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Exception Control Letters
-- for RPOs other than Paint and Custom Equipment

Some notes on RPOs and ECLs:
  • Follow this link for an explanation of ECLs
  • In the table, RPO name and number are in blue, and ECLs are in back.
  • GM changed the RPO numbering system in 1963.
  • An ECL code was used for all years under which it is placed. For example, for Custom Chrome, for the years 1961,62 and 63, there were two ECLs, 'U' and 'V' and in 1964-65 the two ECLs used were 'AA' and 'AB'.
  • The assignments to RPO configurations are based upon available evidence and available Car Shippers and Window Stickers available here. "WS" = window sticker; "CS" = Car Shipper
  • While this seems to be a complete list of the ECLs used with each RPO, the specific configurations corresponding with many of the ECLs are not yet clear. For example, RPO 667/M35 (powerglide transmission) has three ECLs in 1964, and this would seem to relate to the introduction of RPO L62 (high performance engine), but the difference between ECLs 'AB' and 'BB' is unresolved.
Quick Links to RPOs
Battery, 40 amp-hr
355 -- $5.00
61 62 63 64 65
A --  
This battery became standard equipment as of 4/17/61
Hazard Warning Switch
-- V74 $11.00
61 62 63 64 65
-- AA --
 
Custom Chrome
393 V37  
61 62 63 64 65
V U AA without 132/P01: $30.00
U V AB with 132/P01: $20.00
Custom Chrome would have been used with R1205/44/54 or R1206 with standard trim. Combined with RPO 132/PO1 (Wheel Covers), Custom Chrome was less expensive since the chrome hubcaps were not included, being replaced with the wheelcovers.
"393V" w/o RPO 132: WS 61-102759
Radio
123 U60 1961: $50.00
1962-65: $44.50
61 62 63 64 65
A AA with std 3-Spd transmission
B AB with 667/M35 (powerglide transmisson)
Different wiring harnesses were used for standard vs automatic transmissions.
"123A": CS 61-102168
"U60AA" with 64-103971 (std transmission)
"U60AB" with M35: WS 64-106131.
Wheel Covers
132 P01 A-D, AA: $10.00
K-N, AB: $8.00
61 62 63 64 65
A AA R10
B     R10
C     R10
D     R10 w/o RPO 431
K AB R1206 w/ RPO 431/Z60
L     R1206 w/ RPO 431/Z60
M     R1206 w/ RPO 431/Z60
N     R1206 w/ RPO 431/Z60
When ordered for R1206 along with RPO 431/Z60, RPO P01 was less expensive since the wheel covers substituted for the chrome hubcaps of the deluxe option. It is not clear why there were 4 ECLs in 1961-62 for each option.
R1206 with "132D":CS 61-102168
Powerglide Transmission
667 M35 $145
61 62 63 64 65
A AA w/ std engine
-- AB w/ L62 & G81?
-- BB ??
"M35AB" with RPO L62 & G81: WS 64-106131 & 64-102587
4-Speed Transmission
652 M20 1961-62: $60.00
1963-65: $85.00
61 62 63 64 65
A AA  
"M20AA": WS 65-100351
"652A": CS 61-110774 & WS 61-102759
Ventilation, Special Crankcase
243 -- $5.00
61 62 63 64 65
K --  
"243K": CS 61-102168
Engine, 102HP
-- COPO 9552 --  
61 62 63 64 65
-- A -- w/ 3-spd or M20 $32.30
-- B -- w/ 3-spd or M20 + HD clutch $37.70
-- C -- w/ M35 $26.90
"9552A" observed in CS 61-F113654.
Engine, High Performance
-- L62 $25.00
61 62 63 64 65
-- AA  
"L62AA" is observed in window stickers VIN 64-106131, 64-103971 & 65-100351.
Generator, 35 Amp
650 K71 -- $35.00
61 62 63 64 65
B C AA --  
-- AB -- w/ L62?
Possibly there were different ECLs for the standard engine vs RPO L62 engine
3R126F113654 - K71C (102HP engine)
Generator - 47 Amp
-- K84 $15.00
61 62 63 64 65
-- AA  
 
Air Cleaner, Pre-Oil Bath
-- K47 $6.00
61 62 63 64 65
-- A AA  
K47A is found with 63-113654 (R1206)
K47AA is found with 64-103971 (R1205)
Axel, Rear Positraction
-- 481 G81 $35.00
61 62 63 64 65
-- K K
R1206 64-102587 (std trans)
AA 3-speed
-- L L BA
R1206 64-106131(M35)
powerglide
-- M
R1206 63-F113654(M20)
CA
R1206 65-100351(M20)
4-speed
 
Springs, Heavy-Duty Front (R1206)
255 F60
61 62 63 64 65
C AA $10.00
D- w/ RPO 420 -- $3.00
"AA" in window sticker VIN 64-102587
Shock Absorbers, Heavy-duty, Front (R1205/44/54)
213 F51 -- $7.00
61 62 63 64 65
J -- R1244
W
"213W": R1205 61-113280 & 62-F1000082
AA -- R1205/54
The 'J' ECL dissappears with the demise of R1244
Doors, Left-side
645 E85 $75.00
61 62 63 64 65
A AA 1205
B
"E85B" - R1206 63-113654
BA 1206
The side doors for R1205 and R1206 were different. Only the doors for R1205 have the square removable plate allowing acccess to the latching assembly.
Platform, Level Floor
134 E82   $45.00
61 62 63 64 65
B AA -- 1254
A -- 1244
 
Mirror, Outside, West Coast Jr
-- D29 A,B,AA,AB: $5.00
C,D,BA.BB: $11.00
61 62 63 64 65
-- A AA All-left side only
-- B AB -- R1205-left side only; delete D32*
-- C BA
R1206 64-106131
R1206-both sides
-- D BB
R1205 64-103971
-- R1205-both sides; delete D32*
*The discontinuance of AB and BB in 1965 supports that these were used for R1205. With the elimination of the rear door windows in 1963, a left side D32 mirror became stock for R1205; However, this mirror was deleted if the D29 mirror was ordered.
"D29BA" is associated with R1206 R & L side mirrors on the window stickers for 64-106131, 64-102587, & 65-100351.
Mirror, Outside, Round
210 D32 A, AA: $9.00
B, BA, C, CA: $4.50
61 62 63 64 65
A AA AA R1206/54 both sides
B BA BA R10-left side only
-- C CA -- R10-right side only*
* it is probable that the right-side only option was added for R1205, for which the left-side mirror became standard in 1963.
Heater/Defroster, Gas
128 C45 $85.00
61 62 63 64 65
A A AA  
B B AB  
C C AC  
D D AD  
  E AE  
  F AF  
  G AG  
  H AH  
  I AI  
  J AJ  
  K AK  
  L BA  
  M BB  
  N BC  
  O BD  
  P BE  
  Q BF  
  R BG  
  S BH  
  T BI  
  U BJ  
  V BK  
There were different main body harnesses for GH + std vs auto transmission; Pickups lacked rear heat vent
Heater/Defroster, Direct Air
138 C40 $69.00
61 62 63 64 65
A
"138B"
R1205 61-F113280 (std trans)
  AA --
B
R1206 61-F106181 (std trans)
R1206 61-110774 (4-spd trans)
R1206 61-102759 (4-spd trans)
B AB
R1205 64-103971 (std trans & L62)
--
C   BA --  
D D BB --  
E   CA
R1206 64-105029 (M20 & L62)
64-107309(M20 & L62)
F F CB  
G   CC
R1206 65-100351 (M20, G81 & L62)
 
H
R1206 61-102168 (std trans)
H CD
  I CE  
  J
"138J"
R1205 62-F100082 (std trans)
R1205 62-F115911 (std trans)
R1254 62-F104405 (std trans)
"C40J"
R1205 63-F103052 (std trans)
R1205 63-F111662 (std trans/G81)
DA  
  K
"C40K"
R1206 63-F107178 (std trans/G81)
R1206 63-F108705 (std trans/G81)
R1206 63-F113654 (4-spd trans/G81)
DB  
  L DC  
  M DD  
  N DE  
  O EA  
  P EB  
  Q EC  
  R ED
R1206 64-102587 (M35, G81 & L62)
 
  XA EE  
  XB FA  
  XC FB
R1206 64-106131 (M35, G81 & L62)
 
  XD FC  
  XE FD  
  XF FE  
  XG    
  XH    
  XI    
  XJ    
  XK    
  XL    
  XM    
There were different main body harnesses for direct air heater with std vs auto transmission; Pickups lacked rear heat vent. The Model assignments shown are based upon window stickers.
Windshield Washer
130 -- $10.50
61 62 63 64 65
A --  
 
Wiper with Washer, Two-Speed
355 C14 $15.00
61 62 63 64 65
A AA  
"355A": WS 61-102759 & CS 61-102168
"C14AB": WS 64-102587
Seat, Supplemental (3rd rear seat; R1206 only)
269 A59 1961-62: $35.00
1963-65: $50.00
61 62 63 64 65
A
R1206: 61-F106181, 61-110774, 61-102759 & 61-102168
AA  
B C -- --  
unclear why there are two ECLs for '61 & '62
Seat, Auxillary, Front (R1205 only)
264 A57 $38.00
61 62 63 64 65
-- C C AA --  
 
Seat, Full Front (R1205 only)
482 A54   $25.00
61 62 63 64 65
A AA --  
A54AA with 64-103971 (R1205)
No Seat Belts
-- A62 $10.OOCR
61 62 63 64 65
-- AA --  
 
Seat Belt, Deluxe, With Retractor
-- A49 $7.00
61 62 63 64 65
-- AB --  
R126S106131 - A49AB
Seat Belt -- Deluxe (1206)
-- 148 A37   C, AA: $9.50
D, BA: $17.50:
BB:$3.00
61 62 & 63 64
(8/19/63)
64
(12/9/63)
65
-- C AA -- -- driver only
-- D BA -- -- driver and passngr
-- BB -- Driver or passenger
A37BB - 4R126S105029
Glass, Rear Door (1205)
-- A12 $12.00
61 62 63 64 65
-- A AA --  
A12AA found with 64-103871 (R1205)
Glass, Laminated
370 A09 $5.00
61 62 63 64 65
A AA