| 1 Nation Of Origin |
| 1 |
U.S.A. |
| 2 |
Canada |
| 3 |
Mexico |
| 2 Manufacturer |
| G |
General Motors |
| 3 Make & Type |
| A |
Chevrolet Bus |
| C |
Chevrolet Truck |
| J |
GMC Bus (Van) |
| K |
GMC MPV |
| N |
Chevrolet MPV |
| T |
GMC Truck |
| 8 |
Multi-purpose Passenger Vehicle |
| 4 GVWR & Brake System |
| B |
3001-4000/Hydraulic |
| C |
4001-5000/Hydraulic |
| D |
5001-6000/Hydraulic |
| E |
6001-7000/Hydraulic |
| F |
7001-8000/Hydraulic |
| G |
8001-9000/Hydraulic |
| H |
9001-10,000/Hydraulic |
| J |
10,001-14,000/Hydraulic |
| K |
14,001-16,000/Hydraulic |
| 5 Line & Chassis Type |
| C |
Conventional Cab 2-Wheel Drive |
| R |
Conventional Cab 2-Wheel Drive |
| V |
Conventional Cab 4-Wheel Drive |
| K |
Conventional Cab 4-Wheel Drive |
| G |
Van 2-Wheel Drive |
| 6 Truck Series or Cab Type |
| 1 |
1/2 Ton |
| 2 |
3/4 Ton |
| 3 |
1 Ton |
| 7 Body or Chassis Type |
| 1 |
Hi-Cube & Cutaway Van |
| 2 |
Forward Control |
| 3 |
4-Door Cab |
| 4 |
2-Door Cab |
| 5 |
Van |
| 6 |
Suburban |
| 7 |
Motor Home Chassis |
| 8 |
Utility (Blazer & Jimmy) |
| 9 |
Stake & Platform, Extended Cab |
| 8 Engine Code |
| B |
4.3L V6 TBI (LB4) |
| C |
6.2L V8 Diesel |
| D |
4.1L 6-Cylinder 2-Bbl. |
| E |
5.7L V8 2-Bbl. |
| F |
5.0L V8 4-Bbl. |
| H |
5.0L V8 4-Bbl./TBI |
| J |
6.2L V8 Diesel |
| K |
5.7L V8 4-Bbl./TBI |
| L |
5.7L V8 4-Bbl. |
| M |
5.7L V8 4-Bbl. |
| N |
4.3L V6 4-Bbl./TBI (1983-86) |
| N |
7.4L V8 TBI (1987-90) |
| P |
5.7L V8 2-Bbl. |
| T |
4.8L 6-Cylinder 1-Bbl. |
| W |
7.4L V8 4-Bbl. |
| Z |
4.3L V6 TBI |
| 9 Check Digit |
0 thru 9, or X |
| 10 Vehicle Model Year |
| L |
1990 |
| M |
1990 |
| 11 Assembly Plant Code |
| A |
Lakewood |
| B |
Baltimore |
| E |
Pontiac |
| F |
Flint |
| J |
Janesville |
| S |
St. Louis |
| V |
Pontiac |
| Z |
Ft. Wayne |
| O |
Pontiac |
| 1 |
Oshawa |
| 2 |
Moraine |
| 3 |
Detroit |
| 4 |
Scarborough |
| 5 |
London |
| 7 |
Lordstown |
| 8 |
Shreveport |
| 12-17 Serial Number |
Sequential Production Number |