The air filter is in the air box on top of the engine. Disconnect the air intake from the fender, then the wiring to the sensors. The box can now be removed and the filter changed.
97 chev cav fuel filter is located in under rear passenger side right by the wheel axle.
22L (liters) is 5.81 US gallons.
lr stands for long rifle(uses a bullet) I dont know where you got 22l from
The thermostat is on the water pump.(the left side in the front of the car) 2 screws to take out that's all
the t.p.s is right across from the throttle cable on the throttle body the when u find it u will see how to take it off
turn the bulb clockwise until it pops out unclip it put in new one and twist it back in tadaaaaa!
Impossible to answer without more information
50-200 usd
10-1000 USD depending on specifics.
No published sn data.
20-50 or so
Ther is no egr valve on the 2.2 turbo engines. With FI and turbo, there was no need. Some of the earlier carb engines did have egr.