1971 Chevelle Protect-O-Plate Warranty Card (Baltimore, MD)

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Decode your 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.
An L6 Nomad would be 1, Standard would be 3, and Malibu would be 5.

[ Arlington ] | [ Baltimore ] | [ Kansas City ] | [ Van Nuys ] | [ Oshawa ]

1st line:
136371B101977 ~ VIN
13637 ~ Chevelle (13), Malibu V8 (6), 2-door sport coupe (37)
1 ~ Model Year of Production: 1971
B ~ Final Assembly Plant: Baltimore, MD.
101977 ~ Sequence Assembly Number, 1,977th 1971 Chevelle at Baltimore

2nd line:
T0727CCC ~ Engine Plant: Tonawanda Engine Plant, July 27 (0727), 307/200hp w/Powerglide or TH350 (CCC)
C1K31 ~ Transmission Number: Cleveland Powerglide (C), 1971 (1), July 31 (K31)

3rd line:
GNC218A ~ Rear Axle Number: 3.08:1 ratio (GN), Buffalo (C), August 6 (218*), Day Shift (A)
R ~ Carburetor Source: Rochester

Options
1	3
G	H	I	J	K	L	M

G-1 ~ Power Steering [RPO N40]
H-3 ~ Radio [RPO U63/U69/U79] **

H ~ Vehicle Build Month: August

1st line:
138571B113026 ~ VIN
13857 ~ Chevelle (13), Monte Carlo V8 (8), 2-door sport coupe (57)
1 ~ Model Year of Production: 1971
B ~ Final Assembly Plant: Baltimore, MD.
113026 ~ Sequence Assembly Number, 13,026th 1971 Chevelle at Baltimore

2nd line:
T0827CGC ~ Engine Plant: Tonawanda Engine Plant, August 27 (0827), 350/245hp w/TH350 (CGC)
Y1K27 ~ Transmission Number: Toledo Powerglide (Y), 1971 (1), July 27 (K27)

3rd line:
GCC244- ~ Rear Axle Number: 2.73:1 ratio (GC), Buffalo (C), August 29 (244*)
R ~ Carburetor Source: Rochester

Options
1		3
G	H	I	J	K	L	M

G-1 ~ Power Steering [RPO N40]
I-3 ~ Radio [RPO U63/U69/U79] (any one of the three)

L ~ Vehicle Build Month: November

1st line:
138571B124522 ~ VIN
13857 ~ Chevelle (13), Monte Carlo V8 (8), 2-door sport coupe (57)
1 ~ Model Year of Production: 1971
B ~ Final Assembly Plant: Baltimore, MD.
124522 ~ Sequence Assembly Number, 124,522nd 1971 Chevelle at Baltimore

2nd line:
T1210CGC ~ Engine Plant: Tonawanda Engine Plant, December 10 (1210), 350/245hp w/TH350 (CGC)
Y1T10 ~ Transmission Number: Toledo Powerglide (Y), 1971 (1), December 10 (T10)

3rd line:
GC249- ~ Rear Axle Number: 2.73:1 ratio (GC), Buffalo (C), September 06 (249*)
R ~ Carburetor Source: Rochester

Options
1		3
G	H	I	J	K	L	M

G-1 ~ Power Steering [RPO N40]
I-3 ~ Radio [RPO U63/U69/U79] (any one of the three)

L ~ Vehicle Build Month: November

1st line:
136371B125596 ~ VIN
13637 ~ Chevelle (13), Malibu V8 (6), 2-door sport coupe (37)
1 ~ Model Year of Production: 1971
B ~ Final Assembly Plant: Baltimore, MD.
125996 ~ Sequence Assembly Number, 25,996th 1971 Chevelle at Baltimore

2nd line:
T0914CLA ~ Engine Plant: Tonawanda Engine Plant, September 14 (0914), 402/300hp w/manual transmission (CLA)
P1T07 ~ Transmission Number: Muncie (P), Year 1971 (1), December 07 (T07)

3rd line:
CFC351 ~ Rear Axle Number: Positraction 3.31:1 ratio (CF), Buffalo (C), December 17 (351*)
R ~ Carburetor Source: Rochester (4-bbl)

Options
1	1	3	3
G	H	I	J	K	L	M

G-1 ~ Power Steering [RPO N40]
H-1 ~ Power Brake [RPO J50]
I-3 ~ Radio [RPO U63/U69/U79] (any one of the three)
J- ~ Disc Brakes [RPO J52]

L ~ Vehicle Build Month: November
It should also be noted that no production numbers are reported for October or November; the one exception is production numbers were reported for Arlington in November.

Owner/dealer info: Original owner's name/address removed for obvious privacy reasons

1st line:
136371B126714 ~ VIN
13637 ~ Chevelle (13), Malibu V8 (6), 2-door sport coupe (37)
1 ~ Model Year of Production: 1971
B ~ Final Assembly Plant: Baltimore, MD.
126714 ~ Sequence Assembly Number, 26,714th 1971 Chevelle at Baltimore

2nd line:
T1214CJD ~ Engine Plant: Tonawanda Engine Plant, December 14 (1214), 350/240hp w/TH350 (CJD)
Y1T17 ~ Transmission Number: Toledo TH350 (Y), Year 1971 (1), December 17 (T17)

3rd line:
KDC355 ~ Rear Axle Number: 2.73:1 ratio (KD), Buffalo (C), December 21 (355*)
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 Brake [RPO J50]
I-3 ~ Radio [RPO U63/U69/U79] (any one of the three)
J-3 ~ Disc Brakes [RPO J52]
K-1 ~ Air Conditioning [RPO C60]

Owner/dealer info: Original owner's name/address removed for obvious privacy reasons

1st line:
134371B168953 ~ VIN
13437 ~ Chevelle (13), Standard V8 (4), 2-door sport coupe (37)
1 ~ Model Year of Production: 1971
B ~ Final Assembly Plant: Baltimore, MD.
168953 ~ Sequence Assembly Number, 68,953rd 1971 Chevelle at Baltimore

2nd line:
T0303CCC ~ Engine Plant: Tonawanda Engine Plant, March 03 (0303), 307/200hp w/Powerglide or TH350 (CCC)
B1C04 ~ Transmission Number: Cleveland TH350 (B), Year 1971 (1), March 04 (C04)

3rd line:
CHC054 ~ Rear Axle Number: Positraction 2.73:1 ratio (CH), Buffalo (C), February 23 (054)
R ~ Carburetor Source: Rochester (2-bbl)

Options
1	1	3
G	H	I	J	K	L	M

G-1 ~ Power Steering [RPO N40]
H-1 ~ Power Brake [RPO J50]
I-3 ~ Radio [RPO U63/U69/U79] (any one of the three)

C ~ Vehicle Build Month: March

Owner/dealer info: Original owner's name/address removed for obvious privacy reasons

1st line:
136371B195521 ~ VIN
13637 ~ Chevelle (13), Malibu V8 (6), 2-door sport coupe (37)
1 ~ Model Year of Production: 1971
B ~ Final Assembly Plant: Baltimore, MD.
195521 ~ Sequence Assembly Number, 95,521st 1971 Chevelle at Baltimore

2nd line:
T0415CLB~ Engine Plant: Tonawanda Engine Plant, April 15 (0415), 402/300hp w/TH400 (CLB)
71D43 ~ Transmission Number: 1971 model year, 402 engine code (D), February 12 (43rd day of calendar year)

3rd line:
CHC092B ~ Rear Axle Number: Positraction 2.73:1 ratio (CH), Buffalo (C), April 1 (092 Julian date) *
R ~ Carburetor Source: Rochester

Options
1	1	3	3
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] (any one of the three)
J-1 ~ Disc brakes [RPO J52]

D ~ Vehicle Build Month: April

Owner/dealer info: Original owner's name/address removed for obvious privacy reasons

Courtesy Joe Saia

1st line:
136371B235969 ~ VIN
13637 ~ Chevelle (13), Malibu V8 (6), 2-door sport coupe (37)
1 ~ Model Year of Production: 1971
B ~ Final Assembly Plant: Baltimore, MD.
235969 ~ Sequence Assembly Number, 135,969th 1971 Chevelle at Baltimore

2nd line:
T0624CCC ~ Engine Plant: Tonawanda Engine Plant ~ June 24 (0624), 307/200hp w/Powerglide or TH350 (CCC)
B1H15 ~ Transmission Number: Cleveland TH350 (B), Year 1971 (1), June 15 (H15)

3rd line:
GHC173 ~ Rear Axle Number: 2.73:1 ratio (GH), Buffalo (C), June 22 (173 Julian date) *
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] (any one of the three)
K-1 ~ Air Conditioning [RPO C60]

G ~ Vehicle Build Month: July

Owner/dealer info: Original owner's name/address removed for obvious privacy reasons

* The dates are counted from January 1, 1970
** There is no number 3 in the H position. New Car Record shows car was ordered with Power Steering and Radio.