the top of the label where the engine is identified. In the Standard Equipment Notes section of the window label, however, the label also incorrectly referenced a 6.0L engine. This label may lead to confusion over which engine the vehicle is equipped with. General Motors is providing customers with a corrected window label.