Where is the thermostat in a GMC 1998 safari van?
The thermostat in a 1998 GMC Safari van is located inside the engine block. It's not easily accessible and requires removing some components to reach it. You'll likely need to consult a repair manual specific to your van's engine (e.g., a 4.3L V6 or a 5.7L V8 will have different locations even though they are in the same vehicle). The manual will show you exactly where it is and the proper steps for replacement.