While driving I have noticed that its a weird on/off vibration at higher speeds. Better to explain it is like the whole car vibrates up/down in a rapid motion. When slowing down to 25 mph and lower its a up/down feel.

 

Just to start....Have you checked your tires for out of balance, out of round, checked wheels for being damaged/bent?

 

Re torque your lug nuts 100 ft/lbs and the axle nuts 155 ft/lbs , then take another drive

 

I will get it checked shortly. I did get my TPMS changed on my front right tire almost 2 weeks ago. I will pin point that and your other suggestions.

 

Will do!

 

Did you watch the wheel get balanced when the TPM was replaced?

 

Also, you need to tell your tire guys what pressure you want to run or they are likely to just make something up.

 

I don't believe he balanced the tire. I surely hope he didn't bend my rim either...

 

Is there a hhr pressure spec I need to follow? Or do I go by whats written on the tire?

 

Go by what's on the sticker on the drivers door jamb.