2007 Rear Air Suspension
Thread Starter
|
Junior Member
Joined: Jun 2018
Posts: 2
2007 Rear Air Suspension
We have a 2007 H2, and the air suspension has gone bad. The dealer quoted over $4k to repair (bags and compressor). I have seen on this forum that there are OEM conversion kits for springs/shocks. According to the dealer there is no GM kit to do the same. We are considering this cheaper route. How many of you out there have done the same, and is there a specific brand of conversion kit that is preferable? The dealer also said that the check suspension light will always remain on after this, is there no way to turn that warning off? How much of a ride difference is it? Thanks in advance.
Senior Member
Joined: Jan 2017
Posts: 2,320
From: SC
Do a quick search on here. Tons of people have converted the rear to springs. My understanding is that it is not terribly hard to do and it can be done in a way that the service air suspension message will not come on either - although I guess it might if you hit that button on the dash or the rear compressor switch.
Senior Member
Joined: Feb 2015
Posts: 1,635
From: Birmingham (UK)
You may find this helpful.
My rear AS unit control module failed but I elected not to go for coil springs as I use the extra 2" ride-height when uncoupling my trailer.
The air-bags should be easy to replace (
) and I bought a complete AS unit 2nd hand for $350 dollars (it actually cost more to ship to the UK)
I think you will find the dealer is mistaken, unplugging the AS-Unit cable (under the truck at the rear ) and then disconnecting/reconnecting the battery will cause the BCU to re-configure itself for operation without an AS-Unit. I was forced into doing this after my Control Module failed, this is something you can easily try!
If you elect to fix your AS you will need the GM Part No. located on the Control Module to match your vehicle, watch out for GM's revised part numbers.
My rear AS unit control module failed but I elected not to go for coil springs as I use the extra 2" ride-height when uncoupling my trailer.
The air-bags should be easy to replace (
I think you will find the dealer is mistaken, unplugging the AS-Unit cable (under the truck at the rear ) and then disconnecting/reconnecting the battery will cause the BCU to re-configure itself for operation without an AS-Unit. I was forced into doing this after my Control Module failed, this is something you can easily try!
If you elect to fix your AS you will need the GM Part No. located on the Control Module to match your vehicle, watch out for GM's revised part numbers.
Junior Member
Joined: Jun 2010
Posts: 23
From: Las Vegas, NV
I am about to replace my air springs on my 2007 Hummer H2. I replaced them in 2012 and though they are not leaking, I have decided to change them out and also replace my air ride levelers on each side of the truck. When I changed out the air springs in 2012, I just jacked up the truck, let the bags hang, stuck the point of a razor knife in them to release the air pressure, removed and replaced the bags themselves.
I did not remove any other component, nor did I RESET any other component, I just changed out the bags and from 2012 to 2021, I have never had a problem with them, they always topped out when I pushed the button on the dash and always lowered to a standard ride height when lowered. They never sagged or dropped down below what I assume was factory road height level.
When and why would I have to change out the air suspension MODULE you show in the photo? The pump's still run, the only issue I am having at the moment is the red light on the dash will not lock ON and two weeks ago, I sprayed WD-40 and AIR SENSOR CLEANER on the wires of the ride levelers on the sides of each wheel well and strangely enough, that corrected the red light issue, but after two weeks, the light on the dash keeps flashing now and the air springs do not top out.
I believe I could just spray the ride leveler arms again, but... that's just not how I normally do things.
When something appears to be failing, I just replace it. Cost is less of an issue than inconvenience. I go places in my Hummer where if it breaks down... people die, so when something starts being undependable... I yank it off and put on a new component. Often, I put a backup component in an ammo can and take a spare with me, just in case.
I did not remove any other component, nor did I RESET any other component, I just changed out the bags and from 2012 to 2021, I have never had a problem with them, they always topped out when I pushed the button on the dash and always lowered to a standard ride height when lowered. They never sagged or dropped down below what I assume was factory road height level.
When and why would I have to change out the air suspension MODULE you show in the photo? The pump's still run, the only issue I am having at the moment is the red light on the dash will not lock ON and two weeks ago, I sprayed WD-40 and AIR SENSOR CLEANER on the wires of the ride levelers on the sides of each wheel well and strangely enough, that corrected the red light issue, but after two weeks, the light on the dash keeps flashing now and the air springs do not top out.
I believe I could just spray the ride leveler arms again, but... that's just not how I normally do things.
When something appears to be failing, I just replace it. Cost is less of an issue than inconvenience. I go places in my Hummer where if it breaks down... people die, so when something starts being undependable... I yank it off and put on a new component. Often, I put a backup component in an ammo can and take a spare with me, just in case.
Senior Member
Joined: Feb 2015
Posts: 1,635
From: Birmingham (UK)
My AS Module was only replaced because the original failed, yours should be fine.
Spraying WD-40 is not always a good thing as can introduces an oil barrier to the contacts (although many enthusiasts do) a good contact cleaner should suffice and is recommended.
Changing your air-springs may not help, however it seems you've identified the problem which is probably the ride-height sensors themselves OR their connectors.
If you have access to a Tech2 Scanner you could monitor the ride-height sensor values
For me I'd just replace the ride-height sensors (levellers) and make sure their connectors air clean and free from contamination, I've had both sensors fail in the past, they do get a lot of work. Note you may have to recalibrate the ride-height with a Tech2 after changing.
As I recall all doors must be closed before the extended ride-height function works, which I'm sure you know.
Good luck, and please keep us posted
Spraying WD-40 is not always a good thing as can introduces an oil barrier to the contacts (although many enthusiasts do) a good contact cleaner should suffice and is recommended.
Changing your air-springs may not help, however it seems you've identified the problem which is probably the ride-height sensors themselves OR their connectors.
If you have access to a Tech2 Scanner you could monitor the ride-height sensor values
For me I'd just replace the ride-height sensors (levellers) and make sure their connectors air clean and free from contamination, I've had both sensors fail in the past, they do get a lot of work. Note you may have to recalibrate the ride-height with a Tech2 after changing.
As I recall all doors must be closed before the extended ride-height function works, which I'm sure you know.
Good luck, and please keep us posted
Last edited by oceanbrave; Jan 4, 2021 at 04:53 PM.
Senior Member
Joined: Jul 2012
Posts: 9,012
From: C-Town
What's Inside WD-40? Superlube's Secret Sauce
The recipe for this superlube has long been a closely guarded trade secret. Wired sent a can to the lab and got the ingredients. Mineral Oil Seriously. WD-40 is mostly a mix of baby oil, Vaseline, and the goop inside homemade lava lamps.I prefer to clean&seal electrical contacts:
Thread
Thread Starter
Forum
Replies
Last Post
Random-Hero-
PRIVATE For Sale / Trade Classifieds
7
Apr 1, 2012 10:58 AM
chesh97
PRIVATE For Sale / Trade Classifieds
7
Mar 30, 2012 09:07 PM
dmachine007
PRIVATE For Sale / Trade Classifieds
4
Jan 16, 2010 09:02 PM