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Old 06-08-2013, 12:00 PM   #239
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This is making me wonder about the efficiency of the stability control system. If the automatic cars don't have the pitch control, then how does the stability control handle the car facing up or down on winding and hilly roads? Shouldn't the entire relative position of the car be taken into account and not just the yaw? The MT cars probably don't do any better if the pitch sensor is only for HSA.
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Old 06-08-2013, 01:51 PM   #240
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Originally Posted by SSRS1LE View Post
Part number 13578326 on the right is the new sensor which lacks the longitudinal-accelerometer that triggers HSA.
Get 'em ordered quick, I think there could be a waiting list soon. Good work!
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Old 06-08-2013, 08:44 PM   #241
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This is making me wonder about the efficiency of the stability control system. If the automatic cars don't have the pitch control, then how does the stability control handle the car facing up or down on winding and hilly roads? Shouldn't the entire relative position of the car be taken into account and not just the yaw? The MT cars probably don't do any better if the pitch sensor is only for HSA.
Pitch has little to no impact on stability control. Stability controls job is to control lateral movement. Assuming all four tires are on the ground, the system can monitor slides based on wheel speed, steering angle and yaw. The pitch sensor, if tied to anything beyond HSA, would probably get in the way on hard acceleration. Hard acceleration on a slight incline would make the car think its flipping backwards. Can you imagine ST trying to fix that. Lol


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It's a Dingledarm. It's there to dampen side fumbling. If your marzelvanes fumble too much they can cause total protonic reversal. It gets ugly from there. This is really the biggest problem with the new Camaro. That and the tri-pronged blivot.

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Old 06-08-2013, 08:54 PM   #242
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Install took about an hour. Getting the center console apart is a little bit of a pain. There's a good thread that has a lot of pictures on how to get the console apart for a different mod. I used that as a guide for disassembly: http://www.camaro5.com/forums/showthread.php?t=77662

Once I had it disassembled, the Yaw-Sensor was bolted to the floor to the left of the hand-brake. I just removed and replaced.

As for truly knowing it only affects HSA, I suppose more time and data will be needed. From my observations, that the car starts with no warning lights or error messages (unlike the fuse-pull method I tried before). Hill Assist message never appears, and HSA never activates. Traction Control still kicks in under aggressive throttle, and ABS still works.

Thoroughly testing Stabilitrak would require somewhere other than the street I think. Maybe one of the track-regulars could give it a go, and post their findings.

Oh, and OzzySS, I'm still curious about the method you used to defeat HSA along with other electronic nannies as well.
You are the man!!! What a great fix. You even used factory parts. I love this.

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Old 06-08-2013, 11:17 PM   #243
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It worked! I installed the yaw-sensor used in automatic Camaros this evening, and have successfully banished the Hill-Nanny. Everything else works as normal.

Part number 13578326 on the right is the new sensor which lacks the longitudinal-accelerometer that triggers HSA.

Now Hill-Nanny can go live with Skip-Shift Nanny in exile.

Great work! I will be adding this part to my wish list! This is much easier than my thoughts about modifying the data stream on the fly.
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Old 06-09-2013, 02:13 AM   #244
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Okay now I'm really intrigued. lol

I have posted a DIY article for the sensor replacement here:

DIY: Disable 2013 HSA (Hill Start Assist)



Lol...I accidentally hit it with my drill while I was installing my cupholder delete switchplate from emblempros...I'm sure you saw that the sensor is pretty much right underneath the bottom of the cupholder...oops.

So you were able to just do a direct swap? No codes being thrown or taking it to be flashed?
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Old 06-09-2013, 06:40 AM   #245
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I've already looked at a couple vendors that have them in stock. Says it's for a 10-12 Camaro, works for me I'm gonna give it a shot!!

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Old 06-09-2013, 07:31 AM   #246
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Lol...I accidentally hit it with my drill while I was installing my cupholder delete switchplate from emblempros...I'm sure you saw that the sensor is pretty much right underneath the bottom of the cupholder...oops.

So you were able to just do a direct swap? No codes being thrown or taking it to be flashed?
That's correct. Direct swap, and the car started with no warning lights or messages.

I'm assuming the "drill" method resulted in ASR and TC lights, plus "Service Stabilitrak" message?
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Old 06-09-2013, 05:47 PM   #247
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That's correct. Direct swap, and the car started with no warning lights or messages.

I'm assuming the "drill" method resulted in ASR and TC lights, plus "Service Stabilitrak" message?
Haha, yeah...no nannies, no HSA, and the message when I start her up. Unfortunately I went ahead and ordered an identical replacement right after I figured it what I damaged. Considered the auto one, but figured I'd have to get the computer flashed if I went that route and didn't want to pay the dealer...
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Old 06-09-2013, 07:34 PM   #248
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Originally Posted by SSRS1LE View Post
It worked! I installed the yaw-sensor used in automatic Camaros this evening, and have successfully banished the Hill-Nanny. Everything else works as normal.

Part number 13578326 on the right is the new sensor which lacks the longitudinal-accelerometer that triggers HSA.

Now Hill-Nanny can go live with Skip-Shift Nanny in exile.

Dude! You Are a Genius! That is freaking brilliant!! I GOTTA get me one of these!!! Thanks!!
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Old 06-09-2013, 07:56 PM   #249
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I'm calling my dealer tomorrow. Anyone got a good pic of where this thing in located in the console?
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Old 06-09-2013, 08:34 PM   #250
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Wrong part number...even though they showed on their site that it cross referenced to 13578326, it is not the same

Last edited by BadAndy; 06-15-2013 at 03:34 PM.
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Old 06-09-2013, 09:54 PM   #251
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I'm calling my dealer tomorrow. Anyone got a good pic of where this thing in located in the console?
Here's the pic from the DIY article I wrote on the install. You can view the whole article from the link in my sig:

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Old 06-09-2013, 11:18 PM   #252
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Not the same part #. Do you think it is the same as part # 13578326?
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