changing thermostat \ throttle body on 99 Monte Carlo with 3.1 engine

I saw no detailed description on how to change a Thermostat on a 1999 Monte Carlo with a 3.1 engine. I finally figured out how to do it. Here are the instructions

THERMOSTAT REPLACEMENT

TOOLS:

Pliers =96 to remove hose clamps

13 mm socket 13 mm open end \ box end wrench Slotted Screw driver =96 to remove screw hose clamps

1) Remove Air Cleaner canister assembly

2) Remove flexi rubber hose going to the Throttle body =96 disconnect the two wire cable assemblies from the flexi rubber hose, and the black plastic breather tube that goes to the back of the engine=85=85..move the cable assy. And black plastic breather tube out of the way. 3) Disconnect throttle cables from throttle body. a. Outside cable clips onto throttle body housing, very carefully push cable end off of post b. Either have someone press down on the gas pedal, or twist the throttle body spring assembly to get some slack in the cable. Pull the cable up and out of the groove that it is in. 4) Remove the throttle cable bracket assembly from the top of the throttle body housing. There are two 10mm bolts. 5) Remove the throttle body. a. Disconnect the wiring cables going to the Throttle body b. Disconnect the two hoses from the coolant bypass assy. c. There are two bolts holding the throttle body in place. i. The upper bold is a 13 mm head, remove it. ii. The bottom bolt has a threaded end with a 13 mm nut attached. This nut holds the coolant bypass assy. Remove the nut. Once removed, VERY CAREFULLY pull the coolant bypass assembly toward the fender=85=85..it=92s only going to move about .5 inches=85..just enough for you to get a 13mm open end wrench on the hex head in the middle of the bolt. Remove this bolt=85=85=85.you=92re only going to be able to move it about a quarter turn=85=85.be patient. You can continue to do a quarter turn to remove the bolt, or, once the bolt is loose, VERY CAREFULLY attach a needle nose vise grips to the threaded end of the bolt and turn it out the rest of the way=85=85..BE CAREFULL, the bolt has to be absolutely loose, or you=92ll strip the threaded end.

d. Very carefully pry the Throttle Body assembly away from the engine. Set it aside, since it=92s off the engine you should clean all the carbon off of it. Also, you should replace the Throttle Body Gasket.

6) Now that the Throttle Body Assembly is removed, you=92ll have better access to the Thermostat housing 7) Remove the radiator Hose from the Thermostat housing pipe. Put a catch basin under the car because you=92re going to loose coolant. 8) The Thermostat housing is attached to the engine with two 13 mm head bolts. The lower Thermostat Housing bolt hole is actually slotted, for easier removal. 9) Remove the upper Thermostat Housing Bolt 10) Now the fun starts, using a Box end 13 mm wrench loosen the lower bolt. Note that you should have a magnetic pickup tool because you=92re going to drop the wrench many times during this process. 11) It took me over an hour to finally position the wrench and get enough leverage to loosen the bolt=85=85=85=85keep trying, it does finally come off. Remove the bolt. It'll take you a while, I could only do a quarter turn at a time. 12) Carefully remove the thermostat housing \ thermostat 13) Clean surface of thermostat housing and replace with a new one. 14) Assemble and you=92re done.

This project took me 4 hours. Good luck