Electrical system autormator replacement

I wouldn't recommend replacing an 80-amp mega fuse with a 100-amp fuse in a 2008 Equinox. The mega fuse is designed to protect the electrical system from excessive current, and using a fuse with a higher amp rating could potentially cause damage to your vehicle's electrical system or even cause a fire.
It's important to use the correct fuse rating as specified by the manufacturer. Using a fuse with a higher amp rating than specified can result in the fuse not tripping and protecting the electrical system in the event of a short circuit or other electrical problem

Removal Procedure
Caution: This vehicle is equipped with a Supplemental Inflatable Restraint (SIR) System. Failure to follow the correct procedure could cause the following conditions:
• Air bag deployment
• Personal injury
• Unnecessary SIR system repairs
In order to avoid the above conditions, observe the following guidelines:
• Refer to SIR Component Views in order to determine if you are performing service on or near the SIR components or the SIR wiring.
• If you are performing service on or near the SIR components or the SIR wiring, disable the SIR system. Refer to Disabling the SIR System.
Disable the SIR system. Refer to Disabling the SIR System in SIR.
Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.
Disconnect the battery negative cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
Position the steering wheel half way between the upper and lower tilt stops, if necessary.
Remove the steering wheel. Refer to Steering Wheel Replacement .
Remove the tilt lever. Refer to Tilt Lever Replacement - On Vehicle .

Remove the lower steering column trim cover retaining screws.
Remove the lower steering column trim cover.

Remove the upper steering column trim cover retaining screws (3).
Buick Ignition Lock Cylinder Replacement

Check fuses in fuse box (es). Did they all quit at once?

Make model year and engine ?

Electric power assist is a recall on the cobalt. Take it to a Chevy dealership and they will replace it free of cost

I understand replacing the battery

I have no idea why or how many fuses you replaced
I can see replacing any that may have blown, but not
any other ones

A fuse is just a piece of metal, it doesn't know polarity
or fail as a result.

It seems no one understands the diagnostic connector
is only to check for stored codes, unless your going to go
for a test drive with professional scan tool software

I would look for an open fusible link.

They may be a plug in like a relay,don't know

You need reference material or owners manual for that

crank sensor needs tested and replaced

get the code so you know what system is causing this

Try replacing the tensioner pulley or the belt or both.