2001 Oldsmobile Bravada how to

Can I drive without a thermostat in the California weather (climate)
where is the water pump located -

What are the steps on changing a water pump in a 2001 olds bravada and how do I fix any gages ex.
The oil gage and temperature gage

Thanks guys -
I don't think its the water pump but I do have a slight (small - 2 or 3 drops) leak near the left or passenger side of the car left of the oil pan
looks like coolant but am trying to see where it's
coming from

thanks again

Before I started saw 3 or 4 drops of oil on the ground
I drove it a short distance 2/3 miles up and back - and got the reoccurring
oil gage fluctuate from 40 to 20 as I stopped and go (went) the engine gage was low around 200 till I started to come back it went up to 210 which I believe is normal but I did not want to take any chances pulled over for a half an hour and then drove it home sat for an hour and

checked the oil dipstick was fine it seem that the oil had not dropped why does the oil gage indicate that it's going towards the left or towards the #20 from the #40

well the coolant level was fine which I believe means it's not the water pump so I went under the car looked for leaks saw the oil pan slightly moist which I thought it would be coming from the manifold the plug was dry so I grab a paper towel and wiped the pan it was oil and the sides to the right as you face up lying on your back; was slightly wet but could not reach it,
just a little not enough to hit the floor

where is the leak

I'll try the pressure test to the cooling system to see where the leak is

thanks