I know on some cars and trucks you can do a sequence of steps to make the check engine light blink and display a code which can be matched on a chart. Does any one know know how to get a 97 T100 to display a code and do you know where a corresponding chart of issues is?

Thanks, my check engine light popped on while towing, never done that before. Seems to run fine, but I hear a slight ticking at idle.

Thanks.