See Figures 1 through 16
The vehicle serial number is stamped on a plate found in the upper center portion of the firewall on 1970-78 models. It can also be found stamped on a metal tag, fastened to the driver's side door pillar (all models).
On 1979-88 models, the number is located on the right front fender apron in the engine compartment (behind the wheel arch). All 1979-88 models also have the vehicle identification number stamped on a plate attached to the left side of the instrument panel. The plate is visible through the windshield.
Fig. Fig. 1: The VIN plate is located on the firewall-1970-78
Fig. Fig. 2: The vehicle identification number is also found on the driver's side door pillar-1970-78
Fig. Fig. 3: The vehicle identification number can be found on the left side of the instrument panel, visible through the windshield-1979-88
Fig. Fig. 4: A common vehicle identification number plate
Fig. Fig. 5: The VIN plate is located on the right front fender apron-1979-88
The vehicle identification (model variation codes) may be interpreted as follows:
1970-71: All models are marked PL521TU. The first letter, P, indicates the L16 engine. The second letter, L, means left hand drive, 521 is the model number. The first suffix letter, T, indicates a floor shift. The second suffix letter, U, indicates a U.S. and Canada specification model.
1972: All models are marked PL620TU. The only change from 1970-71 is the model number, 620.
1973-74: The prefix letters remain the same, PL, with P indicating the 1600cc engine through mid 1973, or the 1800cc engine thereafter. The next three numbers, 620 are the model number. Four suffix letters are used. The first is either a K or a blank; K indicates an automatic transmission. The second and third suffix letter are T and U, with the same meaning as in earlier year. The fourth suffix letter is an H or blank; H indicates that no heater is installed.
1975-76: Three prefix letters and four suffix letters are used. The first letter is an H, for the L20B engine. The second letter is L, for left hand drive. The third letter is either a G or a blank; G is for long wheelbase (long bed) trucks. The next three numbers, 620, are the model number. The four suffix letters remain the same as in 1973-74, with the exception of the last letter in 1976, which may be a V or a blank; V indicates a California model.
1977-79: Four prefix and four suffix letter are used. The first letter is a K or a blank; K indicates a king cab model. The second, third, and fourth letters are the same as those used in 1975-76. The next three numbers are the model number, 620. The first suffix letter is either a K, an F, or a blank; K indicates automatic transmission, F indicates a 5-speed, a blank indicates a 4-speed. The second and third suffix letter, T and U, have the same meaning as in earlier years. The last letter is either a V, an N, or a blank; V indicates a California model, N indicates a Canada model, a blank indicates a 49 States model.
1980-81: A four letter prefix for 2-wheel drive models and a five letter prefix for 4-wheel drive models followed by a three digit code denoting the truck series is used. The suffix for these years is either four letters for 2-wheel drive or two letters for 4-wheel drive.
1982-83: All truck models use a five letter prefix followed by the model designation, then a four letter suffix explained in the illustration.
1984-86 (720 Series): All truck models use a five letter prefix followed by the model designation, then a five letter suffix; the last two letters separated by a slash, explained in the illustration.
1986-88 (D21 Series): All truck models use a four letter prefix followed by the model designation, then a five letter suffix explained in the illustration.
The serial number on all 1970-80 models consists of a series identification (see chart) followed by a six digit production number. The serial number on all 1981-88 models has been changed to the 17-digit format. The first three digits are the World Manufacturer Identification number. The next five digits are the Vehicle Description Section (same as the series identification number above). The remaining nine digits are the production numbers.
Fig. Fig. 6: Serial number locations-1979-86 models (720-D series)
Fig. Fig. 7: Serial number locations-1986-88 models (D21-D series)
Fig. Fig. 8: Vehicle Identification chart
Fig. Fig. 9: Model variation codes-1973-74
Fig. Fig. 10: Model variation codes-1975-76
Fig. Fig. 11: Model variation codes-1977-79
Fig. Fig. 12: Model variation codes-1980-81
Fig. Fig. 13: Model variation codes-1982-83
Fig. Fig. 14: Model variation codes-1984-86 (720-D series)
Fig. Fig. 15: Model variation codes-1986-88 (D21-D series)
Fig. Fig. 16: The new 17-digit VIN is used on all 1981-88 models