Serial numbers
Serial Numbers for 1971:

Description/Example
242371P100001

24237 - Model number (24237 - hardtop,
24267 - convertible)
1 - Last digit of model year
P - Assembly plant (P - Pontiac,  A- Atlanta,   
B - Baltimore, G - Framingham, R - Arlington,
Z - Freemont)
100001 - Consecutive sequence numbers

Serial number plate is attached to the driver's side of
the dash, visible through the windshield.
Serial Numbers for 1972:

Description/Example
2D37T2P100001

2 - Pontiac
D - Lemans
37 - Body style (27 - coupe, 37 - hardtop)
T - Engine code
2 - Last digit of model year
P - Assembly plant (P - Pontiac,  A- Atlanta,   
B - Baltimore, G - Framingham, R - Arlington,
Z - Freemont)
100001 - Consecutive sequence numbers

Serial number plate is attached to the driver's side of
the dash, visible through the windshield.
Serial Numbers for 1973:

Description/Example
2D37Y3P100001

2 - Pontiac
D - Lemans
37 - Body style (37 - hardtop)
T - Engine code
3 - Last digit of model year
P - Assembly plant (P - Pontiac,  A- Atlanta,   
B - Baltimore, G - Framingham, R - Arlington,
Z - Freemont)
100001 - Consecutive sequence numbers

Serial number plate is attached to the driver's side of
the dash, visible through the windshield.
Serial Numbers for 1974:

Description/Example
2Y17N4W100001

2 - Pontiac
Y - Ventura
17 - Body Style (17 hatchback, 27 coupe)
N - Engine Code
4 - Last digit of model year
W - Assemble Plant (W-Willow Run, L- Van
Nuys)
100001 - Consecutive sequence numbers

Serial number is located on plate attached to driver's
side of dash.  It is visible through the windshield.
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