#Sierra gmc gmc truck wiring diagrams how to#
#Sierra gmc gmc truck wiring diagrams upgrade#

Once all the wiring is done, it is time to test the new head unit.

Make sure to plug in all the necessary wires and tie any unused wires securely so that they don’t rattle around making irritating noise. In addition to the power and speakers, you might also have additional clips for antenna, USB port, reversing camera, any lighting etc. But if the old wiring comes with clips, you can easily plug them into the new head unit.

If your old stereo doesn’t have any clips, you might have to purchase a harness adapter to plug in wires into the new stereo / head unit. The following table and image show the car stereo wire color guide.ġ2V Accessory Power (Key in Ignition Position)ġ2V Constant Power to Keep Memory Alive (Independent of Key Position)

#Sierra gmc gmc truck wiring diagrams how to#

Car Stereo Wiring Diagram / Wire Color Guideīefore looking how to install a new car stereo, let us quickly take a look at a typical car stereo wiring diagram or the Wire color guide. Disconnect all the wiring from the head unit to completely remove the old stereo. Once you remove the head unit, you will have access to the rear wiring. Remove those bolts using a screwdriver (Phillips or Flat Head, depending on the type of bolts) and you can easily detach the head unit. So, if you have already taken out the plastic trim cover, you will have access to the bolts holding the head unit in place. You have to use a special tool to remove spring clip mounted head unit.

Spring clip mounted head units usually don’t have a plastic trim cover. Now, depending on the model, the head unit in your car will be mounted either using spring clips or bolts. You will now have access to the head unit. Remove the plastic trim using a spudger, preferably a plastic one so that you don’t damage the trim. In most cars, the head unit is covered with a plastic trim, which also might cover the central two AC vents. Once we disconnect the battery, we are now ready to remove the old stereo. Make sure that the negative cable from the battery is properly tucked away from the negative terminal of the battery so that it doesn’t make any accidental contact. You can leave the positive terminal as it is. You don’t have to completely disconnect or remove the battery from its position but just loosen the negative terminal and disconnect it by removing the terminal. Usually, car’s battery is located under the hood, in the engine bay. The first and important step while removing the existing stereo is to disconnect the battery. Next, we are ready to remove the old stereo from our car.

You will also get a Car Stereo Wiring Diagram either printed on the stereo itself or on a separate paper. Most new car stereos come with all the necessary wires, adapters and accessories. If you are lucky and you have access to a demo, then it will definitely help you in making a purchase. Some store owners tend to have a sample setup for testing stereos, speakers and subwoofers. Shortlist a couple of them and if possible, try to get a demo from a store. There are several brands such as Sony, Kenwood, Pioneer, JBL, Apline, JCV and many more.

#Sierra gmc gmc truck wiring diagrams upgrade#

If you are planning to upgrade your car stereo, then spend some time visiting car accessory stores and also do some research online.

Car Stereo Wiring Diagram / Wire Color Guide.