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Thanks Ed
View like this... ZV6 = M20 ZV7 = M21 ZV9 = M40 ZW1 = M22 It's very logic ![]() But for what GM Canada show the two code on the same paper. RPO M22= 4-speed H.D. transmission close ratio and IC ZW1 = 4-speed H.D. transmission close ratio RPO PL5= F70-14-4 PR tire -HWY-OE-B/wall white lettering. IC ZP1 = C.O.P.O Tires RPO for Regular production option and IC for Internal Code This IC code it's only for canadian COPO or All USA and CDN COPO. This one is the best from GM ![]() RPO ZP3 Regular Production Option Special Order Paint and two dash - - on the tag for Paint Deleted.(USA and CDN) ![]() |
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