Also, where do you look for the RPO (regular production options) codes? A: …The Trim Tag Model Number for 1967 Firebird deciphers as follows… 67- Year 2- Division (Pontiac) 2637- Style (26-Custom Trim, 37-Firebird Coupe) The “23” you mention refers to the VIN I.D. number (which didn’t denote Standard or Custom Trim). Regular Production Order (RPO) Codes ... Merchandised Package - Firebird . Y82. 1993. Merchandised Package - Trans Am Base. Rear bumper. Y87. 1996. By 1990, and with GM tired of the lighter 5.0 LX having its way with the Camaro and Firebird on the street and track, the G92 option was offered as a full "Performance Package" rather than simply a performance axle option (as prior to 1990) with G92 consisting of multiple performance upgrades and weight-saving options, and the manual 5-speed ...

27. SSs did not ALL go to SLP starting in 98. Y2Y was the RPO code that sent them to SLP for additional options 28. SS option did not "include" the Synthetic oil package, it was a SLP only Option 1999 1. 1999-2000 cars switched to 26 lb fuel injectors 2. Cylinder heads and valve covers redesigned to have center bolts instead of perimeter bolts.