How to flush heater core on 2001 chevy tahoe?

Evan Jenson

• 122 Answers
• Posted on Oct 21, 2008

SOURCE: 2001 Chevy s10 with no heat

If you are certain there is no air in the coolant system, then there is a chance that the blend door motor is not working or the heater control assembly is bad. since you have replaced your own heater core you probably noticed the the doors inside the heater core housing. One of those doors is controlled by the "hot/cold" knob. The motor on that door could bad.

autodr

• 260 Answers
• Posted on Nov 16, 2008

SOURCE: driver side power seat 2001 Chevy Tahoe

as long as nothing is stuck in track and you hear no noise when using switches, look for broken wire at connector or in harness. ck fuse first of course, if blown, something may be stuck in track causing it to stop and blowing fuse

SOURCE: 2001 Chevy Tahoe with ABS & Brake light on.

I hope you have the problem fixed by now, but, it is the ABS control under the truck. You need to go under the hood and open the fuse box and disconnect the 60 amp fuse for the ABS, this will turn it off before it burns up. This however will also cause the traction assist off light to stay lit all the time. To the fix the problem you can pay tons of money ($700 or so) to have the dealership install a ABS control and the problem will happen again over time. Or, remove it yourself, go on ebay and ship it off to a guy who repairs them for about $150 and you will never have the problem again. Also, if you wrap your cable ends with plastic and protect them good, you can still drive you truck while the part is being worked on. It takes about a week.

Harvey N Tawatao

• 3854 Answers
• Posted on Dec 26, 2009

SOURCE: how to change a heater core in a 2001 chevy blazer

Sorry, your going to have to remove the dash.

• Remove the front dash panel by turning the lower screws in a counter-clockwise direction, then unscrewing the single bolt on the lip of the instrument cluster and pulling the panel out. Remove the rear wiper switch and the 4x4 switches, if applicable. Lowering the tilt wheel will allow the panel to be totally removed.
• Remove the radio, headlight switch module and glove box by turning their screws in a counter-clockwise direction.
• Remove the main dashboard by unbolting it at the front, between the windshield and firewall. There are six to eight bolts holding it in, and, once they are removed, the dash can be pulled away from the firewall. Be careful not to pull too much, as the wiring harness could become damaged.
• Drain the coolant system by turning the drain plug on the lower left corner of the radiator and allowing the fluid to fall into the drain pan. Uncapping the radiator can reduce the internal pressure.
• Remove the heater core hose, on the upper left of the engine bay by pinching their hose clamps with a pair of pliers and pulling them off. Some models will have screw-type hose clamps; turning them counter-clockwise will loosen them. Age and heat may have stuck the hoses to the core nipples, and the hoses can be cut right at these nipples if necessary. Leave enough hose to reconnect the new core.
• Unbolt the heater core's mounts with a socket wrench in a counter-clockwise direction. Once the bolts are free, the heater core can be maneuvered toward the windshield and slid out. Some coolant may splash out, so have a towel handy.
• Replace the heater core with a new one by sliding it into place and securing the mounting bolts.
• Reconnect the heater core's hoses, turn the radiator's drain plug clockwise to close it, then refill the coolant system with a 50/50 percent mix of coolant and water.
• Reconnect the dashboard to the firewall, then replace the front dash panel and fasten its instrument cluster screw and bottom bolts.
• Crank up the Jimmy and add coolant until the heater core is filled and blowing hot air.
• Replace the radiator cap.

SOURCE: do i need to pull my dash to replace my heater

You will need to pull the dash and a bunch of other components in order to access the heater core. Getting ready to do the same repair and really not looking forward to it.