questions on 2.8 to 3.4 conversion (Page 3/3) Blacktree DEC 26, 12:25 PM quote Originally posted by Dennis LaGrua: The L32 engine is the 3800SC series III engine. It's also the iron-head 3.4 V6. GM likes to recycle engine codes. BillS DEC 28, 11:45 AM They do indeed, which can make it difficult to tell what someone is talking about. I saw an L32 turbo Buick from the 2000s as well. Were they afraid they would run out of numbers and letters.......? pmbrunelle DEC 28, 12:30 PM My understanding is that RPO codes are used during assembly, so that workers know what options to install in a car. As long as an RPO code is only recycled after the previous model stopped production, that should be OK, right?