Where is the transducer located?

https://www.700r4transmissionhq.com/chevy-impala-abs-light/
This may give you some help. A bad wheel speed sensor will also activate the warning lights.

Check Maxi fuse #3 60 amp in the under hood electrical center #1 .This is power for the #1 cooling fan . Also check the #1 fan control relay in the same under hood electrical center .
These vehicles use 2 360 mm (14.2 in) cooling fans to aid air flow through the radiator. Electric motors drive the cooling fans. These motors are attached to the radiator. Motor size varies with each engine option.
A coolant temperature switch activates the fan motors. This switch regulates voltage to the cooling fan relay. This switch operates the fan whenever the engine coolant temperature exceeds 110°C (230°F). For location and diagnosis, refer to Electrical Diagnosis. A transducer can also activate the circuit, depending on the A/C compressor head pressure going to the condenser.
The engine cooling fan relays provide the high current required for the cooling fan motors using a low current signal coming from the Powertrain Control Module (PCM). This signal is a function of various inputs.
Refer to Electrical Diagnosis for further information and diagnosis of the cooling fan relay.
Electrical Center #1, Underhood (U/H)
RH side of the engine compartment, forward of the strut tower

Coolant blowing out of the top of radiator , is this with the radiator cap on or off ? Do the cooling fans come on ? A coolant temperature switch activates the fan motors. This switch regulates voltage to the cooling fan relay. This switch operates the fan whenever the engine coolant temperature exceeds 110?°C (230?°F). For location and diagnosis, refer to Electrical Diagnosis. A transducer can also activate the circuit, depending on the A/C compressor head pressure going to the condenser.
The engine cooling fan relays provide the high current required for the cooling fan motors using a low current signal coming from the Powertrain Control Module (PCM). This signal is a function of various inputs.
Refer to Electrical Diagnosis for further information and diagnosis of the cooling fan relay.
The crossflow radiator uses a pressure-vent filler cap to allow a buildup of 103 kPa (15 psi) in the cooling system. The cap allows the system to operate at a higher than atmospheric pressure. This pressure raises the boiling point of the coolant to about 129?°C (265?°F) at sea level, which increases the cooling efficiency of the radiator.
If you are unfamiliar with these thing's , I suggest you take your vehicle to a qualified repair shop .
Ifd you don't

How do you know it's overheating ? Are you going by the gauge ? Did you check the actual temp. of the engine with scan tool data . or A inferred heat gun at the upper radiator hose near the thermostat housing . Do the cooling fans come on ?Is the cooling system full ? Is there air in the system ?
A coolant temperature switch activates the fan motors. This switch regulates voltage to the cooling fan relay. This switch operates the fan whenever the engine coolant temperature exceeds 110°C (230°F). For location and diagnosis, refer to Electrical Diagnosis. A transducer can also activate the circuit, depending on the A/C compressor head pressure going to the condenser.
The engine cooling fan relays provide the high current required for the cooling fan motors using a low current signal coming from the Powertrain Control Module (PCM). This signal is a function of various inputs

check and prime the pump as the light may indicate no water and so the pump will not run
foot valves leak back the water so it may need priming again

Mine is doing this!!! Is this a repair that someone can do on their own? My husband is capable of working on engines but if you have any help on how to do this job, location of cool, and any tips- I would GREATLY appreciate the help so I can pass it on to him and get his help.

its usually located in the intake manifold or radiator

I am sorry but fixya has no wiring diagrams for any car or truck. I suggest you try this site www.alldatadiy.com

The first question is: why is hubby punching in codes when he doesn't know the correct code? Is he a lottery winner? It's a 4 digit code, he's got a one in 10,000 chance of getting the correct code. The code can only be entered in one time, and that's the 1st time. The penalty is: you must take the radio out, record the serial number and call the dealer for the unlock code. Only they have it. While you have the radio out, slap the hubby up side the head with it. This usually activates the learning curve regarding attempting to do things you have no knowledge to do.

Then wait 1.5 hrs with key on acc to then push in the correct code.

This should unlock the radio and alarm. They're connected. Why, so someone doesn't run off with your radio and car.

If hubby has done other stuff to further disable car and isn't telling you, remove radio and slap him up side the head with it one more time. The learning curve should then be permanently activated. Then go to dealer with husbands checkbook. At $125/hr or more, it isn't cheap. And they work slow.

THAT SOMEONE THAT SOLD YOU THAT TRUCK NEW THAT TRUCK HAD A PROBLEM, THEY EVEN THREW AN ADDITIVE TO THE CONDITION THE OILS PERFORMANCE BUT ITS TO LATER FOR THAT. REMOVE THE TRANNY OIL PAN AND CHECK THE PAN FOR MUDDY LOOK-ALIKE BUILT-UP. THE PAN WILL TELL YOU ALOT ONCE REMOVED. IF ITS CLEAN CHECK THE MAGNET SOMEWHERE AROUND THE PAN AND REMOVE THE OIL FILTER AND CHECK FOR CONTAMINATION.