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2003CHEVY MONTE CARLO V6 3.8L ENGINE With 12583826 ECM. GM installed this 12583826 PCM in the above vehicle as well as several other GM applications. This was possible because each of these models received their specific programming from the factory.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.