I know it sounds simple, but make SURE your battery is good.
Load test it ! Double check both battery grounds and positive cable
to starter & fuse block. If the cables are original they may be corroded
internally
The one note about the Detroit TrueTrac that I don't like is that you can't use
synthetic gear oil. The synthetic additive act like a "posi additive" and screw
it up. You have to use old fashioned 80-90w mineral gear oil without any additive.
I own 3 detroits in my ford aftermarket built...
That happened to me on my 2014 several years ago !!!
Went out for my test drive. No more suspension codes. Was just a bad shock
Rides much better. The 20" rims are better too. More rubber !!!
Thank you for that info. It's the electrical side of these sensors that I'm just
not that versed in (body junk)
I did stay up most of the night working on this 2013 REAR
Put new powerstop tow brakes/rotors/pads
The M'fr caliper bracket bolts were about welded into the rear though..
And no way...
As title states. Does anyone rebuild these (OE GM ones) ? Or pay as cores ??
These have gotten soooo expensive $$$$
And I absolutely don't want to get rid of the Z55 active suspension
Looks Good ! I'm actually taking off my 22" wheels that came on my 2013
denali and putting on the 20" wheels that were stock on my 2014 denali
Big difference with less sidewall on the 22's.. I'd think if you carry quite
a bit of weight (enough to need better springs) you would really hate...
Thank You
I found that in my search as well
I guess my question is : is this an electrical issue or an internal shock issue
It looks like it would NOT be the ride level sensor, that's a diff code
On my new to me 2013 Denali (purchased this way) I've got the C0590 service suspension
code. Right Rear Actuator issue.
Is this usually the actual shock? Z55 Air Suspension
Or the ride height sensor?
Or any advice/ Experience is appreciated
It take a while for the adaptives to learn... Sometimes up to 200 miles.
Best to change filter/fluid and then to an adaptive reset procedure OR with HPT
you can do a "clean/purge" procedure so the trans knows to RElearn the adaptives
due to a service
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