Where are the engine diagnostic codes located on a 1994 caprice?

A 1994 Chevrolet Caprice doesn't have engine diagnostic codes displayed in a readily accessible location like a screen. Instead, you need to retrieve them using a scan tool or by performing a "check engine light blink code" procedure.

There is no sticker or physical display of codes.

To get the codes, you have two options:

1. Use an OBD-I scan tool: A 1994 Caprice uses the OBD-I diagnostic system. You'll need a scan tool specifically designed for OBD-I (sometimes called ALDL - Assembly Line Data Link) to read the trouble codes. These tools are relatively inexpensive and can be found online or at auto parts stores. You'll connect this tool to the ALDL connector (usually located under the dash, often near the steering column).

2. Check Engine Light Blink Code Method (less reliable): This method involves jumping a wire in the ALDL connector to trigger the check engine light to flash a series of codes. This is less reliable and more difficult than using a scanner, and the interpretation of flashes can be challenging. Instructions for this method can be found online by searching "1994 Caprice check engine light blink codes," but proceed with caution as incorrectly performing this can potentially damage your vehicle's systems. A scan tool is highly recommended.