Next Step for Rough Ride?

[DenaliRider4]

2018 GMC Yukon Denali 2wd

No Codes or service suspension system message

After towing a boat one time the yukon has been riding rough. Replaced the front struts and rear air ride shocks thinking this was the problem since it has 110k miles i know they dont last forever. Still riding rough. Tested my compressor by putting weight in the back on the yukon and it pumped it like it was suppose to. Took the weight out and it did relieve the pressure and dropped back down to normal ride height slowly. *Side note* the compressor does not cut on every time during start up. but the bags are firm so im guessing its not needed to cut on unless called upon to. What should be my next step? Get a tech 2 type scan tool and look at the live data for suspension parts? Thanks guys!

 

[Joseph Garcia]

Welcome to the Forum from NH.

Lots of knowledgeable folks here who freely share their knowledge, experiences, and perspectives. Knowledge is power.

I hope that you will become a participating member in the Forum's discussions.

Pics of the truck, please.

I cannot personally assist you with your issue, but other members of this Forum much more knowledgeable than me in this area will chime in.

A Tech 2 won't help you with your model year, so you will have to go with a newer scanner. With the correct bi-directional scanner (@Doubeleive, can you suggest a correct scanner for the OP?). With the correct bi-directional scanner, you could view each shock in real time to see if one or more of them are receiving 'stiffer' signals, when they should not be. If this were the case, then you may need a new electronic controller for your suspension.

 

[Doubeleive]

2018 GMC Yukon Denali 2wd

No Codes or service suspension system message

After towing a boat one time the yukon has been riding rough. Replaced the front struts and rear air ride shocks thinking this was the problem since it has 110k miles i know they dont last forever. Still riding rough. Tested my compressor by putting weight in the back on the yukon and it pumped it like it was suppose to. Took the weight out and it did relieve the pressure and dropped back down to normal ride height slowly. *Side note* the compressor does not cut on every time during start up. but the bags are firm so im guessing its not needed to cut on unless called upon to. What should be my next step? Get a tech 2 type scan tool and look at the live data for suspension parts? Thanks guys!

unless you are getting a error message in the cluster then it may not be electronic
when you replaced the shocks was that with oem or compatible shocks
by that i mean are they passive or active?
if you want to look at the data stream you will likely need a scanner in +$300 range, more like $500 such as a middle grade autel. there are many models of autels out there, just going to have to pick one.
there are cheaper options but unless you have some technical pc skills and a spare laptop, it may not be the best option

 

[DenaliRider4]

unless you are getting a error message in the cluster then it may not be electronic
when you replaced the shocks was that with oem or compatible shocks
by that i mean are they passive or active?
if you want to look at the data stream you will likely need a scanner in +$300 range, more like $500 such as a middle grade autel. there are many models of autels out there, just going to have to pick one.
there are cheaper options but unless you have some technical pc skills and a spare laptop, it may not be the best option

I replaced the struts with TRQ SCA33131 and the rear shocks with TRQ SBA42898. Might be my problem since I didn’t use actual OEM parts? If so lesson learned for sure but was thinking these should work.

 

[mikeyss]

Just thinking out loud, but don't you have to do a relearn for the suspension module. I have an 09 (I know this is the K2 platform we are talking about here) but when I replaced my Z55 components, I had to do a relearn as well as replace a resistor under the hood

 

[blackelky]

I replaced the struts with TRQ SCA33131 and the rear shocks with TRQ SBA42898. Might be my problem since I didn’t use actual OEM parts? If so lesson learned for sure but was thinking these should work.

Trq makes garbage replacement parts

 

[Doubeleive]

I replaced the struts with TRQ SCA33131 and the rear shocks with TRQ SBA42898. Might be my problem since I didn’t use actual OEM parts? If so lesson learned for sure but was thinking these should work.

should but... there is a reason why they are half the price.
you might want to see that data feed to verify they are working as designed.

 

[Doubeleive]

Just thinking out loud, but don't you have to do a relearn for the suspension module. I have an 09 (I know this is the K2 platform we are talking about here) but when I replaced my Z55 components, I had to do a relearn as well as replace a resistor under the hood

you are supposed to do a relearn so it knows where "0" is basically, but I never noticed any difference and I am pretty sensitive to how my vehicle handles, I noticed a difference with just a slow leak and a few minutes of driving.

 

[DenaliRider4]

should but... there is a reason why they are half the price.
you might want to see that data feed to verify they are working as designed.

Do you have a recommendation of n which model autel you like?

 

[Doubeleive]

Do you have a recommendation of n which model autel you like?

for the Autel I do not, I am sure a couple members may chime in with one they have used or have considered purchasing.
I do have this Launch saved in my Amazon list, it seems to have a lot of features not sure if it would read suspension data or not, might take a little research, the price is reasonable to me for what it features. I have not bought it because I do not have a need for it currently so I couldn't even go out and see if it does read the data

https://www.amazon.com/dp/B09XV8VR35/?coliid=I12BKIUIMX4MBV&colid=2SGVZRQ092CSJ&psc=1&ref_=lv_ov_lig_dp_it

 

[Joseph Garcia]

Just thinking out loud, but don't you have to do a relearn for the suspension module. I have an 09 (I know this is the K2 platform we are talking about here) but when I replaced my Z55 components, I had to do a relearn as well as replace a resistor under the hood

Can you provide additional details or a reference on the relearn procedure? Also, why did you need to replace a resistor under the hood?

 

[mikeyss]

Can you provide additional details or a reference on the relearn procedure? Also, why did you need to replace a resistor under the hood?

When I bought the stock replacements from rockauto, they sent a new relay that instructs you to replace the old one. The relearn procedure, you need a tech2 and there is options in the ALC for module relearn. I have relearned my system twice, once after replacing the old shocks, and once after I permanently removed my 3rd row seats

 

[Joseph Garcia]

When I bought the stock replacements from rockauto, they sent a new relay that instructs you to replace the old one. The relearn procedure, you need a tech2 and there is options in the ALC for module relearn. I have relearned my system twice, once after replacing the old shocks, and once after I permanently removed my 3rd row seats

OK. Thank you for your reply. I am familiar with the ALC procedure, but I was not sure that you were referring to that.

 

[Flyboygt]

hi all,

jumping in here with issues on the magnaride replacement. i have a 2017 tahoe with 60k miles, I went with the strutmasters kit, installed and the ride is still very "clunky" every bump is hard and lots of chattering throughout the cabin after hitting a bump, and vehicle throwing you around. not the same ride as when it was new. Dealer says its all plug and play no need for any computer relearning.
I guess im on my own with the relearn function, but also anyone have issues with the control arm bushings? mine look like there is some cracking, theres a lot of rubber noise when riding over speed bumps/things in general (audible over the radio esp. on cold days). looking at the Autel maxidas das808s for the relearn function. bushings are cheap but install sucks(i dont have a press to get them in), more looking at full control arm replacements from Moog with bushings and new ball joints already installed. roughly $500 for the Cont. arms and 500 for the Autel...

thoughts?