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Author Topic: FRONT AIR BAG SENSORS NOT WORKING  (Read 14712 times)
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arneycl
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« on: 01/07/12 01:27 PM »

I have a 2005 Avalanche with 88,000 miles on it. About 4 months ago the Air Bag light came on as well as getting the Service Air Bag message on the dash. I finally took it to the dealer and they called stating that both front end sensors were not working and to replace it would cost right at $600. Also, my driver side power window isn't working and they said the module/switch was bad and it would cost $200 to fix it. I told them to go ahead and fix the power window but would let them know Monday on whether or not I wanted them to fix the sensors. They did tell me that the air bags would not deploy if in an accident.

I know I should probably get the sensors fixed but I thought I had read on here somewhere that some folks were having problems when they got the sensors fixed they quit working again months later. So I'm looking for advice/suggestions/answers. Would it be cheaper to fix them myself? Is it possible for one to fix the sensors yourself? Appreciate any info.

Thanks!!!
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MS03 2500
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« Reply #1 on: 01/07/12 02:27 PM »

It's not that hard to replace the front sensors, but you have to disarm the SIR system first.
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arneycl
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« Reply #2 on: 01/07/12 02:30 PM »

What and how do you disarm the SIR system? How much are the sensors?
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MS03 2500
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« Reply #3 on: 01/07/12 02:57 PM »

Not sure what dealer cost are, but from the parts store 25 bucks.

However I think they are replacing the Inflatable Restraint Sensing and Diagnostic Module (SDM)\

It seems a little strange that they both went out.


PS unless you tapped something or someone tapped you.
« Last Edit: 01/07/12 03:06 PM by MS03 2500 » Logged

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ItsStopher
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« Reply #4 on: 01/07/12 07:30 PM »

SIR Warnings & Service Procedures
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arneycl
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« Reply #5 on: 01/09/12 06:25 PM »

I really think my dealership has screwed me but I really hope I'm wrong. I just picked up my Avalanche after having them fix the driver power window. The guy on the phone told me Friday that it would cost me $200 to fix. However, the total bill was $500. For $500 I got the driver power window fixed which they said was the driver door module. Should it really cost that much money to fix the power window? Here is what the bill said:

Driver Side Power Window Inoperable:
Diagnosed/Replaced Driver Door Module and Retested System
77  CT   $175.16 (Labor)
10370149   SENSOR    $256.72 (Parts)

As for the air bag issue.....it says "checked codes and data....B0100 and B0103 stored in SDM. Checked wiring and front end sensors. Need both front discriminating sensors replaced. Taking the Avalanche to a local shop Thursday to see what they say and how much it will cost to fix.
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bajajohn
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« Reply #6 on: 02/07/12 01:23 PM »

Just had same problem with my 2005 avy. Code B0103 was left front sensor bad. Cost was 275 to fix out the door at dealer. Just an FYI.
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HOGRIDER
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« Reply #7 on: 04/05/12 06:58 PM »

Just had a tech scan my '05 which showed Left Front Sensor bad.  Switched sensors, cleared codes, and then it showed up as right front sensor bad.

Have another good friend with a salvage yard that found an updated GM #10370149 off an '07 Silverado (my original had the old #15103522).  Followed the procedures here for disabling the SIR, replaced the right front sensor, and now have no warning light and Service Air Bag is gone from the display.

Appreciate all the great info in this thread!  Saved a bunch of money using the part from salvage vs. ~$116.00 for a new one from Dealer.  One of the online GM Parts sellers did offer new #10370149 for ~$84.00 plus shipping.

 Thumbs up!
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Pinkie
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« Reply #8 on: 04/05/12 07:32 PM »

I've been debating taking mine in but it will come on then disappear for months at a time. Figured it was a sensor issue. How easy/hard is it to do yourself?
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MS03 2500
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« Reply #9 on: 04/05/12 10:50 PM »

That is the way to do it, get it scanned so you know which one is bad then replace it yourself.
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HOGRIDER
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« Reply #10 on: 04/06/12 11:18 AM »

I've been debating taking mine in but it will come on then disappear for months at a time. Figured it was a sensor issue. How easy/hard is it to do yourself?

Once I knew which one was the culprit, it was a matter of sliding under the front of the vehicle (in park, of course, with emerg brake set), using a 15mm socket to remove the shield, disconnect the electrical from sensor, then a 10mm wrench to remove the sensor.

I removed the SIR Fuse AND disconnected the battery just to be on the safe side.

 Cheers!
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HOGRIDER
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« Reply #11 on: 04/06/12 11:25 AM »

That is the way to do it, get it scanned so you know which one is bad then replace it yourself.

Now that I've done one, agree 100%!

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« Reply #12 on: 04/24/12 07:11 AM »

Hogrider,
  Thanks! Sounds easy enough, looks like I'll be adding this to my To Do list!
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HOGRIDER
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« Reply #13 on: 04/26/12 05:06 PM »

Glad to help!

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« Reply #14 on: 05/30/12 09:08 PM »

My 05 Av has had the airbag light on for quite a while.  Codes are b0100 and b0103 which I think are both front sensors.  So I'll be taking care of this.  I've been told that if the service air bag light is on the air bag system is totally disabled and they won't deploy in any kind of accident.  Make me wonder if they don't deploy if OnStar would be notified in the even of an accident?
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05 Z71, leather, power all, sunroof, DVD, NAV, XM, cladded, bermuda blue.  No highs or lows, must be Bose...I've got that too.
States visited- MI, IN, OH, KY, TN, AL, GA, IL, MO, KS, IA, NE, WY, UT, AZ, NV, ID, MT, CA, CO.

ItsStopher
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« Reply #15 on: 06/02/12 05:39 PM »

DTC B0100 Electronic Front End Sensor 1 Performance
DTC B0103 Electronic Front End Sensor 2 Performance

DTC B0100 and B0103 will set when one of the following conditions occur:

-A valid ID message is not received within 5 seconds of the front end sensor being powered up.
-Status message is not received.
-The SDM has failed twice to reset the front end sensor.


The following can cause an intermittent condition:

-A short between the front end sensor signal and low reference circuits
-High or low resistance in the front end sensor signal and low reference circuits
-Inspect the front end sensor signal and low reference circuits carefully for cutting and/or chafing
Verify that the correct front end sensor is installed in the vehicle
 
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jsg35
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« Reply #16 on: 06/17/12 08:59 AM »

Does anyone know if P/N 25794815 off of an '09 Avalanche could be used as a suitable replacement for P/N 10370149 off of an '05 Avalanche?

Also are P/N 10370149 and 15103522 interchangeable?

Thanks for all the great information and God Bless everyone on this website for all their help.

Happy Father's Day!!!
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There is no such thing as a long trip (when you're driving an AV)!
ItsStopher
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« Reply #17 on: 06/17/12 11:48 AM »

Because of the different part numbers I would say no...

Old Part Number   25794815
New Part Number  20926379
Part Name FRONT SENSOR Silverado, Sierra; All

Part Number   10370149
Part Name  Ft impact sensor

Old Part Number   15103522
New Part Number  10370149
Part Name  Ft impact sensor
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