2014 Yukon XL Denali

[2003DenaliXL]

I am interested in increasing the height of the rear of my truck. When I hook-up my boat trailer it really gets pulled down and the air compressor doesn't seem to raise it much.
I am going to take some measurements and pics tonight and hopefully update this post.
Unfortunately I don't know the tongue weight of my trailer.

 

[Joseph Garcia]

Can you provide information on the year/make/model/engine/2WD-4WD-AWD? This will better help the knowledgeable folks on this Forum provide you with suggestions.

Or, are the truck's specs in your screen name? If yes, then if you have the air ride, and the compressor does not adequately lift the rear of the truck, then you may have leaking air shocks, or an air line leak, or a failing air compressor, or a maladjustment in the ride height rods that are key markers that the air ride system uses to make the correct ride adjustment.

 

[2003DenaliXL]

Sorry for the lack of info.........
2014 Yukon XL Denali, 6.2L, AWD, has Air Ride.
I had the compressor replaced ~2yrs ago. I can hear it come on but doesn't seem to lift the truck much.
If the compressor comes on I assume it senses the load, will it shut-off automatically even if it doesn't reach the proper height?

TIA........

 

[kbuskill]

Sorry for the lack of info.........
2014 Yukon XL Denali, 6.2L, AWD, has Air Ride.
I had the compressor replaced ~2yrs ago. I can hear it come on but doesn't seem to lift the truck much.
If the compressor comes on I assume it senses the load, will it shut-off automatically even if it doesn't reach the proper height?

TIA........

The compressor will run until it reaches ride height OR the pump runs for 255 seconds or 4 minutes and 15 seconds... which ever comes first.

The 255 seconds is a safety setting built into the suspension control module which keeps the pump from overheating.

I would check the bladders on your air shocks by feeling them to see if they are firm/stiff and also spraying them with soapy water to see if they bubble. Doing this with the trailer hooked up and the key in the ON position would be best.

The air shocks have about a 1000 pound capacity so as long as your trailer's tongue weight isn't excessive the shocks should have no trouble leveling the truck out.

 

[2003DenaliXL]

Thanks for that info...........should the bladders feel firm w/o a load?
On my last '03 Denali I replaced the shocks w/ Arnotts.....might need to do the same here!

 

[kbuskill]

Thanks for that info...........should the bladders feel firm w/o a load?
On my last '03 Denali I replaced the shocks w/ Arnotts.....might need to do the same here!

They probably will be firm but with a load they should definitely be firm.

You can also reach under the truck first thing in the morning before turning the key on and see if they are soft.

If they are soft then there is a leak somewhere in the system, most likely the shock bladders but the soapy water will tell you for sure.

 

[2003DenaliXL]

Assuming I need to replace the shocks..........what's the recommendation?

 

[kbuskill]

Assuming I need to replace the shocks..........what's the recommendation?

The Arnotts are good quality and good warranty.

They have a couple different options. The AS-2708 is a factory original AutoRide/Auto leveling shock that Arnott rebuilds with heavy duty, upgraded, bladders. They allow you to retain the AutoRide portion of the factory suspension which is the automatically adjusted dampening of the shock as well as the auto leveling portion which adjusts for added weight.

They also have other shocks available that only retain the Auto leveling, air portion, while eliminating the AutoRide portion by using a resistor built into the shock to trick the suspension control module so you don't end up with warning lights on your dash.

There are also other companies that have offerings as well but I only have first hand experience with the Arnotts.

 

[mikeyss]

Assuming I need to replace the shocks..........what's the recommendation?

I recommend the factory rear shocks. You can get them from RockAuto, and usually you can get a 5% discount using a code supplied in the vendor section. If the compressor hasn't been replaced, it's a good time to do that as well.

 

[2003DenaliXL]

The Arnotts are good quality and good warranty.

They have a couple different options. The AS-2708 is a factory original AutoRide/Auto leveling shock that Arnott rebuilds with heavy duty, upgraded, bladders. They allow you to retain the AutoRide portion of the factory suspension which is the automatically adjusted dampening of the shock as well as the auto leveling portion which adjusts for added weight.

They also have other shocks available that only retain the Auto leveling, air portion, while eliminating the AutoRide portion by using a resistor built into the shock to trick the suspension control module so you don't end up with warning lights on your dash.

There are also other companies that have offerings as well but I only have first hand experience with the Arnotts.

Are these the ones that don't support the AutoRide? AS-3430

 

[kbuskill]

Are these the ones that don't support the AutoRide? AS-3430

I believe so.

 

[Foggy]

Assuming I need to replace the shocks..........what's the recommendation?

I used the OE Gm Shocks when I replaced mine last year.. I wasn't having any
issues, but I decided to replace them before I started towing (and I added a
helper air bag to the coils too) since I'm towing really "heavy". I wanted
to keep the OE functions in tact. Some the arnott stuff just "tricks" the sensors
and does not keep the the Z55 autoride function, even though it does keep
the ride height/auto leveling.. It wasn't much of a price difference, so I decided
to keep the OE stuff
I kept my original shocks that work fine btw, just "in case"

 

[Joseph Garcia]

I used the OE Gm Shocks when I replaced mine last year.. I wasn't having any
issues, but I decided to replace them before I started towing (and I added a
helper air bag to the coils too) since I'm towing really "heavy". I wanted
to keep the OE functions in tact. Some the arnott stuff just "tricks" the sensors
and does not keep the the Z55 autoride function, even though it does keep
the ride height/auto leveling.. It wasn't much of a price difference, so I decided
to keep the OE stuff
I kept my original shocks that work fine btw, just "in case"

Do you happen to recall what part numbers you used for your OEM replacement shocks? If not, no worries.

 

[Foggy]

ACDELCO 5801092 {Click Info Button for Alternate/OEM Part Numbers} GM Original Equipment Info
Rear; RWD; Denali; CHASSIS PKG(Z55)

This is from rockauto website. AC Delco 5801092.. I "may" have gotten them
from amazon or summit racing.. I just compared for the best value with shipping/tax
etc... But summit racing has the very best warranty and return policies, so I try to
use them if they close to the price

This is for the RWD only

 

[Foggy]

ACDELCO 5801094 {Click Info Button for Alternate/OEM Part Numbers} GM Original Equipment Info

Rear; CHASSIS PKG(Z55)

This is for the AWD my post above is for the RWD
I missed that when I looked it up at first


ACDELCO 5801095 {Click Info Button for Alternate/OEM Part Numbers} GM Original Equipment Info

Rear; AWD; CHASSIS PKG(Z55)


I'll have to go out to the back garage and see which ones I actually used - I have the
originals in the new boxes.
But it's snowing out right now.. so might be later today

 

[Foggy]

https://www.summitracing.com/parts/ADO-580-1095

These are the ones I bought. I was able to look it up at Summit Racing.
I have the Z55 susp, 20 inch wheels, AWD
I "think" the other awd z55 part # is for the 22" wheel option.
I have no idea why it would matter....

 

[Foggy]

I paid $220 for them from summit last year.. I see the price is $305 NOW
So maybe I price matched them or the the price is just stupid now.
Monroe makes an equivalent, but the price wasn't any better at the time

 

[2003DenaliXL]

I checked the bladders tonight after I had the trailer connected and they were stiff/firm.
When I hooked-up the trailer the compressor came on after the load was there and the truck only came up ~ an inch.
The bladders were stiff/firm.......disconnected the trailer and ran s few errands, checked the bladders after the truck was off for ~ 30 min and they were soft........is this normal?
I am going to check in the morning before going to work.

 

[kbuskill]

I checked the bladders tonight after I had the trailer connected and they were stiff/firm.
When I hooked-up the trailer the compressor came on after the load was there and the truck only came up ~ an inch.
The bladders were stiff/firm.......disconnected the trailer and ran s few errands, checked the bladders after the truck was off for ~ 30 min and they were soft........is this normal?
I am going to check in the morning before going to work.

They should never be soft... soft = leak.

Especially after only being off for 30 mins.

Time to break out the spray bottle and soapy water and start spraying the bladders and compressor and lines/fittings.

 

[2003DenaliXL]

Thanks.........