The heater core allows hot coolant to past through the ventilation system and also warm the air. Once one is clogged or damaged, the heater will certainly no much longer work. Learn how to change the heater core here.

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This article applies to the Chevrolet Silverado 1500 (1999-2006).

The heater core is as it sounds: the heart of the climate manage system in your Chevy Silverado. That is basically a mini radiator concealed deep within the engine compartment behind the dashboard, i m sorry produces warm for the climate system. The heater core has coolant lines which connect to it and produce the actual heat. A fan then pushes the heat through the ventilation system and also into the cabin. If a heater main point gets clogged or the blend door i do not care jammed, the unit will have to be removed. This job is no for the faint of heart and also requires the complete removal the the dashboard, including the radio, airbags, and also climate control system. However, this post can aid you in acquiring the task done and also prevent the hole in her pocket indigenous getting any bigger.

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Step 1 – eliminate the dashboard cover

The dashboard on your Chevy is set up piece through piece; the first part you will be remove is the top dashboard cover.

First points first, open up the hood climate disconnect the an adverse battery cable.Pry the waiting vents off of the dashboard.
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Figure 1. Remove the wait vents.Lift and also remove the side panels.
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Figure 2. Remove the next panel.Remove the two Phillips screws situated under the gotten rid of dashboard panels.
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Figure 3. Ease the dashboard screws.Remove the screws indigenous behind the wait vents.Push ~ above the relax tabs found on the peak side that the waiting vents and remove the manage assembly.
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Figure 4. Press down the release tab to eliminate the dashboard handle.Remove the "A" shaft panel and disconnect the tweeter wiring.
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Figure 5. Eliminate the "A" pillar trim.Grab the confront panel the the dashboard and begin to pry it in the direction of the cabin, then remove it.Loosen and remove all of the dashboard cover 7mm bolts.
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Figure 6. Pry off dashboard cover.
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Figure 7. Ease the 7mm bolts located throughout the dashboard.Disconnect every the wire plugs that attach to the dashboard.Gently background the dashboard sheathe up and disconnect the ambient light sensor.Remove the dashboard cover.
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Figure 8. Pop turn off the upper dashboard trim.
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Figure 9. Disconnect the ambient irradiate bulb.
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Figure 10. Remove the finish dashboard cover.

Step 2 – begin disassembling the dashboard components

Remove the 7mm vent register bolts.Remove the vent it is registered assembly.Remove the passenger next air bag switch.Loosen and also remove the steering column bolts.Then, remove the steering obelisk covers and also steering wheel.
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Figure 11. Ease the 7mm vent register bolts.
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Figure 12. Remove the passenger side airbag switch.
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figure 13. Remove the steering column.

Step 3 – end up removing the continuing to be dashboard components

Pull the rear cup holder the end as much as it goes.Lift the pocket of the facility console up.Locate the 4 mounting bolts and remove them.Remove the center console.Remove the antenna and radio.Remove the wire harness clips native the interior cabin.Remove the crucial panel cluster.Remove the parking brake release lever.

The passenger side airbag likewise needs to it is in removed.

First disable the SRS system.Then eliminate the upper and lower 10mm airbag mounting bolts.
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Figure 14. Remove the upper and also lower 10mm airbag mounting bolts.

Some vehicles are equipped through optional accessories including the OnStar security system; to express to figure 15 because that its removal.

Locate the interaction interface module and remove the 3 10mm mounting bolts.Remove the unit.
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Figure 15. Eliminate the OnStar communications module.
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Figure 16. The electric components, accessories and trim piece all removed.
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Figure 17. This picture shows the dash carrier removed.

Step 4 – empty the climate regulate system

Drain the coolant indigenous the system and evacuate the air air conditioning system.
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Figure 18. Drainpipe the coolant.

Step 5 – change the heater core

Unbolt the HVAC assembly.Remove the heater main point cover screws.Replace the heater core.Install the cover.Mount the assembly ago onto the truck.
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Figure 19. Unbolt the HVAC assembly.
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Figure 20. Replace the heater core.

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Step 6 – Re-install everything

Once the deed is done, take your time and also re-install every one of the dashboard components. Be wary the the screws and also bolts you usage to re-install the components, together some room slightly longer and also will no fit every the method in. After whatever is earlier together, height off the coolant and reconnect the negative battery cable.