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Old 06-08-2013, 07:25 AM   #1
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DIY: Disable 2013 HSA (Hill Start Assist)

Like many of the 2013 manual-transmission owners, I have found HSA to be a nuisance that interferes with the smooth operation of the vehicle. Unlike Hill-Assist implementations in other cars, which can be turned on or off, there is no way to disable this feature on the Camaro without modification to the vehicle.

My method of disabling HSA, was to replace the Yaw-Sensor, with the part number used for the Automatic Camaros. This sensor does not have the longitudinal-accelerometer that triggers HSA. After installation, the car had no warning lights or warning messages. HSA no longer activates, nor does the Hill Start message ever appear.

Special thanks to MPHS_AGM for some key-info on HSA functionality, and to OzzySS for specifics on the sensor location. Also thanks to jtzako for his guide on PDIM + USB Port installation, as I followed this guide for center console disassembly.


Disclaimer: As with all modifications and DIY articles, perform any modifications to your car at your own risk. The author assumes no responsibility for your actions.


Parts Used

GM Part# 13578326 - Yaw Sensor without Longitudinal Accelerometer




Tools Used

  • 7mm Socket
  • 10mm Socket
  • Phillips Screwdriver
  • Small Flathead Screwdriver


Step 1 - Remove the center Console

As mentioned, I followed jtzako's excellent guide for removing the center console. http://www.camaro5.com/forums/showthread.php?t=77662
Removal is the same for manual-equipped Camaros.

Step 2 - Remove and Replace the Yaw-Sensor


Once the console is removed, the yaw-sensor can be located to the left of the emergency-brake. Simply remove and replace this unit with GM Part# 13578326 using a 10mm socket.



Put everything back together, and you're done. No more Hill-Nanny!
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Old 06-08-2013, 08:22 AM   #2
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Thank you very much!

Would like to hear if you notice any onther changes. I hope GM takes notice of what owners are willing to do to disable HSA, and retrofitsa software change allowing the disabling of this feature.
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Old 06-08-2013, 09:01 AM   #3
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I think you are about to make many people very happy!
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Old 06-08-2013, 09:37 AM   #4
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Stabilitrak still work?

This is genius if it still does.
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Old 06-08-2013, 10:13 AM   #5
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Quote:
Originally Posted by racerx1214 View Post
Stabilitrak still work?
.
Good question. If the orientation of the sensor still includes the "yaw" aspect of the three directional movements (pitch, roll, yaw), then I'd think all is well. The notation of it not having longitudinal sensor indicates the "pitch" movement is absent which would correlate to the concept of the nose facing up or down a hill. Therefore, the stabilitrack function, which I think is principally a yaw motion protection, should be ok. Someone with the mod should find a big wide open parking lot on a wet day and try to drift the back end to see if the stabilitrack control kicks in.

Me, I'm keeping the HSA as it seems to work perfectly for me on all the hills around Austin...
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Old 06-08-2013, 04:57 PM   #6
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Quote:
Originally Posted by racerx1214 View Post
Stabilitrak still work?

This is genius if it still does.
It works in an automatic car. I would expect it to work in this case since it's just replacing the M6 yaw sensor with one from an A6,
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Old 06-08-2013, 05:41 PM   #7
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Nice work.

The fact that this has to be done while other manufacturers let you disable it is stupid.
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Old 06-08-2013, 07:08 PM   #8
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Kewl

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Old 06-08-2013, 11:26 PM   #9
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you the man!
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Old 06-09-2013, 12:14 AM   #10
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Thanks for the props! I have been off the boards for a while and glad to see that there was some progress made on disabling HSA. Do you know if the automatic sensor needs to be calibrated? There is a section in the manual about calibrating the yaw sensor and I can't recall if it was only for the HSA function. I will reread the sections and see what I can come up with. Keep us posted on any changes to the traction control system.
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Old 06-09-2013, 12:20 AM   #11
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Instead of an automatic YAW sensor, can someone use one from a 2010-2012 Manual? Or is the part number/sensor the same?
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Old 06-09-2013, 05:38 AM   #12
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Looks like the 10-12 are the same as the OP mentioned automatic version.

http://www.gmpartsclub.com/oem-part/...ensor/13578326
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Old 06-09-2013, 07:39 PM   #13
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Awesome!! I've been working around/living with the HSA for a while now but it's nice to see someone did the homework to find a fix! Although it is sad that this has to be done instead of just disabling it. As long as no one has any glaring issues I'll be doing this myself. Thanks for the write-up!!
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Old 06-10-2013, 01:40 AM   #14
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The part will be on backorder soon!

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Old 06-10-2013, 02:48 PM   #15
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a questions i have for this, is there separate calibrations for these? Is it all the same for v6 ss, zl1? how does this interface with the cars safety systems. it appears that the hsa was added as software if the earlier ones didn't have it and the part numbers are the same. hopefully and i am going to assume there is a model specific calibration as i would assume the zl1 auto would be the best to have or assuming this feature will be left off of the z/28 one of those
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Old 06-12-2013, 07:58 PM   #16
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The part will be on backorder soon!

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Cheapest place I found the part (new) is gmpartsdirect. $80 shipped. Thanks to all who fixed this effing fiasco.
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Old 06-13-2013, 12:59 AM   #17
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Ordered mine
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Old 06-14-2013, 10:55 AM   #18
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Interesting. I wonder if this affects how the airbags are activated?
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Old 06-14-2013, 01:09 PM   #19
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Interesting. I wonder if this affects how the airbags are activated?
No effect. Airbags function off impact-sensors mounted behind the front bumper.

Also remember this is a factory GM part, same as 2013 auto Camaro, and 2010-2012 manual and auto Camaros. It will provide the all the same features and functionality as it does in those applications.
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Old 06-14-2013, 05:55 PM   #20
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Quote:
Originally Posted by SSRS1LE View Post
No effect. Airbags function off impact-sensors mounted behind the front bumper.

Also remember this is a factory GM part, same as 2013 auto Camaro, and 2010-2012 manual and auto Camaros. It will provide the all the same features and functionality as it does in those applications.
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Old 06-22-2013, 06:28 AM   #21
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Changed mine out last night.... Works like a charm!!!!!! Ding Dong the HSA is DEAD! add that to my already installed "skip Shift Eliminator" and...no more nannies!! WoooHooo!!! I'm a happy camper, I can now drive my standard like it should be!!

Thanks OP for this awesome fix!!!
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Old 06-22-2013, 12:08 PM   #22
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Finished mine just now and I'm much happier!!

Only thing that's a pain in the ass is the two rear screws that hold down the back of the console. Barely got them out but now I'm going to Harbor Freight to get this: http://www.harborfreight.com/8-piece...ver-92630.html so I can reinstall them tight.
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Old 06-23-2013, 11:11 AM   #23
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I might have to try this. The biggest problem I have with HSA is being inconsistent when it activates. Most of the time I have my wheel turned so I can't see the indicator in the gauges that it activated. I never had an issue stalling as I'm responsive enough to feel the brakes being applied before RPMs dropping.

Can't tell if the inconsistency is because of the way I drive or the car itself. I don't always come to a complete stop, and I believe that is required for it to activate.
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Old 06-23-2013, 04:27 PM   #24
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Is there any reason why I shouldn't buy a used one? Am I off base?
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Old 06-24-2013, 11:48 PM   #25
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Holy tits I just found this thread. Yea buddy!
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