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The 2001 Yukon Denali has a very poor gas mileage per gallon. The gas tank capacity in these vehicles are 26 gallons.
DEXRON iii ATF
If fluid is full - bad sensor?
Use an 80-90wt gear oil
they cannot or the clutches will burn out
Trouble code P0440 means:Evaporative emission control system malfunction
Inside the gas tank.
There are several steps to changing a water pump in a 2001 GMC Yukon Denali. You must first make sure the engine is cool, and drain the radiator of coolant. You will then need to remove the air duct and housing. You will also need to move or remove the radiator hose, radiator fan shroud, serpentine belt from the alternator, water pump pulley, and old pump gasket?æto access the water pump. You can then replace the water pump, and then replace the parts that you removed.
It should use 5W-30. It will say on your oild cap, but that is probably what is recommended.
Your 2001 gmc Denali is all time 4 wheel drive. It doesn't turn off. Only the slt, sl, and lower models have a push button 2 wheel to 4 wheel drive.
I have a 2001 4.7l. Mine had no drain valve on it. I just took off the lower hose and let it drain that way.
More than likely Dexron 3. Call your local GM dealer to be 100% sure.