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Discussion Starter #1
When the vehicle is at a stop in Park or in Drive, if I turn the steering wheel left or right the wheel vibrates badly. If I bring the RPM above 1,200 the vibration stops. If I turn the A/C on it gets worse. I brought it back to the dealer that I bought it from. The service writer that checked the car in felt the vibration and verified something is wrong. The Service Manager and a tech checked it. When I picked it up it was the same and like usual no one was available to talk to me. The service order I recieved stated "Roadtested by Tech/Service Manager, no problems found. Operating as designed. I did not know Chevrolet designed vibrations into thier vehicles.
 

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This is a known issue, there isn't anything you can do about it. But to be honest you shouldn't be turning the wheel when the vehicle isn't moving as it puts a lot of additional stress on all of the front end components.
 

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In my opinion the hydraulic steering system attached to the V6 is very weak. Especially with the big rims.

I never turn the wheel while stopped (never have in any car I've owned actually) but even while turning at low speeds I can hear the whine of the pump from inside the vehicle. I don't consider it a problem.
 

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Discussion Starter #4
Not only does it vibrate while the vehicle is stopped but if you let off the brake and are moving at idle speed through a parking lot, the vibration is bad any time the wheel is turning. I was a mechanic for 20 years, turning the steering wheel does not harm the steering or front end components. they are designed to take a much larger load than turning the front tires while stopped.
 

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Terrain said:
In my opinion the hydraulic steering system attached to the V6 is very weak. Especially with the big rims.

I never turn the wheel while stopped (never have in any car I've owned actually) but even while turning at low speeds I can hear the whine of the pump from inside the vehicle. I don't consider it a problem.
Its not that its weak...I feel its because our idle is only 550rpms (below even the I4)
 

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grometsc said:
Its not that its weak...I feel its because our idle is only 550rpms (below even the I4)
That's fine, then why doesn't the computer sense the load and bump up the idle slightly to avoid the shudder and whine during low speed turning movements?
 

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Terrain said:
That's fine, then why doesn't the computer sense the load and bump up the idle slightly to avoid the shudder and whine during low speed turning movements?
I was just disagreeing with the "weak" steering because it has some whine/vibration at idle when steering. I have heard replacing a strainer helps the issue, but it was never a major concern for me...
 

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^ My comment was just rhetorical... if you give it some gas while turning the wheel it behaves a little better confirming your theory is sound.
 

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The dealer now has a fix- this was posted today under "shudder on 2013 Equinox"

New update:
The parts came in and were installed today. No shudder or noise now when turning the wheel! The note from the dealership describing the fix stated :
"Engine firing pulsations being transmitted into the steering system. Installed revised generator. Power steering gear inlet hose and evap hose per PI0814A".
I asked the service manager what the alternator replacement had to do with the steering shudder and he said he and the mechanic were questioning the same thing. Turns out the alternator has a "damper" installed behind the pulley to reduce transmitted vibration into the steering (his explanation). He also said the power steering hose was much larger in diameter and longer than the original hose but the evap hose seemed to be the same as the original. A added benefit to having this work done was the new alternator has a "lifetime warranty" including labor to the original purchaser of the vehicle. The work took a full day after the parts arrived- so this wasn't a simple fix.
Whoo! Done with the vibration and noise!!
 

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@swannerd - thanks so much for the detailed solution to the steering shudder! (http://www.terrainforum.net/index.php?topic=5655.0)

You say it's fixed your steering shudder - I wonder if anyone else in this forum has taken their vehicle in for this fix? Did it work for your 'Nox/Terrain too? I might be taking mine in soon.
 

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... and I just found this other thread (http://www.terrainforum.net/index.php?topic=5228.40)

One question: I'm assuming since GM knows the problem now, GM will be changing this at the assembly line? Do some new 'Nox/Terrains already have this fix? If so, how can I tell if my Terrain already has this fix??
 
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