Where is the thermostat located in a 2000 Saturn ls2?

SOURCE: Location of Fuel pump relay

more likely under hood in fuse relay cluster!usually around close to battery.

SOURCE: 2000 Saturn ls2 Coolant leaking into car on passenger side

Your heater core is in need of replacement.

SOURCE: 2000 Saturn ls2 Turn Signal

turn signal switch is broken. switch is easy to replace.

SOURCE: 2000 Saturn LS2 Code # po102 mass or volume

You just ruined the sensor...sorry :o(
This time its the dealer or mechanic ($80-200)
Good Luck

SOURCE: unlock 2000 ls2 saturn radio

well the only way to unlock the radio is this,,,there is a 4 digit code stored in the radio you need to get it from the radio,you must press and hold radio preset buttons 1 and 2 for 5 seconds and then a 4 digit code will appear,write down that code and respond to me so i can get you the unlock code,,only dealers can get the unlock code,i need to call saturn with that code thats in the radio to get you the unlock code,and then you enter the unlock code and you good to go,,,or you can take it to saturn and they may or may not do it for you for free,,but if you want just get back to me with the unlock code