1. Open the driver's side door.
2. Locate the VIN (Vehicle Identification Number) plate. It is usually located on the driver's side door pillar, just below the window.
3. The chassis number is the 17-digit code stamped on the VIN plate. It begins with the letter "J" followed by 16 digits.
Here is an example of a chassis number for a 1996 Isuzu Trooper:
```
JTFD28W60T0000001
```
The first digit, "J", indicates that the vehicle was manufactured in Japan. The second digit, "T", indicates that it is a Trooper. The third digit, "F", indicates that it is a four-wheel drive model. The fourth digit, "D", indicates that it is a 1996 model. The fifth digit, "2", indicates that it is a two-door model. The sixth digit, "8", indicates that it has a V8 engine. The seventh digit, "W", indicates that it has a white exterior. The eighth digit, "6", indicates that it has a gray interior. The ninth digit, "0", indicates that it has a manual transmission. The tenth digit, "T", indicates that it has a tilt steering wheel. The eleventh digit, "0", indicates that it has power windows. The twelfth digit, "0", indicates that it has power locks. The thirteenth digit, "0", indicates that it has air conditioning. The fourteenth digit, "0", indicates that it has a CD player. The fifteenth digit, "0", indicates that it has a sunroof. The sixteenth digit, "1", indicates that it is the first vehicle produced in the 1996 model year.
