How to Replace the Ignition Switch on a Chevrolet Blazer

Written by russell wood
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How to Replace the Ignition Switch on a Chevrolet Blazer
(Zedcor Wholly Owned/ Images)

The ignition switch on a Chevrolet Blazer begins the starting process by telling the starter to engage and turn over the engine. This switch gets turned thousands of times in its lifetime, which causes wear and tear on the switch itself. Eventually, the switch is going to fail and when it does, the Blazer won't be able to start. To fix the problem, you have to replace the Blazer's ignition switch, which should take about an hour or so to accomplish.

Skill level:

Things you need

  • Open-end wrench set
  • Phillips-head screwdriver
  • Replacement ignition switch

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  1. 1

    Open the bonnet. Remove the negative battery terminal connection from the battery, using an open-end wrench. Allow the Blazer to sit for 10 minutes, so the capacitor for the airbag system can dissipate.

  2. 2

    Take off the steering column trim using the Phillips-head screwdriver. Unplug the harness to the steering column using your hands. Remove the connectors on the turn signal and multi-function switch and lift them out of the way. Take out the key alarm connector by turning the connector 90 degrees clockwise, then pulling it out of the lock module assembly.

  3. 3

    Unplug the ignition switch by pushing down the tabs on the sides of the switch and then pulling it towards you. Push the replacement switch into the column to lock it in place. Push the key alarm connector into the lock module and twist it 90 degrees, then plug in the connector.

  4. 4

    Reinstall the turn signal and multi-function switch. Plug in the wiring for the switches and steering column, then reinstall the steering column cover using the Phillips-head screwdriver.

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