I have a 2003 GMC Sierra. There are two ground wires attached to the

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Brandon

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underside of my hood what are they for? I don't have power locks, windows or seats.
It's an automatic.
Would they have anything to do with my batterie?
I'm sorry I should have been more clear. My truck did not come with power locks, windows, or seats.
 
They stop static electricity caused by the engine and alternator, which may effect your radio and other things. All ground straps are important.
 
they are just ground straps, to help prevent static shock.
 
i would begin with your fuse box its located next to your battery,take off the top to expose the fuses,on the underneath of the lid will be a diagram,telling you which fuse is for your ac and heater.try replacing them they are very cheap.don't concern yourself with those ground wires under the hood they are just in case your vehicle was struck by lightening it would be grounded.
 
If the hood is not grounded it can cause radio interference. Also, if it's painted, it may have been useful in manufacturing, during the e-coat process where the entire body must be electrically charged.
 
i would begin with your fuse box its located next to your battery,take off the top to expose the fuses,on the underneath of the lid will be a diagram,telling you which fuse is for your ac and heater.try replacing them they are very cheap.don't concern yourself with those ground wires under the hood they are just in case your vehicle was struck by lightening it would be grounded.
 
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