I've taken her to the shop twice in the past 2

buy a multi meter, and start probing :) there are tons of educational vids on youtube on using multimeters to diagnose and fix electrical problems :) basic multimeters for diy cost almost nothing.
some of the vids:

Electrical Troubleshooting Basics EricTheCarGuy

Fixing Strange Auto Electrical Problems

DIY Testing Fuses

Sounds like battery cable is no longer connected to the battery post clamp. These can be repaired but I would recommend a new cable or cables. Parts store can ook up correct ones. Be sure battery terminals are clean before installing new cables.

Assuming the engine temperature is ok, I would look for a solenoid on the heater hose near firewall. If equipped, it could be stuck.

Find your low level sensor on the overflow bottle. Sometimes they come embedded and molded into the bottle and you just change the overflow bottle, sensor and all. Should be same as most Caprices.

The hoses that are "cut" are silicone and better quality if properly cut. They withstand more heat, but Molded hoses have advantages too.

What I do not see here is any mention of a Thermostat. Lack of one would explain low temp readings. Also if you saying "Beyond the cold" is below the cold mark, then the water temp sensor(sends info to dash) may not work or the dash gauge is broke. When the car engine runs, it should move higher than cold.

You will need proper operating temperature for all the engine controls to work normally and will get better gas mileage.

First you need to let the engine run until it gets past operating temperature.With the fan blower harness unplugged use a multimeter and probe the harness on the red wire.You should have 12 volts,The other wire should have negative ground.If the voltage checks out ok then you have a faulty fan motor,If not then you have a electrical issue.

Not really, unless there is a shift kit in there. Have a transmission shop check it out.

I have a 1994 chevy caprice classic LS. 4.3lLMy odometer meter works off and on...why does it do that? Sometimes I cans see how fast I'm going.. Other times the numberes don't light up. Same problem happen with my signal lights.. They both occur at the same time.. my signal light indicater and my MPH odometer.

sheesh... you tell us...your looking at it.... my guess is a T30 torx

you turn the black harnes clock wise and then the light bulb and harnes shuld come out

Please take it to a shop have a scan done before you cook the head.