Negative battery cable gauge? UPDATE

Cheverado · August 20, 2020

Anybody know what gauge of the negative cable on a 2015 5.3L? I need to replace just the terminal on the end of the cable that bolts to the block. I can borrow a crimper and get a terminal. All i want to do is climb under there and change it. I’ll be damned if i pay GM $94 for a new one.

Edited August 22, 2020 by Cheverado

cooverjosh · August 20, 2020

I would get 0 gage OFC CAN GET FROM DOWN FOR SOUND OR SKY HIGH CAR AUDIO THEY SELL COPPER terminal s good wire bigger better

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diyer2 · August 20, 2020

I think he just wants a new cable end to crimp on.

slj2008 · August 20, 2020

Have you check your local parts store??

Cheverado · August 20, 2020

34 minutes ago, diyer2 said:

I think he just wants a new cable end to crimp on.

Yup

Cheverado · August 20, 2020

25 minutes ago, slj2008 said:

Have you check your local parts store??

Cable is dealer or internet only

LDM · August 21, 2020

I just finished replacing the negative battery cable on my truck a couple days ago after replacing the positive cable a few weeks ago. The negative cable appears to be a 4 gauge wire if you want to make your own. I ended up getting mine off Ebay for around $60 shipped, I also didn't want to pay $100 for a cable from GM. I found the positive cable on Amazon for $12 surprisingly enough. Hopefully my random shut down is fixed now but time will tell I suppose.

You can also go bigger if you want, 2 or 0 gauge isn't going to hurt anything and may actually help. Bigger is always better in the electronics world when it comes to power and ground.

Cheverado · August 22, 2020

So I was able to salvage my existing cable. I flattened the contact area and bent the lug back to the original 90° configuration. It reached to the spot on the block next to the starter (2015-18 location)with no issue other than unsnapping one of the clips. Coincidentally the clip lined up perfectly with a correct sized hole in the chassis. I did a voltage drop test from the battery to the braided jumper on the driver’s side bulkhead and the positive battery cable. Both were well under 1 volt. I just put a nut, lock and flatwasher in the old location to hold the dip stick tube on.