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Discussion Starter · #1 ·
so, im decoding my RPO codes, and so far all is well...except when i got to the engine code which is "L31." this is what it says:

L31 : 409 CID V8 400HP (SPECIAL HIGH PERFORMANCE-SOLID LIFTER CAM)

i thought that it had a Vortec 350? can anyone clear this up for me please, thanks!
 
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