I assume you are not going through the insurance company for this claim?
Check www.rockauto.com or your GM parts department. I replaced both of my regulators on my GMC Sierra pickup with parts from GM, at the time their prices were in line with the aftermarket suppliers.
If the price of a new unit doesn't work for you, shop used at local salvage yards or ebay.
Use anyone by GMPartsdirect, their shipping pricing policy is horrible.
Check www.rockauto.com or your GM parts department. I replaced both of my regulators on my GMC Sierra pickup with parts from GM, at the time their prices were in line with the aftermarket suppliers.
If the price of a new unit doesn't work for you, shop used at local salvage yards or ebay.
Use anyone by GMPartsdirect, their shipping pricing policy is horrible.