Re: improving engine horsepower.
I don't have an opinion, but on RV.NET this is a common topic. The general consensus seems to be that for towing that torque is more important than horsepower.
Re: Chevys and testing if you have a battery isolator.
I have added a battery disconnect switch to the TM. If the TM is plugged in to the TV, TV has ignition off, I can turn on the lights on the outside of the TM. Obviously my Chevy Crew Cab dos not have an isolator of any kind.
Re; engine fires
I would not encourage opening the hood of a car when there is a suspect engine fire. Opening the hood increase the flow of oxygen, which is not a good idea.
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