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2010 GMC Yukon harsh ride

Tiny
SAEED.ALMEQ
  • MEMBER
  • 2010 GMC YUKON
  • 6.2L
  • V8
  • 4WD
  • AUTOMATIC
  • 70,000 MILES
Hi
my Yukon Denali has a very harsh ride. I drove another friends Denali and its so smooth that I can barely feel any thing in the road.I changed suspension parts ( struts and there seats, high sensors, ) but still ride harsh. No Any code (checked by dealer ) no any play in wheels, bushing ok. Please help me with stiff ride.I'm very despaired.

best regards,
saeed
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Tuesday, August 12th, 2014 AT 12:13 AM

12 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
I it electronic suspension? If so check to see if compressor works and or all the sensors aren't stuck in position check for air leaks as well
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Tuesday, August 12th, 2014 AT 4:03 AM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Check for a broken rod there are one on each side in front and one in rear. I hit the send button by mistake.
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Tuesday, August 12th, 2014 AT 4:07 AM
Tiny
SAEED.ALMEQ
  • MEMBER
  • 17 POSTS
I replaced all 4 sensors, new shocks, new strut seats, performed trim height calibration. Nothing work.
I drove a lot of Denali truck and suv ride is compared 10000% difference.
Gm truck and suv with this suspension has the best ride.
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Tuesday, August 12th, 2014 AT 5:57 AM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Have pro rescan it as something isn't right as it shouldn't do that. You need a pro style scanner for this not one from an autoparts.
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Tuesday, August 12th, 2014 AT 8:47 AM
Tiny
SAEED.ALMEQ
  • MEMBER
  • 17 POSTS
The car is checked in the dealer and no code found also dealer cant find problem
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Tuesday, August 12th, 2014 AT 8:49 AM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Hen check your work something isn't put on correctly or not using electronic shocks which should have electric plugs on top maybe the arms of the sensor are on backwards and are up to high for sensors to read anything. I have no further suggestions as I can't see what h as been done to it.
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Tuesday, August 12th, 2014 AT 8:52 AM
Tiny
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  • 17 POSTS
Can it be coil springs or top strut plug cause its the only thing not replaced
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Tuesday, August 12th, 2014 AT 8:56 AM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Without seeing it I have no idea. Recheck your work as I last suggested. I have no further comments
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Tuesday, August 12th, 2014 AT 10:33 AM
Tiny
SAEED.ALMEQ
  • MEMBER
  • 17 POSTS
What voltage can I get from damper solenoid?
I checked pin A and found 9. XxV and pin B is low ref
is it ok
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Thursday, November 6th, 2014 AT 6:11 AM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Between a 7 b you should have.7-3.3 ohms if not that replace the damper. If your service ride control or service suspension light is on it must be scanned. If you replaced all of those parts then did not have it reset with a full tank of gas then that is your problem. You need a scanner pro model to test between A & B not voltage to see if it is properly working or not
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+1
Thursday, November 6th, 2014 AT 12:10 PM
Tiny
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  • MEMBER
  • 17 POSTS
Measured ohms all ok. I did alc trim height with full tank still the same.
I have a pro scanner but I can see damping % only. When u put it in gear damping go to 20% the 0 as soon as u let the brake pedal and move. While driving it show 0 % on high way. Its barley some times show 20% or 100% on 30 min drive.
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Friday, November 7th, 2014 AT 12:03 AM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Without actually seeing this physically I can go no further giving you an answer. I would check with dealer to see if there is a software enhancement for the module and check module ground as well as seeing if ride height sensors are installed correctly and links not broken. I have no further comments.
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Friday, November 7th, 2014 AT 12:47 PM

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