How To: The Big 3

cmatt

New Member
Feb 22, 2013
19
2
3
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
2007Sierra031.jpg


Test fitting the battery terminals
2007Sierra034.jpg


For the battery to frame lead, I used a common ground bolt almost directly below the battery.
2007Sierra040.jpg


Here's a shot of the bolt looking from underneath the truck.
2007Sierra041.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.
2007Sierra046.jpg


Making progress.
2007Sierra044.jpg


Some finished pics:
2007Sierra048.jpg


2007Sierra047.jpg


2007Sierra043.jpg


2007Sierra049.jpg


2007Sierra050.jpg


2007Sierra051.jpg


Please feel free to ask any questions or add comments. Forklift or Rattron, let me know what you think.
:endofshow
 

Cheeny23

Resident Wop
Staff member
Jan 8, 2011
6,615
336
83
Bakersfield
doesn't need to be different cable, but approximately 16ft. to be safe, that will leave you with about 2 ft extra if done correctly