How do I change antifreeze on 04 chev. colorado. I did not see a drain plug in the engine block so I cant drain the engine. thank you

There r freeze plugs. But disconnect bottom hose on engine n let drain..utube can show u bettr

disconnected near tank

Saleem, if you bought one all ready it should have some simple directions included, drain antifreeze ,you will need to remove a freeze plug that is in between cylinders , pick on that is eazy to get to, you want it to be some what centered in motor , use care when removing plug of your choice ,not to push it into block ,once out clean hole and test fit heater , most will not recommend using sealants the rubber will seal it by tightening small nut that will expand rubber on end to seal it .refill and test, DONT TEST WITH OUT COIL BEING IN ANTIFREEZE OR WATER.AND MAKE SURE WHEN YOU PLUG IT IN WALL SOCKET IT CAN HANDLE WATTAGE.
Woody

Drain the fluid by the drain plug at the bottom of the radiator while engine is cold open up the radiator cap close plug after empty and fill till full start engine find bleeder at back block or on front or on the top hose open slightly keep filling till fluid comes out of bleeder with out air

O2 SENSORS LOCATED ON THE EXHAUST MANIFOLD AND ONE EXHAUST PIPE BEFORE CATALYTIC CONVERTER.RADIO NOT SHUTTING OFF PROBLEM IN THE BCM.THE WIPERS WONT SHUT OFF.PROBLEM IN THE WIPER MOTOR OR SWITCH.IF SEAT BELT LIGHT STAYS ON YOU HAVE A ELECTRICAL PROBLEM THIS WOULD BE A DEALERSHIP FIX.

find where top hose comes from the radiator into the engine block, then drain some of the coolant out and remove hose and thermostat from the block. remember which way the termostat sits in the block and install new one. its always a good idea to flush your cooling system before putting in a new thermostat. if the old one was plugged up, the gunk thats in your system will just plug up the new one in time too. you can get a bottle of radiator flush from most auto parts stores.

You'll have to drain it from the radiator or taking off the bottom radiator hose.

GM has a sealing tab, helpful in similar situations. Inquire at the dealership parts counter. Hope this helps

There is a 3/8" square head plug above the starter. This drains the left bank of the block and can be replaced with a 1/4" pipe valve.

well you dont actully have to drain the the block its self. There should be a drain on the radiator on either the right or left bottom side of the radiator.