Where Is The Heater Core In A 95 Blazer

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Mute the speaker Listen to this using a male or female voice M/F 

By Robert Bayly

The 1995 Chevrolet Blazer shares a platform with the GMC Jimmy, Chevrolet S-10 and GMC Sonoma pickups. It was equipped with either a 2.2-liter in-line-four cylinder or a 4.3-liter V-6 engine. The heater core in the Blazer works in a manner similar to the engine's radiator. When the heater is turned on, engine coolant flows through the heater core....

Removal 1

Mute the speaker Listen to this using a male or female voice M/F Park the Blazer on a level surface and set the parking brake.

2

Mute the speaker Listen to this using a male or female voice M/F Allow the engine to cool. Disconnect the negative battery cable. Disengage the lockout function if the Blazer has a Delco Loc II stereo system. Slide a drain pan under the passenger side of the radiator. Loosen the drain plug and catch the coolant in the drain pan. Replace the drain plug. If the coolant is still clean, you can reuse it.

3

Mute the speaker Listen to this using a male or female voice M/F Loosen the heater hoses at the firewall with a flat-head screwdriver. Wrap a piece of masking tape around each hose and label it with a marker so you can put them back in the same position. Remove the hoses.

4

Mute the speaker Listen to this using a male or female voice M/F Move to the passenger compartment. Remove the left and right lower dash panels, which are held on with two screws and two clips. Remove the screws with a Phillips screwdriver. Use the Phillips screwdriver to remove the two screws from the instrument panel bezel. The screws are just above the instrument panel. Remove the bezel.

5

Mute the speaker Listen to this using a male or female voice M/F Remove the four screws that hold the instrument panel to the dash with a ratchet and socket. They are screws but have hex heads. Disconnect the electrical connectors and remove the panel. Remove the four screws that hold the radio in the dash with the ratchet and socket. Disconnect the antenna lead and wiring harness and remove the radio.

6

Mute the speaker Listen to this using a male or female voice M/F Look at each lower corner of the dash. You'll see a silver bracket at each corner. Remove the bolt running through it with a ratchet and socket. Remove the two Torx screws just above it with a ratchet and Torx bit. The brackets will allow you to tilt the dash away from the windshield, but not yet.

7

Mute the speaker Listen to this using a male or female voice M/F Remove the four nuts that attach the steering column to the firewall and dash with a ratchet and socket. Lower the steering column onto the seat. Move to the first vent on the passenger side of the dash. Look just below and to the left of the vent. You will see a bolt attached to a thin wire bracket. Remove the bolt with a ratchet and socket.

8

Mute the speaker Listen to this using a male or female voice M/F Move to the top of the dash and pry up the speaker and vent covers with a small flat-head screwdriver. Remove the screws -- also hex head -- with a ratchet and socket. Disconnect and remove the speakers. The dash will now pivot toward the rear of the Blazer.

9

Mute the speaker Listen to this using a male or female voice M/F At the right rear of the dash, disconnect the electrical connector. Lift the dash off its brackets and remove it.

10

Mute the speaker Listen to this using a male or female voice M/F Remove the bolts from the wire brace at the heater core cover and cowl with a ratchet and socket. It is held on with two bolts, one on the cover and one on the cowl. Remove the brace. Remove the six bolts from the heater core cover with a ratchet and socket. Remove the cover. You will see the heater core. It looks like a small radiator.

11

Mute the speaker Listen to this using a male or female voice M/F Remove the bolt from each corner of the heater core with a ratchet and socket. Where the metal heater core lines enter the firewall, there is a clamp; remove the screw with a Phillips screwdriver. Pull the core straight back and remove it

Installation 12

Mute the speaker Listen to this using a male or female voice M/F Slide the new core into place. Install the four bolts and clamp and screw. Install the cover and bolts with the socket and ratchet. Install the wire clamp and bolts.

13

Mute the speaker Listen to this using a male or female voice M/F Mount the dash on its brackets. Reconnect the electrical connector. Pivot the dash back into place and install the speakers and the screws along the top. Use a torque wrench to torque the screws to 17 inch-pounds, not foot-pounds. You will need a small inch-pound torque wrench for this. Install the vent and speaker grilles. Install the bracket bolts and Torx screws.

14

Mute the speaker Listen to this using a male or female voice M/F Install the radio and plug in the antenna and harness. Install the instrument panel and plug in the electrical connectors. Torque the instrument panel screws to 66 inch-pounds. Lift up the steering column and attach it to the firewall and dash with the four nuts. Install the bezel and its two screws. Install the lower dash panels.

15

Mute the speaker Listen to this using a male or female voice M/F Connect the heater hoses in the engine compartment. Fill the radiator with coolant. Reconnect the negative battery cable. Start the engine and check for leaks.

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