Repairing a rusted, cracked or perforated left frame rail on certain Chevrolet and GMC trucks can be a challenging job often requiring specialized skills and equipment, or settling for and adapting salvaged frame components. This Dorman OE FIX frame rail repair kit allows for a more cost-effective and labor-saving replacement of just the failed section with a heavy-gauge steel replacement rail that is designed to be welded into place after proper preparation.