The thermostat on a 1998 Chevy Venture is located on the engine,
at the rear of the engine, near the firewall, on the passenger side. It's usually housed in a plastic housing. Access will require removing some components to get a clear view and reach. You'll likely need a wrench and possibly some pliers to remove the housing and replace the thermostat.
It's crucial to consult a repair manual specific to your 1998 Chevy Venture's engine (3.1L or 3.4L V6) before attempting this repair. Pictures in a repair manual will greatly assist in pinpointing the exact location and guiding you through the process. Improper replacement can lead to overheating.
