4x4's & p/u's have the starter harness running in back of the motor(intake manifold) down by the heater case--U might have caught the wires under the heater case or Evaporator case.
The heater core has no gasket. If it is leaking, it must be replaced.
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 valve could be failing to open for one reason or another.
probably the blower motor resistor
how to replace a heater core in a 1997 Chevy blazer
how do i replace a heater core in a 2001 Chevrolet blazer
They did'NT make the Trailblazer in 2000 might you be looking for information for a 2000 Blazer.
when im stummed about my blazer i jus take it to an auto parts store an ask them where the part is im looking for or a chiltons book will work
It can be something as simple as that they are broken and needs to be replaced. Or the internal spring holding it could have worn out as well and also needs to be replaced.
It depends on what is broken on your water heater, as to how much it would cost to fix it. It might actually need to be replaced and be more cost effective to replace it.
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