vibration-low idle speed?

[tahoe LT 99]

I've noticed lately some vibration in the tahoe when i'm idleing in park or drive, it's not a hard vibration by any means it's pretty light but I know it's not right.

My idle speed seems low also....between 500-600 rpm. Is this normal?
Could the low idle and the vibration be linked?

Any suggestions to either one would be great.

[tahoe LT 99]

Originally Posted by tahoe LT 99

I've noticed lately some vibration in the tahoe when i'm idleing in park or drive, it's not a hard vibration by any means it's pretty light but I know it's not right.

My idle speed seems low also....between 500-600 rpm. Is this normal?
Could the low idle and the vibration be linked?

Any suggestions to either one would be great.

I forgot to mention that the RPM is stable around 550 if that helps at all.

Any clues on this one?