The fan makes a lot of noise

https://www.modifiedlife.com/2004-isuzu-rodeo-car-radio-installation-schematic/

to brakes or m/T clutch,
for brakes its above brake pedal on fire wall. in front of the booster.

alldata.com login and read. its all there.

cooling whom or what?
you (cab blower) , the engine RAD, the front, condenser
try to point and say this fan here, makes noise.
a place, pretend the helper is totally blind,
or even use photos., (shock)

Regular gas is recommened for the 2004 Izusu rodeo.

Sounds more like the alternator is still not putting out 100%...eventually your Izusu will quit running with a defective alternator...please have tested...so you don't get stranded...the battery will only run the car until it becomes low on power...sometimes the first sympton is limited acceleration...ie. can cause auto/shifting to be inconsistent...if high mileage, also consider adding a bottle of Lucas Oil Transmission fix...no draining necessary...excellent results. Hope this helps.

You should be able to remove a panel on the inside of the tailgate and open it manually.

4cylinder1342
6cylinder153624
if its a v i dont have

You will have to take it off from underneath,it bolts to the transmission housing in the rear of the engine.

OK.

No the fan clutch doesn't need to break in. I've never heard of that and I'm a mechanic owner/operator. Our personal car is a Trooper with a 3.2L The roaring noise is normal but the timing on your Rodeo sounds like it's retarded somehow. I'd take it back to him and have him deal with it. As an owner/operator, I would definitely make sure the customer is happy with their car no matter if I was to spend a little money out of my pocket to make it right and keep the customer. He should do this for you as a shop warranty. The roar should only be heard right after start up and go away or leaving a stop light on a hot day but only for a few seconds.