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Discussion Starter · #1 ·
Does anyone know if you can swap the light duty radiator for the heavy duty radiator? My 2003 Impala LS 3800 has the light duty and is leaking, I would like to upgrade if there is a direct replacement with no modifications to the heavy duty one.

Light Duty Specs

Core size 30 5/16in x 15in x 5/8in Except (V08)

Heavy Duty Specs

Core size 30 5/16in x 15in x 13/16in, (V08)



As you can see both radiators are close in size. The only difference I can see by the buyers guide is the thickness of the core. My question comes in two parts; 1. Will that thickness difference be an issue? 2. Are the connections and mountings the same?
 
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