Common questions

Is there a stereo wiring diagram for a GMC Sierra?

Is there a stereo wiring diagram for a GMC Sierra?

We’ll cap our Sierra stereo wiring diagram off with the third and last generation of GMC truck. Because the latest Sierra includes a wide range of infotainment features, you may need additional parts when upgrading this generation of GMC Sierra.

What is the trigger wire on a Sierra stereo?

As you notice the speaker wires remain largely unchanged. However there is a change to the Sierra stereo wiring diagram when it comes to the Sierra antenna trigger wire. This trigger wire is pink in the C1500 series of Sierra, and you’ll need this if you are retaining the power antenna.

Where is the constant wire on a GMC stereo?

Locate the +12 volt constant wire first. Label it or splice to constant wire on aftermarket stereo first. Swapping yellow wires will cause damage to any aftermarket stereo. Check fuses if your unable to find +12 volts. Note the location of the connector “Keys” in yellow. All wire diagrams are not 100% accurate.

Can you swap yellow wires on a stereo?

Swapping yellow wires will cause damage to any aftermarket stereo. Check fuses if your unable to find +12 volts. IMPORTANT – There are two (2) yellow*, two (2) gray and two (2) brown wires in this harness.

We’ll cap our Sierra stereo wiring diagram off with the third and last generation of GMC truck. Because the latest Sierra includes a wide range of infotainment features, you may need additional parts when upgrading this generation of GMC Sierra.

Locate the +12 volt constant wire first. Label it or splice to constant wire on aftermarket stereo first. Swapping yellow wires will cause damage to any aftermarket stereo. Check fuses if your unable to find +12 volts. Note the location of the connector “Keys” in yellow. All wire diagrams are not 100% accurate.

As you notice the speaker wires remain largely unchanged. However there is a change to the Sierra stereo wiring diagram when it comes to the Sierra antenna trigger wire. This trigger wire is pink in the C1500 series of Sierra, and you’ll need this if you are retaining the power antenna.

Swapping yellow wires will cause damage to any aftermarket stereo. Check fuses if your unable to find +12 volts. IMPORTANT – There are two (2) yellow*, two (2) gray and two (2) brown wires in this harness.

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Ruth Doyle