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Gm Tech (Cam)
Gm Tech (Cam), GMC Mechanic
Category: GMC
Satisfied Customers: 1660
Experience:  GM Grand Master Technician 2007. 14 year experience.
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I just had a remanufactured engine, transmission, and

Customer Question

I just had a remanufactured engine, transmission, and transfer case installed in my 2002 Yukon.
I had Alexander's GMC in Oxnard Ca. do all the work. Upon picking up my Yukon I discovered that when the engine is at idle, there is a mild vibration felt throughout the car. This is never been the case on my vehicle since I have owned it. I bought the car certified from them in 2005. This is the second engine replacement since I bought it. Both engines had leaking heads.
Thank you.Jack Kelly
Submitted: 2 months ago.
Category: GMC
Expert:  Gary replied 2 months ago.

does the shop feel this vibration also ?

it is just at idle ?

Customer: replied 2 months ago.
The shop does but they can't figure it out. There are no codes showing up so they don't think there is a problem. My gut tells me it is something internal in the engine. Maybe a crank shaft out of balance?
Expert:  Gary replied 2 months ago.

that is a tough one to narrow down

off idle it is fine i mean in park off idle its fine ?

Customer: replied 2 months ago.
It vibrates at idle, in park, in drive waiting for a traffic light. Hard to notice at highway speeds.
Expert:  Gary replied 2 months ago.

and they are sure the motor mounts and transmission mounts are not ripped at all and not grounding out so to say on any of those mounts and they are tight ?

Customer: replied 2 months ago.
They claim to have replace the motor and transmission mounts at the same time.
Expert:  Gary replied 2 months ago.

will it vibrate with the torque converter unbolted off the flexplate ?

do they have a vibration analyze ?

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