If your 03 Trailblazer produces heat at the back, the problem could be attributed to a faulty blower motor resistor block.
The heater blend door is not run by vacuum. It is run by an electric actuator.
how to replace a heater core in a 1997 Chevy blazer
how do i replace a heater core in a 2001 Chevrolet blazer
It does not use a cable. The heater blend door is operated by a electric motor. The complete dash assembly needs to be removed to gain access to the unit.
electric heater
Gas heater & electric heater both are available.
were is the heater relay on1996 jimmy?
Same as a 96 blazer go here.How_do_you_replace_the_blower_motor_on_a_1996_Chevy_blazer
form_title= Electric Hot Water Heater form_header= Install an electric hot water heater. Is your current water heater electric?*= () Yes () No How old is your home?*= _ [50] What is your current monthly electric bill?*= _ [50]
The main feature of an efficient electric heater is, that is used up to 30% less engery than a conventional electric heater. This reduces the cost of the heater.
The heater door control on a Blazer can be replaced by purchasing a new one. The heater vent will pop out with a little nudge from a flat tipped screw driver. Then insert the new heater vent door control.
The heater core is inside the heater unit on the passenger side under the dashboard