Factors affecting the time:
* Mechanical Skill: A novice mechanic will likely take considerably longer than someone experienced with automotive repair.
* Access: The ease of accessing the heater motor varies depending on the specific S-10 model and any modifications. Some S-10s might require more disassembly of the dashboard or other components.
* Condition of the Truck: Rust, broken fasteners, or a previously botched repair can significantly increase the time needed.
* Availability of Tools: Having the right tools (sockets, wrenches, screwdrivers, possibly a ratchet) will speed up the process.
Conservative Estimate: Plan for at least 4 hours to allow for unforeseen complications.
It's always best to consult a repair manual specific to your year and model S-10 for detailed instructions and to get a better understanding of the complexity involved before starting the job.