When I step on the clutch, I hear a loud squeaking sound,(like a door opening). Does anyone know what may be causing this. Pressure plate maybe?

 

Throw out bearing. To replace you have to pull the transmission. When you do replace, do NOT use anything other than Toyota parts, or else it will chirp even more. Also, you might want to take a small spray can of lithium grease and lube up the pedal. The clutch is hydraulic, so there are no cables.

 

Camshaft is, as usual, on the money.

Prior to the GS, my whip was a 93 SC 5 spd (and that's precisely what I had to do for that problem).