The window for the driver side doesn't go down and up, What should I do? on 1999 Buick Century

Last time it worked for 2 days and no more. Also the fuel gauge doesn't read the reel fuel level. sometimes I fill up the tank but it read empty or sometimes the opposite, I may get a little oil but it read full. What should I change to fix it? Thank you!

Asked by for the 1999 Buick Century
ck pwr to window switch and window motor if there is pwr repl window motor