Where is the transmission drain plug for 2004 trailblazer

Dexron Vl

Walmart has it under its "SUPER TECH" line of products. $4.27 per quart.

unscrew transmission pan bolts . there is no drain plug. With care remove oil pan
hope it helps

After using your A/C and you shut vehicle off in your garage or drive way see if it leaks water on the floor or ground. If it doesn't your evaporator drain is plugged. Not uncommon to see this.

does not have drain plug, on this car you have to remove the oil pane if you want to change or servicing

There is no radiator drain plug on these trucks, you have to remove the lower radiator hose to drain coolant.

I take it that it is an automatic transmission, if it is draining that much fluid a month and you can't find any outside leaks it could mean there is an internal leak somewhere. If you see a pink milkshake color in your coolant then it could be the radiator transmission cooler which I believe wont cause an outside leak so you can start from there. It is located and is part of the radiator. Just follow the transmission cooler line and it will lead you the possible problem.

If you are using the A/C then it might be ok but if its the coolant then you need to get down there and see what is leaking and from where.

yes it will be on bottom of box going out firewall

The oil drain plug is the one closest to the radiator, on the larger of the 2 metal pans. The oil drain plug is directly under the engine.

The transmission drain plug is on the smaller/thinner metal pan, it is directly under the transmission.

transmission pan must be removed to drain fluid & change filter.loosen all pan bolts,remove all but 4 bolts @ corners.strike pan with a plastic hammer or block of wood if it's stuck. slowly remove remaining bolts,allowing fluid to drain into a suitable container.this can get messy,have rags handy.when drained,remove pan,clean pan & transmission gasket surfaces.pull filter straight down,push new filter on to tube,positioned as original,install new gasket,'run down 'all pan bolts then tighten them securely.