Big 3 Upgrade! HELP!
 

I just started on the Big 3 Upgrade. So far, I’ve gotten the positive battery cable pulled from the battery in the rear to where it goes under the carpet & under the back seats. Where can I go to pull it from there? Please tell me there isn’t anymore of the little gray zip tie tie down things in between the back seat and the firewall. Any help is GREATLY APPRECIATED! TIA!
2010 HHR LT
2.2L

Big 3 upgrade? You mean you’re replacing the battery positive cable? Follow the red cable all the way to the fuse box up under the hood.

There is a link to FREE shop manuals in my sig. There is a view of the interior floor pan in it.
You will need to remove the seats and the carpet.
I have no idea what6 a "Big Three Upgrade " is.

Big 3 Upgrade….
 

Upgrade (+) Positive Battery Cable to Alternator, (-) Negative Battery Cable to Ground, & (-) Engine Block to Ground ALL to OFC 1/0AWG Cable.

I guess it is code for something.

I gotta ask... do you know that positive battery to alternator is 3 separate cables?

I’m not seeing why this upgrade is required, the factory cables are more then adequate for the job.

Sounds like farcebook silliness.
Why? Planning on some huge load, like an electric oven? If that is the plan you will need a lot bigger alternator.

Jesus Guys…I will be installing a new sound system in the coming weeks. 4k-5k watts of power. Does this make sense now?

Nope, we’ve seen many times big installs but never a wire upgrade. Second batteries and larger alternators .