Why does your 1993 gmc suburban automaitc transmission shift hard?

A hard shifting issue in a 1993 GMC Suburban's automatic transmission can be caused by several factors, including low Transmission Fluid levels, dirty or worn transmission fluid, or a malfunctioning transmission control module. Additionally, worn or damaged internal components, such as the clutch packs or bands, can lead to harsh shifts. It's important to check the fluid level and condition first, and if the problem persists, a thorough inspection by a qualified mechanic may be necessary to diagnose and resolve the issue.