To retrieve trouble codes on a 1997 Chevy 1500, you'll need to use one of these methods:
* OBD-II Scanner: The most reliable method is using an OBD-II scanner. This plugs into the OBD-II port (usually located under the dashboard) and reads the codes directly from the vehicle's computer.
* Check Engine Light Flash Codes (Less Reliable): Some older vehicles, even some from 1997, might use a method of flashing the check engine light to indicate codes. However, this is less reliable and the pattern varies between makes and models. It's unlikely to work consistently on a 1997 Chevy 1500. A manual should specify if this method is applicable.
Therefore, you'll need an OBD-II scanner for the most accurate and reliable results.