Group Option Codes

Codes are listed by group and in alphabetical order within the group. A given Chevelle may have one or more from a single group or may not have any from a given group at all.

If you know of any codes not listed here, please email me with details - (1) year, (2) body date, (3) plant, (4) group number, (5) letter code, (6) option if known, and a photo of the tag would be appreciated.

Group 1 - No number precedes Group 1
D ~ Power convertible top [RPO C06]E ~ Tinted glass (all) [RPO A01]
F ~ Power bench seat [RPO A41]G ~ Power tailgate [RPO A33]
O ~ Two-tone paint [RPO 950]T ~ Power bucket seat [RPO A46]
W ~ Tinted windshield (only) [RPO A02]X ~ Power windows [RPO A31]
Group 2 - preceded by the number "2"
K ~ Air conditioning [RPO C60]L ~ 4-speed transmission [RPO M20]
M ~ Powerglide transmission [RPO M35]N ~ AM/FM Stereo multiplex [RPO U79]
P ~ Comfort & Convenience group  - Type A [RPO Z01] **R ~ Rear speaker [RPO U80]
S ~ Rear antenna [RPO U73]Y ~ Unknown - found on tags from Kansas City
Group 3
B ~ Rear window defogger [RPO C50]C ~ Instrument panel pad [RPO B70]
Group 4
F ~ Comfort & Convenience group [RPO Z01/Z13] *M ~ Body modifications [RPO Z16]
P ~ Unknown - found on tags from Euclid, Kansas City, and Framingham 
Group 5
O ~ Suspect seat belt delete [RPO A62]W ~ Custom deluxe seat belts with retractors [RPO A49]
Y ~ Custom deluxe rear seat belts (RPO A47) **** 

 * The Comfort & Convenience group varied with the series. Type A is for 135, 136, 137, and 138xx series while Type B included a glove box lamp with 131, 132, 133, and 134 series.

** The letter "P" isn't known for certain on Framingham Chevelles. It was initially believed to be for RPO Z01/Z13, Comfort & Convenience Group Type A or Type B depending on the particular series. However, a 300 2-door sedan has been documented with "P" in group 2 but it does not have a glove box lamp nor backup lamps, only a driver side door mirror.

*** The letter "L" isn't known on Atlanta & Framingham Chevelles. It is believed this letter "L" is not in group 5 as it has been found on several tags with no group 5 designation.

**** Entered production March, 1965