Oldsmobile/Buick Repair: 94 Olds Cutlass Ciera 6 cyl 301L, olds cutlass ciera, olds cutlass

Question
Heat is temperamental.  At highest settings car takes 45 minutes to get warm and suddenly has no heat.  Is is my thermostat?  Is it simple enough for me to change?

Answer
HI CAROLYN AND TY FOR WRITEING.YES MOSTLIKELY YOUR T STAT IS BAD.MOST CARS ARE SIMPLE THIS ENGINE IS A LITTLE MORE COMPLEX .IF YOU FOLLOW YOUR UPPER RADIATOR FROM THE RADIATOR TO THE ENGINE.YOU WILL SE A PART ON THE END ,THIS IS COMMONLY CALLED A GOOSE NECK OR T STAT HOUSING.THERE IS TWO BOLTS HOLDING IT ON .UNDER THIS YOU WILL FIND THE T STAT.BE SURE AND PAY CLOSE ATTENTION TO THE WAY YOU TAKE IT OUT AS TO PUT IT BACK EXACTLY THE SAME POSITION.OR JUST REMEMBER THE SPRING GOES TOWARD THE ENGINE..ONLY ATTEMPT THIS WHEN THE CAR HAS SAT OVER NITE BECAUSE IT WILL BURN YOU IF NOT COLD..ANTIFREEZE WILL RUN OUT OF THIS HOSE BUT NOT A LOT .BUT YOU SHOULD HAVE A PAN UNDER IT TO CATCH IT.NOT SIMPLE BUT YOU SEEM VERY INTELLAGENT, SO IT WILL PROB COME DOWN TO IS IT SOMETHING YOU WANT TO TRY..GOOD LUCK PLEASE TAKE TIME TO RATE MY HELP TY BILLYMAC