R134a
R134a
134a
R134a
A 2005 model year vehicle would use R134a refrigerant.
R134a
R134aR134a
87 octane
R134a
R-134
The 2001 Tahoe does not use freon. It uses R-134a. If you have to ask and think it takes freon you should probably leave it to a professional. I'm assuming you will be using some sort of DIY kit. They include detailed instructions. Your best bet if going the DIY route is to buy a kit with a gauge to insure against overcharging your system. If that happens then surely you'll be visiting the shop.
The 2001 Chevrolet Tahoe runs on regular unleaded.