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1998 Chevy Blazer heater core installation - 1998 Chevrolet Blazer

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  • Chevrolet Master
  • 1,209 Answers

Your job will be a long one, but not the worst one out there by far. You will need to unhook the battery, remove all of the lower trim from the driver and passenger sides under the dash. Remove the nuts that hold the steering column to the bottom of the dash and let is rest on the drivers seat. Remove the kick panel trim from both the drivers and passenger side foot well. There are 2 bolts on each the drivers and passenger side that hold the sides of the dash board to the vehicle, then there are I believe 6 bolts along the front edge of the dash along the windshield that need to be removed. This should let the dash be tilted back away from the windshield and rest atop the steering column. There will be an access door in the top of the heater box that will allow removal and replacement of the new heater core. You will still need to unhook the hoses under the hood, and you might need to unplug, or remove some ground wires hear and there, just make sure you take note of what you have to unplug or remove and make sure you put everything back like it was before you started.

Posted on Apr 21, 2013

6 Suggested Answers

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Posted on Jan 02, 2017

  • 4 Answers

SOURCE: how to remove heater core on 97 chevy blazer

drop column, pull back dash. there is a cover that comes off and exposes the core

Posted on Apr 06, 2009

boscia
  • 163 Answers

SOURCE: replace a heater core in 2000 chevy blazer

it is located under the dashboard against the firewall of the passenger seat. i recomend buying a repair manual from your local auto parts store before attempting as it requires draining, flushing, refilling and bleeding the cooling system as well as removing many other componets like the entire dashboard and thermostat

Posted on Dec 01, 2008

  • 713 Answers

SOURCE: how to replace heater core on my 1998 chevy blazer

pretty easy to do. go to passenger side of dash and remove glove box for working room. there is a lower panel below the dash that needs to be removed. disconnect the heater hoses under hood. once panel under dash is removed you will see the heater box remove the 6-8 bolts around the very base of it, it will able to be lowered down and you will see the heater core it has a couple of brackets that hold it in place remove these. put new one in its place and put back together.

Posted on Aug 26, 2009

andreousb
  • 4 Answers

SOURCE: 1994 CHEVY BLAZER W/AC S10 HEATER CORE

The link below helped with mine and has pictures as well. Good luck!
http://www.sytyarchives.com/howto/viewarticle.php?article_name=heater_core.php&dir=climate_controls

Posted on Oct 07, 2009

Molson02536
  • 3854 Answers

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.
Good luck and make sure you have lots of time and use the camera on your cell phone and take pictures to use as reference.

Posted on Dec 26, 2009

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