Check the fluid in the power steering. If it is low the car will make noise when you turn the wheel.
Inspect the steering components, suspension, and brakes.
One reason why power steering might make noise only in hot weather is due to a worn belt that heats up during the hot weather. It could also be caused by a leak. You should check the power steering fluid to see if it leaking.
Could be your steering fluid is low? My 1982 GMC pickup truck makes a noise when my steering wheel fluid gets low.
mine needed power steering fluid
the car may be low on power steering fluid
It could be low on power steering fluid. That is a common problem. It makes a sharp whining noise when you turn the steering wheel.
If it is a whining noise, the vehicle is low on steering fluid or the power steering pump may be going bad. If it is a clicking noise, the CV joints may be going bad. NOPE a Saturn vue has electric power steering and no pawer steering pumpA Saturn vue has 4 stabilizer links and they are made of plastic Moog makes metal replacements for the front but the rear still come from the dealer and are plastic they wear out and make noise when you turn replace them and the noise should go away
possibly you need a better grade of gas?
try checking fluid level
as far as the humming noise and the grinding noise it sounds like your power steering pump is either out of fluid or gone bad completely. as for the muffler? ?MAYBE? the strain from the bad power steering pump is overworking the engine causing it to make noise? answer definetly a bad steering pump as for muffler, the sound can be transfred and magnified on a car, replace steering pump before bothering about the muffler sound may be gone
It's probably normal, the power steering fluid need to warm up.