GMT900 Factory SUV Suspension Options

[George B]

Suspicions confirmed! 0 to 5 volts

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The voltage reading is for the position sensors not the actuators or am I reading that wrong?

 

[PatDTN]

I don't know anything about the lowering kits but wondering about the sensors. Is there a change to those to keep them from telling the computer that your suspension is now compressed significantly? If the sensors aren't adjusted for maybe it thinks you're heavily loaded and the shocks need to be stiffer to control the excess weight it thinks is there?

 

[George B]

I don't know anything about the lowering kits but wondering about the sensors. Is there a change to those to keep them from telling the computer that your suspension is now compressed significantly? If the sensors aren't adjusted for maybe it thinks you're heavily loaded and the shocks need to be stiffer to control the excess weight it thinks is there?

Yes, there are kits with shorter rods but folks on here just use 1/4-20 threaded rod cut to the right length and thread it into the plastic ends of the original rods.

 

[PatDTN]

Yes, there are kits with shorter rods but folks on here just use 1/4-20 threaded rod cut to the right length and thread it into the plastic ends of the original rods.

I would guess, having had one broken open on my '09 LTZ, that the sensors are just potentiometers. What are baseline readings for those at stock height and again after lowering?

 

[George B]

I would guess, having had one broken open on my '09 LTZ, that the sensors are just potentiometers. What are baseline readings for those at stock height and again after lowering?

Most guys make a note of the arm location and match it after lowering. Some of us have Tech2 scanners and can look at the baseline reading and then match it. I don’t recall the baseline on mine.
I am not lowered, I am just repeating what I know about doing it.

 

[avalonandl]

I. Have z55 and 6xa 7xa on the vin tag. Tough finding struts

 

[iamdub]

The voltage reading is for the position sensors not the actuators or am I reading that wrong?

Hmmm. I was reading "Damper Actuator Command" and assumed that meant the commanded valving in the shock (damper).

 

[iamdub]

I don't know anything about the lowering kits but wondering about the sensors. Is there a change to those to keep them from telling the computer that your suspension is now compressed significantly? If the sensors aren't adjusted for maybe it thinks you're heavily loaded and the shocks need to be stiffer to control the excess weight it thinks is there?

Mine were overly stiff when at stock height and super soft when unplugged. Before I lowered it, I very accurately marked the positions of the sensors and made shorter links to put the sensors at those marks after I lowered it. The AutoRide shocks and struts were removed for the lowering, so marking the sensors might not have had any point. But, I didn't want the system constantly trying to send voltage to shocks that didn't exist. Of course, no voltage can flow if the circuit it open. But, I'm still planning on reimplementing the Auto Level Control so I gotta keep the sensors in place and properly functioning. For now, it's all happily bypassed with resistors.

 

[gooffeyguy]

Instead of changing rod lengths when raising or lowering the front, could you just do a "zeroing/calibration" or whatever it's called, with the Tech2?

 

[iamdub]

I would guess, having had one broken open on my '09 LTZ, that the sensors are just potentiometers. What are baseline readings for those at stock height and again after lowering?

Apparently, like most every other sensor on these things, they operate on a 0 - 5 volt scale. No idea where in that scale they read when at rest on a stock vehicle. I'm sure it varies. But, you can relearn each sensor to make its current position its new "zero/baseline" point, like a "tare".