Can hear a moaning noise comming from frontend it is louder as you slow down close to stopping and also when you are going around 25 to 35 or so and you have your foot barely touching the gas. if you take your foot off the gas and start to decel it goes away or if you start to accelerate it seems to be less noticable,but when you reach the desired speed and are cruising along it is very noticable
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You should check the power steering fluid level first. However, you said the noise gets louder if you turn the wheel. That sounds like a front hub bearing. To check the front and rear hubs, raise the tires off the ground one at a time. Try to move the tire in & out at the top, sides and bottom. spin the tire if you can. Only a tiny amount of play, if any, is acceptable. If you hear or feel rumbling or roughness when turning the tire, the hub is bad and must be replaced
Without hearing the noise, it is hard to diagnose. If you replaced the bearings and the noise level is correlated with the speed of the vehicle - I'd look at the wheels/tires. They may be out of balance or you could have a radial shift in one of the tires. Rotate the back tires to the front and front to back. See if that changes the pitch or noise level.
Check to see if the surface of the tires have even wire, because that will give off a moaning sound that you are hearing while the car is driving. The only other logic that comes to mind could be rear wheel bearings.
The Denali's are really susceptible to front dif. wear and failure. Because it is AWD, the front dif is always working unlike a 4WD. GM, in order to lighten up the front end built the front dif in aluminum. If it was the same as the rear, it would be bullet proof, but much heavier. After about 80,000 miles it is common to have bearings failing. Remove the drain plug which happens to be magnetic. You may see more than just the normal fine filings. You will likely see larger chunks of metal some of which is not even magnetic but will drain out with the oil. You are likely looking at a $1500 rebuild. It will get much louder and run for a long time before it really goes south.
hi from uk from your symptoms re moaning frm drivers side ? assume front?? best advice at this stage is to raise the front wheel and check for any undue wear in the wheel bearing by rocking the wheel top and bottom there should not be any tilting of wheel ? also make sure the wheel is free to rotate with no noise /roughness if so ? then you have a front wheel bearing failing however whilstyou check drivers side? also check the other wheel for same and it would be a good idea to check brake pads for wear during checks as you can do these if/when it becomes apparent the wheel bearing req's attention? all the above is subject to assuming you have checked tyres and pressures are correct ? you could pop car into local tyre depot and they could do checks on above for a quick diagnosis? hope this help check it out ASAP as this could be serious best wishes