Do a search for GM RPO code list, there are a few around. Here's one.

http://www.longroof.info/pdf/rpo.pdf

Like Dodge the codes mean different things over time so if something doesn't make sense try a different list or google for the specific code.

There's not just a single interior code and not all under a single number group so you pretty much have to go through to codes until you fid the one(s) you need.

19D might be what you want tho.

Last edited by 5thAve; 07/09/20 03:05 PM.