Never worked in a dealer, but at the gas station I do oil changes, tire rotations, batteries, timing belts, fan belts, radiator and heater hoses, intake manifolds (Ford 4.6s lol), fuel pumps, brakes, tires, transmission service (AT oil and filter change), clutches, engine swaps (my boss refuses to sell head gaskets, he's rather just swap i na junkyard engine), tune ups (plugs wires cap rotor), electrical trouble shooting, MIL troubleshooting (EVAP problems get sent down the road because we don't have a smoke machine and FL doesn't have state inspection anyway), diagnosing no-starts, AC compressors (they'll probably want you to get special training for this, I learned OTJ at the gas station), radiators, especially on Toyotas because ALL of those plastic radiator tanks leak eventually.
On any given week those are the jobs I basically do. Lots of other stuff I can't think of right now
They'll probably put you on as a lube tech first, where you will change the oil, rotate the tires if necessary (when the rear has more tread depth than the front), visually inspect the disc brake pads and clean and adjust rear drum brakes (many cars, even toyotas still have rear drums), test the battery, and replace if you get a go-ahead (which often means cleaning the throttle body on Toyotas, which are known not to start or idle lousy after the computer resets), check and replace the air filter if necessare, check tire pressures, etc.
