1971 Chevelle Protect-O-Plate Warranty Card
I have more examples but only list a few examples on this page. If you request help with yours, contact me and I'll be glad to answer any questions you have. Include a photo of the Protect-O-Plate as plants often deviate during the model year.
You'll notice some plants used a three letter engine suffix code while some used a two letter code; Arlington even used both for the 454, LS5 engine - PD and CPD. All examples, so far, also used a three letter suffix code on the rear end axle ratio code.
You'll also notice that some plants code the rear end with the assembly plant first followed by the rear axle code and some will code the rear axle code first followed by the assembly plant.
Note: GM offers 2 explanations on decoding the VIN.
Using the common 13637 as an example:
1. When describing the VIN plate: 1 ~ Chevrolet Division, 36 ~ Malibu
V8, 37 ~ 2-door sport coupe
...and...
2. When describing the POP: 13 ~ Chevelle, even number (2,4,6,8) is
a V8 - odd number (1,3,5) is a L6, 37 ~ 2-door sport coupe. The engine
designations of 2, 4, 6 or 8 for a V8 engine, and 1, 3, or 5 for a L6
engine was determined by the series.
A V8 Nomad would be 2, Greenbrier/Standard would be 4, Concours/Malibu
would be 6, and Concours Estate/Monte Carlo would be 8.
A L6 Nomad would be 1, Standard would be 3, and Malibu would be 5.
Arlington, Texas

1st line:
136371R121242 ~ VIN
13637 ~ Chevelle (13), Malibu V8 (6), 2-door sport coupe (37)
1 ~ Year of Production: 1971
R ~ Final Assembly Plant: Arlington, TX
121242 ~ Sequence Assembly Number, 21,242nd 1971 Chevelle at Arlington
2nd line:
T0918PD ~ Engine Number: Tonawanda (T) ~ September 18 (0918) ~ 454/270hp
w/TH400 (PD)
71183CF ~ Transmission Number: Year 1971 (71) ~ July 01 (183*) ~
Turbo Hydramatic 400 engine code 402/454 (CF)
3rd line:
CRU223B ~ Rear Axle Number: Buffalo (C) ~ 3.31:1 ratio (RU)
~ August 10 (223*) ~ Buffalo (B).
C ~ Carburetor Source: Carter
|
Options |
||||||
| 1 | 1 | 3 | 3 | 1 | ||
| G | H | I | J | K | L | M |
G - 1 ~ Power Steering [RPO N40]
H - 1 ~ Power Brakes [RPO J50]
I - 3 ~ Radio type
J - 3 ~ Disc Brakes [RPO J52]
K - 1 ~ Air Conditioning [RPO C60]
L ~ Vehicle Build Month: November
Owner/dealer info: Original owner's name/address removed for obvious privacy reasons.

1st line:
136671R173792 ~ VIN
13667 ~ Chevelle (13), Malibu V8 (6), 2-door convertible (67)
1 ~ Year of Production: 1971
R ~ Final Assembly Plant: Arlington, TX.
173792 ~ Sequence Assembly Number, 21,242nd 1971 Chevelle at Arlington
2nd line:
T0308CPD ~ Engine Number: Tonawanda (T) ~ March 08 (0308) ~ 454/365hp
w/TH400 (CPD)
352CF ~ Transmission Number: December 18 (352*) ~ Turbo
Hydramatic 400 engine code 402/454 (CF)
3rd line:
CRU0692 ~ Rear Axle Number: Buffalo (C) ~ 3.31:1 ratio (RU)
~ March 10 (069*) ~ 2nd shift
C ~ Carburetor Source: Carter
|
Options |
||||||
| 1 | 1 | 3 | 3 | 1 | ||
| G | H | I | J | K | L | M |
G - 1 ~ Power Steering [RPO N40]
H - 1 ~ Power Brakes [RPO J50]
I - 3 ~ Radio [RPO U63/U69/U79]
J - 3 ~ Disc Brakes [RPO J52]
K - 1 ~ Air Conditioning [RPO C60]
D ~ Vehicle Build Month: April
Owner/dealer info: Original owner's name/address removed for obvious privacy reasons.

Courtesy Scott Boyd
1st line:
136371R191307 ~ VIN
13637 ~ Chevelle (13), Malibu V8 (6), 2-door sport coupe (37)
1 ~ Year of Production: 1971
R ~ Final Assembly Plant: Arlington, TX.
191307 ~ Sequence Assembly Number, 91,307th 1971 Chevelle at Arlington
2nd line:
T0614CJD ~ Engine Number: Tonawanda (T) ~ June 14 (0614) ~ L48 350-4/270hp
w/TH350 (CJD)
Y1G09HW ~ Transmission Number: TH350 Toledo (Y), Year 197(1)
~ ?(G) ~ June 09 (09H) ~ Warren (W)
3rd line:
CKD1611 ~ Rear Axle Number: Buffalo (C) ~ 2.73 ratio (KD) ~
June 10 (161*), 1st shift.
R ~ Carburetor Source: Rochester (4-bbl)
|
Options |
||||||
| 1 | 1 | 3 | 3 | 1 | ||
| G | H | I | J | K | L | M |
G - 1 ~ Power Steering [RPO N40]
H - 1 ~ Power Brakes [RPO J50]
I - 3 ~ Radio [RPO U63/U69/U79]
J - 3 ~ Disc Brakes [RPO J52]
K - 1 ~ Air Conditioning [RPO C60]
F ~ Vehicle Build Month: June
Owner/dealer info: Original owner's name/address removed for obvious privacy reasons
Baltimore, Maryland

Courtesy Joe Saia
1st line:
136371B235969 ~ VIN
13637 ~ Chevelle (13), Malibu V8 (6), 2-door sport coupe (37)
1 ~ Year of Production: 1971
B ~ Final Assembly Plant: Baltimore, MD.
235969 ~ Sequence Assembly Number, 135,969th 1971 Chevelle at
Baltimore
2nd line:
T0624CCC ~ Engine Number: Tonawanda (T) ~ June 24 (0624) ~
307/200hp w/TH350 (CCC)
B1H15 ~ Transmission Number: TH350 Cleveland (B) ~ Year 1971 (1) ~ June 15 (H15)
3rd line:
GHC173 ~ Rear Axle Number: 2.73 ratio ( GH) ~ Buffalo (C) ~ June 22
(173*)
R ~ Carburetor Source: Rochester (2-bbl)
|
Options |
||||||
| 1 | 3 | 1 | ||||
| G | H | I | J | K | L | M |
G - 1 ~ Power Steering [RPO N40]
I - 3 ~ Radio [RPO U63/U69/U79]
K - 1 ~ Air Conditioning [RPO C60]
G ~ Vehicle Build Month: July
Owner/dealer info: Original owner's name/address removed for obvious privacy reasons
Van Nuys, California

1st line:
135371L123331 ~ VIN
13537 ~ Chevelle (13), Malibu L6 (5), 2-door sport coupe (37)
1 ~ Year of Production: 1971
L ~ Final Assembly Plant: Van Nuys, CA.
123331 ~ Sequence Assembly Number, 23,331st 1971 Chevelle at Van
Nuys
2nd line:
F1229CAB ~ Engine Number: Flint (F) ~ December 29 (1229) ~ 250/155hp
w/Powerglide (CAB)
C1M18 ~ Transmission Number: Powerglide (C) 1971 (1) ~ August 18
(M18)
3rd line:
GNC363 ~ Rear Axle Number: 3.08 ratio (GN), Buffalo (C), December
29 (363*)
B ~ Carburetor Source: Bay City
|
Options |
||||||
| 1 | 3 | |||||
| G | H | I | J | K | L | M |
G - 1 ~ Power Steering [RPO N40]
I - 3 ~ Radio [RPO U63/U69/U79]
A ~ Vehicle Build Month: January
Owner/dealer info: Original owner's name/address removed for obvious privacy reasons
* The dates are counted from January 1, 1970