The resistor for the fan speed on a 1999 Chevy S10 is typically located
behind the glove box. However, it's not always in the same exact spot, and some variations exist depending on trim level and specific build. You might need to partially remove the glove box to access it.
Before you start removing anything, it's always a good idea to consult a repair manual specific to your 1999 Chevy S10. This will give you diagrams and precise locations to avoid unnecessary disassembly.
