How to Replace a Factory TrailBlazer Radio

by Chris Moore

There's a chance that the factory radio installed in your Chevrolet TrailBlazer truck may not be the quality you want. It can be easy to replace that stock radio with an aftermarket stereo unit of your choice. Most stores that sell aftermarket car stereos will also install them for you, but it is possible to do it yourself. It's easier if you can find a unit that uses the same electrical connector as your model TrailBlazer.


Disconnect the truck's negative battery cable by loosening its cable clamp nut.


Remove all trim panels covering the radio unit; this can include a lower center insulator panel and an accessory trim plate. Remove any screws with a Phillips screwdriver and pry out the panels with a trim stick if needed.


Unscrew the mounting screws for the radio; these can require a Phillips screwdriver, Torx wrench or Allen wrench depending on the year. Pull the radio out of the instrument panel and disconnect the electrical connectors and antenna lead to remove it.


Install the new radio by connecting the electrical connectors and antenna lead and placing it within the instrument panel. If the unit came with its own mounting screws, use them to mount the radio in place.


Re-install all trim panels that were removed and reconnect the battery cable.


  • check The Powertrain Control Module will lose information stored in its memory when you disconnect the battery. To help it re-learn its procedures after reconnection, run the engine at idle speed until it reaches operating temperature, run it for two minutes at 1200 RPM, then drive the truck for about five miles under varied driving conditions.


  • close If the new radio uses its own electrical connector that is different from the TrailBlazer's, you'll need to connect the truck's wires to the new connector by either crimping or soldering. Each color wire must be connected to the same color at the other end.

Items you will need

About the Author

Chris Moore has been contributing to eHow since 2007 and is a member of the DFW Writers' Workshop. He received a Bachelor of Arts in journalism from the University of Texas-Arlington.

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