Service: Driver Assist System

CounterMeasure · June 3, 2016

My Denali is at the dealership right now for this, and also the steering column no longer telescoping down. The left haptic motor in the seat is dead due to a piss poor design that allows the wires at the pigtail on the motor to flex as the seat is compressed as you get in and out until they break. The right haptic wasn't far behind, so they replaced both since it requires removing the seat cover and so forth to change. The best part is there is no improved design part yet; so it will just happen again.

Cosmic Charlie · July 7, 2016

My SLT has 30,000 miles and has the BEEP even though it's set for vibrate regarding lane departure, and got the Message

Service: Driver Assist System

It just started when I moved the seat all the way forward to clean up the truck, I usually have the seat all the way back from day 1 ....

So the 1st time I moved the seat all the way forward some wire (?) got screwed up (?)

I looked under my seat and saw nothing pinched or jammed into the track

Doobs41378 · July 13, 2016

I just got this message as well. It is already going in today for something in the steering column so I will have them look at it.

Doobs41378 · July 13, 2016

Had mine replaced today. It's called a drivers seat "heptic motor malfunction" they replaced part # 84017512

Hope this helps some of you as mines been crazy acting for months.

This is what they said mine was too. Replacing it now.

CounterMeasure · July 13, 2016

This is what they said mine was too. Replacing it now.

Make sure they replace both!

If one failed (likely the left side one), the other is not far behind. Its a design flaw on the part that will cause wear on the wire pigtails.

LTZDaddy · July 15, 2016

Hi all,

First post... long time GM/GMC owner, (like since the 70's for me, 30's for my dad). Also have been a reader of the forum for years now, (with the 05 Envoy Denali being in the family). ;)

Don't mean to hijack here but I have a similar problem. We ordered the Costco Limited Edition Silverado LTZ back on May 27th, and took delivery a week ago (almost). Actually it was a few days late, came in July 8th. Can't say enough good things about the Costco program and just how easy it is, not to mention how much you save. OTOH... I'd NEVER have thought to go that route had I not happened by the Costco truck when building out GMC's and Chevy's online. Honestly I didn't need/want the sunroof or the "limited edition" 22" wheels as building the exact same truck (without those two options) was $2500 less. But after all the numbers were run, (not to mention the Costco $1000 cash card) the net-net wasn't but $500 more for a $2500 price difference... no brainer that one was. ;)

We chose Siren Red tint coat, in 4WD, cocoa/dune, which was an upcharge to the base price, albeit only at supplier pricing. Then I added another 2K in 'accessories' after the fact that were not included in the (unchangeable) Costco deal. Without my additions, it was a tick over 59, but ended up well under 51, and still have the $1000 Costco card coming. Win win there.

That however is the good news.

Being as it's not a daily driver we've not gone out in it much in the last week, just around here locally. Although I had concerns that the LKA and Collision Avoidance wasn't working, but attributed that to small twisty roads here in town, and a lack of any real stop and go traffic to test out the collision avoidance.

Yesterday however I made a 65 mile trek well north of Atlanta to my closest Hüper Optik dealer for ceramic 40 in the front doors, ceramic 70 in the back doors, back glass, and sunroof. It's AMAZING how cool it is now compared to before, with the 70 being almost clear, but blocking out all the IR.

On that trip I couldn't for the life of me get the Lane Keep Assist to turn on. No green icons, no amber, nothing, zip, nada. It's on of course on the console, and the collision avoidance is set to maximum in the DIC. I had my share of bumper to bumper traffic, brakes being slammed on in front, and never got a warning, EVER. Tried the LKA numerous times and nothing, not even the light in the DIC. The truck has something like 230 miles on it at this point.

So today I take it to the dealer and wait, and wait, annnnnnnd wait. Was there 5+ hours while they tried to figure out what was going on. At first the tech was thinking it wasn't LKA, but the warning of lane drift option and haptic seat he was chasing. Then they pulled the build sheet and FINALLY listened to what I was trying to tell them.

There was also a brand new High Country in for (what they said) was the same problem.

On mine, the tech said there was a power steering fault code (that he cleared) and thought he'd fixed it. (At that time he was still thinking it was only the bumper sensors though that he was trying to fix.) He said the High Country though had no fault codes and nothing with the steering. Go figure.....

I confirmed with him though that we're talking about the CAMERA that works with the Lane Keep Assist, not just the sensor warning/haptic seat and/or beeps.

At this point he said they couldn't fix it, "Because it's not acting up while it's on, so the system isn't telling us what is wrong". Then went on to say "If it was on, and not working correctly it'd show up in the system".

This was AFTER he had taken it for TWO TEST DRIVES!!!!!!

I was flabbergasted and said, "So you're telling me that because it ISN'T TELLING YOU what is wrong, that you're not going to fix it, because in your eyes it's working correctly? Even though you've driven it TWICE, and YOU KNOW it's turned on, and YOU KNOW it's not working!"

He said, "Yes, that's correct. We can't fix it because we don't know what it's not doing." Although admitted it WAS INDEED ON, just not 'acting' like anything is wrong with it.

To which my reply was. "So you're telling me I just bought a $60,000 truck with one of the biggest safety features on it that WASN'T FREE by the way, that doesn't work, doesn't tell you it's not working, and you DON'T KNOW how to fix it? Care to refund my money about now?

I mean what the heck?

Plus the left side of the seat hardly vibrates, but that's another matter.

And the wireless charger doesn't work with my brand new S7 edge. That is a hardware problem, period. (Theirs, not mine, and I don't know if there will EVER be a fix for that.) ;)

Ended up leaving the dealership after wasting most of the day there, (like from 8:00 till after 1:00). Service writer was at lunch (tech said he goes for 2 hours), Service Manager was at lunch too, (tech said he's slow when he's there). The tech did say all they could do was get with GM tech support and figure out what to do. It's obvious the system isn't working, and even more (painfully) obvious that they have NO freaking CLUE what to do.

Anyhow.... sorry about the hijack/drift. But found this thread, and noticed it was at least similar.

If anyone has had (or is) having the same problem I'd love to hear about it.

Thanks!

Doobs41378 · July 15, 2016

Hi all,

First post... long time GM/GMC owner, (like since the 70's for me, 30's for my dad). Also have been a reader of the forum for years now, (with the 05 Envoy Denali being in the family). ;)

Don't mean to hijack here but I have a similar problem. We ordered the Costco Limited Edition Silverado LTZ back on May 27th, and took delivery a week ago (almost). Actually it was a few days late, came in July 8th. Can't say enough good things about the Costco program and just how easy it is, not to mention how much you save. OTOH... I'd NEVER have thought to go that route had I not happened by the Costco truck when building out GMC's and Chevy's online. Honestly I didn't need/want the sunroof or the "limited edition" 22" wheels as building the exact same truck (without those two options) was $2500 less. But after all the numbers were run, (not to mention the Costco $1000 cash card) the net-net wasn't but $500 more for a $2500 price difference... no brainer that one was. ;)

We chose Siren Red tint coat, in 4WD, cocoa/dune, which was an upcharge to the base price, albeit only at supplier pricing. Then I added another 2K in 'accessories' after the fact that were not included in the (unchangeable) Costco deal. Without my additions, it was a tick over 59, but ended up well under 51, and still have the $1000 Costco card coming. Win win there.

That however is the good news.

Being as it's not a daily driver we've not gone out in it much in the last week, just around here locally. Although I had concerns that the LKA and Collision Avoidance wasn't working, but attributed that to small twisty roads here in town, and a lack of any real stop and go traffic to test out the collision avoidance.

Yesterday however I made a 65 mile trek well north of Atlanta to my closest Hüper Optik dealer for ceramic 40 in the front doors, ceramic 70 in the back doors, back glass, and sunroof. It's AMAZING how cool it is now compared to before, with the 70 being almost clear, but blocking out all the IR.

On that trip I couldn't for the life of me get the Lane Keep Assist to turn on. No green icons, no amber, nothing, zip, nada. It's on of course on the console, and the collision avoidance is set to maximum in the DIC. I had my share of bumper to bumper traffic, brakes being slammed on in front, and never got a warning, EVER. Tried the LKA numerous times and nothing, not even the light in the DIC. The truck has something like 230 miles on it at this point.

So today I take it to the dealer and wait, and wait, annnnnnnd wait. Was there 5+ hours while they tried to figure out what was going on. At first the tech was thinking it wasn't LKA, but the warning of lane drift option and haptic seat he was chasing. Then they pulled the build sheet and FINALLY listened to what I was trying to tell them.

There was also a brand new High Country in for (what they said) was the same problem.

On mine, the tech said there was a power steering fault code (that he cleared) and thought he'd fixed it. (At that time he was still thinking it was only the bumper sensors though that he was trying to fix.) He said the High Country though had no fault codes and nothing with the steering. Go figure.....

I confirmed with him though that we're talking about the CAMERA that works with the Lane Keep Assist, not just the sensor warning/haptic seat and/or beeps.

At this point he said they couldn't fix it, "Because it's not acting up while it's on, so the system isn't telling us what is wrong". Then went on to say "If it was on, and not working correctly it'd show up in the system".

This was AFTER he had taken it for TWO TEST DRIVES!!!!!!

I was flabbergasted and said, "So you're telling me that because it ISN'T TELLING YOU what is wrong, that you're not going to fix it, because in your eyes it's working correctly? Even though you've driven it TWICE, and YOU KNOW it's turned on, and YOU KNOW it's not working!"

He said, "Yes, that's correct. We can't fix it because we don't know what it's not doing." Although admitted it WAS INDEED ON, just not 'acting' like anything is wrong with it.

To which my reply was. "So you're telling me I just bought a $60,000 truck with one of the biggest safety features on it that WASN'T FREE by the way, that doesn't work, doesn't tell you it's not working, and you DON'T KNOW how to fix it? Care to refund my money about now?

I mean what the heck?

Plus the left side of the seat hardly vibrates, but that's another matter.

And the wireless charger doesn't work with my brand new S7 edge. That is a hardware problem, period. (Theirs, not mine, and I don't know if there will EVER be a fix for that.) ;)

Ended up leaving the dealership after wasting most of the day there, (like from 8:00 till after 1:00). Service writer was at lunch (tech said he goes for 2 hours), Service Manager was at lunch too, (tech said he's slow when he's there). The tech did say all they could do was get with GM tech support and figure out what to do. It's obvious the system isn't working, and even more (painfully) obvious that they have NO freaking CLUE what to do.

Anyhow.... sorry about the hijack/drift. But found this thread, and noticed it was at least similar.

If anyone has had (or is) having the same problem I'd love to hear about it.

Thanks!

Sorry to hear about your misfortune. I would start becoming familiar with the lemon laws in your state just in case. They are great trucks but when anything is mass produced there are bound to be a few that just aren't right from the get go.

LTZDaddy · July 15, 2016

Sorry to hear about your misfortune. I would start becoming familiar with the lemon laws in your state just in case. They are great trucks but when anything is mass produced there are bound to be a few that just aren't right from the get go.

Yes sir... familiar with those puppies. ;)

I I owned a flatbed towing business for almost 20 years and have been retired since 03 (at a very early age I might add) due to health reasons.

Back in those days (started in 85) you had to buy a Ford if you wanted something with diesel power (which I did for the first 10 years) and in 94 I bought one that was the worst vehicle ever produced by human hands.

From that point forward I went with GMC 6500's that were built over spec and underrated at 25995 pounds you could run those trucks 20 hours a day and hardly ever have any trouble out of them.... with absolutely marvelous CAT Power!

This thing just astounded me yesterday though because they were telling me "Well we can't fix it because it's not telling us it's broke but we know it's not working". I mean WTF!!! Somebody needs to grow a brain.

Sent from my SAMSUNG-SM-G935A using Tapatalk

GMCustomerService · July 15, 2016

Good afternoon,

We understand how having a difficult to diagnose concern can be frustrating, and apologize for any inconvenience this has caused you. We would be more than happy to reach out to your dealership on your behalf, to gather more information on this matter. In order for us to best assist you, please private message us with your VIN, full contact information, current mileage and dealership you have been working with.

Best,

Julianne M.

GM Customer Care

Yes sir... familiar with those puppies. ;)
I I owned a flatbed towing business for almost 20 years and have been retired since 03 (at a very early age I might add) due to health reasons.

Back in those days (started in 85) you had to buy a Ford if you wanted something with diesel power (which I did for the first 10 years) and in 94 I bought one that was the worst vehicle ever produced by human hands.

From that point forward I went with GMC 6500's that were built over spec and underrated at 25995 pounds you could run those trucks 20 hours a day and hardly ever have any trouble out of them.... with absolutely marvelous CAT Power!

This thing just astounded me yesterday though because they were telling me "Well we can't fix it because it's not telling us it's broke but we know it's not working". I mean WTF!!! Somebody needs to grow a brain.

Sent from my SAMSUNG-SM-G935A using Tapatalk

LTZDaddy · July 16, 2016

Good afternoon,

We understand how having a difficult to diagnose concern can be frustrating, and apologize for any inconvenience this has caused you. We would be more than happy to reach out to your dealership on your behalf, to gather more information on this matter. In order for us to best assist you, please private message us with your VIN, full contact information, current mileage and dealership you have been working with.

Best,

Julianne M.

GM Customer Care

Thanks for reaching out Julianne!

PM Sent your way.

As of today the service writer told me they still would not do anything because it did not say it was broken.

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LTZDaddy · July 24, 2016

So I get a couple of PM's from the nice people at GM Customer Support that have been monitoring the forum.

That's pretty good news I reckon.

Then last Thursday morning I get a message that says they've contacted my local service manager (Dennis) and he's going to be calling me to set up an appointment to bring my brand new LTZ in so that this Enhanced Driver Alert System might FINALLY start working like it's supposed to.

The thing is... I never received that call from the service manager Dennis.

I go to the dealership Friday afternoon and walk right up in front of him and he never spoke. I asked my service writer what's going on, I tell him that I've been in contact with GM customer support, I have a case number, they have spoken with Dennis, and HE was supposed to call me about fixing my truck.

He did not seem too have any clue what I was talking about re calling me and telling me that they were going to fix my truck!

That's when he told me that the other truck they had in there they THINK they've got fixed. (That truck was a pearl High Country that was in the shop for over a week.)

But that they were waiting to see how that truck worked out before they moved on to try to fix mine.

From what I'm being told... What they are trying at this point is a "logic reset".

Basically it means that they have to take all the components that are a part of the system and unplug them all.

Then reconnect them, one at a time, let them power up, and let the system start to recognize (and I assume initialize) each of the components. Supposedly this is going to fix it.

Considering how many components there are.... it sounds like it could be quite labor-intensive.

I mean we're talking about bumper sensors, the camera in the windshield, the electric power steering, braking sensor (deceleration), gas pedal sensor (acceleration), yaw sensors (to include front to rear tilt / side to side tilt / steering input angle), whether or not you have your turn signal on, speed sensor, the main computer, the secondary computer(s), and the list goes on.

Yet I ***still*** have no idea when they plan on actually FIXING IT. (Much less if they have a clue as to how it works.) [emoji37]

Actually I was looking today at some of the information in the DIC that it gets from the yaw sensor. If you tell the DIC to put a page up for off road then it will tell you if you're in 2WD or 4WD/AWD, as well as your front to rear tilt, your side to side tilt, and your steering input angle. It's pretty freaking cool to watch it work as you go down the road... Especially if you're going off road (or just driving through your backyard pulling a 1000 pound trailer full of furniture grade wood scraps for instance). LOL

Sent from my SAMSUNG-SM-G935A using Tapatalk

Cosmic Charlie · July 24, 2016

So I get a couple of PM's from the nice people at GM Customer Support that have been monitoring the forum.

That's pretty good news I reckon.

Then last Thursday morning I get a message that says they've contacted my local service manager (Dennis) and he's going to be calling me to set up an appointment to bring my brand new LTZ in so that this Enhanced Driver Alert System might FINALLY start working like it's supposed to.

The thing is... I never received that call from the service manager Dennis.

I go to the dealership Friday afternoon and walk right up in front of him and he never spoke. I asked my service writer what's going on, I tell him that I've been in contact with GM customer support, I have a case number, they have spoken with Dennis, and HE was supposed to call me about fixing my truck.

He did not seem too have any clue what I was talking about re calling me and telling me that they were going to fix my truck!

That's when he told me that the other truck they had in there they THINK they've got fixed. (That truck was a pearl High Country that was in the shop for over a week.)

But that they were waiting to see how that truck worked out before they moved on to try to fix mine.

From what I'm being told... What they are trying at this point is a "logic reset".

Basically it means that they have to take all the components that are a part of the system and unplug them all.

Then reconnect them, one at a time, let them power up, and let the system start to recognize (and I assume initialize) each of the components. Supposedly this is going to fix it.

Considering how many components there are.... it sounds like it could be quite labor-intensive.

I mean we're talking about bumper sensors, the camera in the windshield, the electric power steering, braking sensor (deceleration), gas pedal sensor (acceleration), yaw sensors (to include front to rear tilt / side to side tilt / steering input angle), whether or not you have your turn signal on, speed sensor, the main computer, the secondary computer(s), and the list goes on.

Yet I ***still*** have no idea when they plan on actually FIXING IT. (Much less if they have a clue as to how it works.) [emoji37]

Actually I was looking today at some of the information in the DIC that it gets from the yaw sensor. If you tell the DIC to put a page up for off road then it will tell you if you're in 2WD or 4WD/AWD, as well as your front to rear tilt, your side to side tilt, and your steering input angle. It's pretty freaking cool to watch it work as you go down the road... Especially if you're going off road (or just driving through your backyard pulling a 1000 pound trailer full of furniture grade wood scraps for instance). LOL

Sent from my SAMSUNG-SM-G935A using Tapatalk

too bad they don't just start with some GM prior found info like:

Had mine replaced today. It's called a drivers seat "heptic motor malfunction" they replaced part # 84017512

but that might just work too good ...

LTZDaddy · July 24, 2016

too bad they don't just start with some GM prior found info like:

Had mine replaced today. It's called a drivers seat "heptic motor malfunction" they replaced part # 84017512

but that might just work too good ...

And it might. ;)

Problem is.... This is the Lane Keep Assist that isn't working. As well as the Collision Avoidance warning in the DIC.

I get the haptic warnings when parking, THANK GOD. (Need those when positioning in the garage.) ;)

Albeit the intensity in the left side of the seat is CONSIDERABLY less than the right. Enough so to where I can't really tell it's on if the right side is already activated.

Guess we'll see what this week brings.

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Doobs41378 · July 24, 2016

I am not following here. I had all the same symptoms of you including the lane assist saying it needed service, then the left hand side of the seat stopped vibrating and started beeping instead. It was the Heptic Motor and it works great now. Have them start there.....

Cosmic Charlie · July 24, 2016

And it might. ;)

Problem is.... This is the Lane Keep Assist that isn't working. As well as the Collision Avoidance warning in the DIC.

I get the haptic warnings when parking, THANK GOD. (Need those when positioning in the garage.) ;)

Albeit the intensity in the left side of the seat is CONSIDERABLY less than the right. Enough so to where I can't really tell it's on if the right side is already activated.

Guess we'll see what this week brings.

Sent from my SAMSUNG-SM-G935A using Tapatalk