What does infl rest mean on a 1993 Chevrolet Caprice?

"INFL REST" on a 1993 Chevrolet Caprice's instrument cluster means Inflation Reset. This refers to the system that monitors tire pressure. When the "INFL REST" light illuminates, it indicates that the tire pressure monitoring system (if equipped – not all Caprices had this feature in 1993) needs to be reset. This is usually done after inflating tires or changing a tire. The exact procedure for resetting varies slightly depending on the specific system (some might require a button press, others might reset automatically after driving a certain distance). Consult your owner's manual for the precise instructions. If your Caprice doesn't have a dedicated tire pressure monitoring system, the light might be indicating a general problem and should be investigated.