Vibration at speed
My main concern is that I have a vibration. I notice it mainly under acceleration or at
cruising speed, but not during deceleration. I shifted into neutral at 55 mph and can't feel
it. I turned the motor off and coasted and can't feel it. I checked the motor mounts by
putting it in drive and reverse and revving the engine but didn't notice any lift.
Is the check engine light or service engine soon light on or flashing? -Jim
No, it's not.
Ok, so we know it's not misfiring. Check things like the harmonic balancer, and the engine cooling clutch fan. HTH. -Jim
Looking for a Used Sierra 1500 in your area?
CarGurus has 66,316 nationwide Sierra 1500 listings starting at $1,995.
Search GMC Sierra 1500 Questions
GMC Sierra 1500 Experts