Big 3 Upgrade
 

The "big 3" upgrade is a common mod done by owners. It involves upgrading the size and quality of wire for the battery and alternator. This will provide better current flow which can affect many aspects of your vehicle (i.e. less voltage drop, no dimming lights, even better mileage, etc...).

There has been some debate on whether or not to fuse the lead from the battery to the alternator. I chose to have the extra insurance and fused it with a 200amp waterproof ANL fuse.

For parts, I ordered my supplies from knukonceptz.com. Good quality and value for the price. Most go with 1/0 gauge wire. You could even use welding cable.

I followed the paths of the factory cable and finished everything off with wire loom.

On the (-) side:
Battery to chassis
Battery to block

On the (+) side:
Battery to alternator

On with the pics:

Le parts
http://i216.photobucket.com/albums/c...7Sierra031.jpg

Test fitting the battery terminals
http://i216.photobucket.com/albums/c...7Sierra034.jpg

For the battery to frame lead, I used a common ground bolt almost directly below the battery.
http://i216.photobucket.com/albums/c...7Sierra040.jpg

Here's a shot of the bolt looking from underneath the truck.
http://i216.photobucket.com/albums/c...7Sierra041.jpg

The ground bolt on the block is hard to see. Removing the plastic splash guard just under and behind the front of the truck will help immensely.
http://i216.photobucket.com/albums/c...7Sierra046.jpg

Making progress.
http://i216.photobucket.com/albums/c...7Sierra044.jpg

Some finished pics:
http://i216.photobucket.com/albums/c...7Sierra048.jpg

http://i216.photobucket.com/albums/c...7Sierra047.jpg

http://i216.photobucket.com/albums/c...7Sierra043.jpg

http://i216.photobucket.com/albums/c...7Sierra049.jpg

http://i216.photobucket.com/albums/c...7Sierra050.jpg

http://i216.photobucket.com/albums/c...7Sierra051.jpg

A Worthwhile upgrade for any ride, and absolutely nesscesary for Big stereo or Bag Suspensions.