How do you hook up a battery in a Silverado?

Step 1. Start by installing the battery isolator. Battery Isolator (GM P/N 12135194). GM calls this a “secondary auxiliary relay”. It goes on the firewall, up and left from the brake booster. How you mount it is up to you. If your truck is like mine, then it doesn’t have the needed studs from the factory.

What should I do if my Chevy Silverado battery is draining?

You’ll want to take a look at your Silverado’s battery posts where they bolt to the battery. If there is a lot of corrosion here, you’re going to want to clean that off with a wire brush. There are also specific battery post cleaners that you can buy. They are usually less than 10 bucks at the local parts store or Wal-Mart.

How is battery grounded on Chevy Silverado Sierra?

The battery is then grounded to the driver side head via a M10x1.5 bolt. I also ran a ground from the second battery to the frame. Here you can see my two 1/0 grounds running from the battery (bottom of pic) to the head and to the frame.

Where is the battery isolator on a Chevy Silverado?

Battery Isolator (GM P/N 12135194). GM calls this a “secondary auxiliary relay”. It goes on the firewall, up and left from the brake booster. How you mount it is up to you. If your truck is like mine, then it doesn’t have the needed studs from the factory.

How many volts does Chevy Silverado alternator need?

With the engine just fired up, you should get over 14.2 volts. If you got 14.2 or more volts, the alternator is charging fine. If it’s still showing in the 12’s, it’s time to replace the alternator.

How do you set the voltmeter on a Silverado?

Set it to read voltage. Specifically, you’ll need to set it to 20V DC. With your Silverado turned off, you’ll connect the negative side of the meter to the negative battery post or wire. You’ll then touch the positive side of the voltmeter to the positive battery wire.