The drain comes through the firewall on the passenger side. Easy to spot. Push a stiff wire up and clear out debris. If it is not plugged and you are wondering about the skanky smell from the air ducts then you have to spray a cleaner in the passenger side air duct.
Drain on a/c unit is clogged.
The drain for the condenser may be clogged.
Unplug clogged evaporator drain plug.
In a 2002 trailblazer it is located on the bottom of the radiator one the passenger side. Every other model year to my knowlege does not have drain plug.
The transmission fluid on a Chevy Trailblazer is changed by placing a drain pan under the vehicle, removing the drain plug, and allowing it to empty. The drain plug is then re-installed and fluid added through the filler tube until full.
You have to take the lower rad hose off. They stopped putting the drain valve on the systems after 2002. Try www.trailvoy.com for all the answers for your Trailblazer!
Should be on the rear or side of the oil pan
Probably not, depends on where the clog is at and how the dishwasher drain is connected. I wouldn't chance it, but the worst that will happen is the sink will fill with the water from the dishwasher.
A clogged AC drain can cause water leakage.
The condensation drain is located under the vehicle at the bottom of the a/c box on the firewall. there is an "udder" there that is the drain. usually becomes clogged with leaves and such after winter. squish the udder and it will drain (wear a raincoat)
Either snake it or chemical drain cleaner.
Water won't drain from shower. Either trap or shower drain line is clogged.