Left turn signal doesn’t work in the back & blinks fast in the front & the right turn signal cuts in & out, gas gauge doesn’t work. It drives great, just don’t know how to fix the problems. It has a brand new battery, brand new brakes (just needs put on) & has headlight cleaner cause even with driving with brights on at night I can still barely see

 

Looks like it is in good condition and you got it at a good price. Check your left rear turn signal bulb. It is either bad or bad socket or wiring. The right turn signal is also a problem with the wiring. When you say that the fuel gauge doesn't work, is it erratic or nothing at all? If it is erratic then it is probably the stepper motor in the gauge. If it doesn't work at all it is likely a problem with the sending unit in the fuel pump.

 

I changed the bulb but that wasn’t it. About the gas gauge, when it 1st starts up it goes to full but after driving it for a few minutes it shoots down to e & stays there & every now & then it will kinda float up a little

 

Check the socket for the bulb and the wiring to the socket as well. It still could be either the stepper motor or the fuel sending unit. In the years that your van was built, GM had trouble with the stepper motors going bad.

 

I don’t know exactly what to look for lol I’m not car smart & I swear everyone should be! How do I know if a fuse is bad too?

 

Take each fuse out and check it for continuity with a meter. A visual inspection is not good enough.

 

Okay I don’t have a meter

 

There are some real cheap meters for sale that are good enough to test fuses. If you want to do some basic repairs on your car, you will need to invest on some basic tools.