I have a 2006 HHR 2LT and it is making a loud growling sound as I drive.

Do not listen to this guy

Svetoslav Ganchev You don't just replace parts without testing . What's battery voltage at ? Does the car start an run ?

The problem can be your tires. To verify rotate front tires to back.

This could be one of two things. We will first start with a wheel bearing. When you are driving, does the growling noise get louder as you go faster. Some times is will sound like you have a helicopter flying beside you depending on how bad the bearing is. The second thing that could be causing the growling noise is your transmission. There are also bearings inside your transmission that could be causing the noise. If you have a cvt transmission, you have a 120,000 mile warranty and can have it repaired at no cost to you. You will just have to go to a nissan dealership.

Get it into a shop

If we could guess down to every failed
part & the cost of repair, it still is not safe
to use as is

My daughters 2006 HHR LT was making a grinding / Bearing noise .I took it to a local mechanic to let him test drive it. He didnt even drive it 100 feet and imediately said "You have a wheel bearing out" He changed out the assembly for around $200 and it is good as new. Hope that helps

sounds like a wheel bearing if you jack the car up so wheel is off ground and then hold the top and bottom of wheel and try to move it back and forth which ever wheel moves is the bad wheel bearing sometimes though it may not move in this case take it to a local mechanic for further inspection

I Think it must be Sylancer Mounting Bracket or Mount Problem

Could be either a loose belt or you are low on power steering fluid,or the power steering pump could just be worn out.

It is at least one of your wheel bearings. I had all four of mine replaced before 40000 miles I hope that it is under warrantee

It might be your AC compressor. When it makes this sound, turn the AC blower to O or OFF and see if it stops the noise. If it does, then see your local dealer or respected auto AC specialist.