Jump to content

Wandering GPS screen

poodle guy
 Share

Recommended Posts

poodle guy New Member

poodle guy

Posted
Posted

I have a 2016 Denali HD that has a problem where the GPS screen wanders and will not lock in.  It comes and goes but I was able to get it into the dealer while it was happening.  The got some codes, I don't have the code numbers, that indicated low voltage at the fuse block. They also said there was a service bulletin out about it.  I searched for bulletins and don't see anything specific to the 2500 Denali. Not that I don't trust the dealer but ... The plan is to change out the fuse block ( $300.00+) and if that isn't the fix, replace the radio ($600.00+) Just wondering if there is anyone here that has had the same issue or some advice. 

carnau Enthusiast

carnau

Posted
Posted
On 6/5/2020 at 3:21 PM, poodle guy said:

I have a 2016 Denali HD that has a problem where the GPS screen wanders and will not lock in.  It comes and goes but I was able to get it into the dealer while it was happening.  The got some codes, I don't have the code numbers, that indicated low voltage at the fuse block. They also said there was a service bulletin out about it.  I searched for bulletins and don't see anything specific to the 2500 Denali. Not that I don't trust the dealer but ... The plan is to change out the fuse block ( $300.00+) and if that isn't the fix, replace the radio ($600.00+) Just wondering if there is anyone here that has had the same issue or some advice. 

Ok, So lets not just change parts. That's a mistake. I don't know why the dealer would even offer that. (I'm a dealer tech). I'm not putting something on your vehicle unless I am 100% sure it will fix it. If not, We will keep at it until we get it. 

 

I need to know this, Next time it wanders, the GPS sign on the radio. (should be in the corner) I need to know if it has a line through it or not.

 

The fuse block isn't going to cause your GPS to wander. The display could if the screen had an issue. (but the display/screen is not the radio. the radio is it's own component)

 

Mike Bizon New Member

Mike Bizon

Posted
Posted

Chris,  Thanks for the feedback.  This is actually the second time I’ve had issues.  The first time back in November, the GPS did have the red line across GPS in the corner.  That time they replaced the shark fin on the roof because water seeped in around the antenna.  That immediately fixed the problem.   That time it was only the GPS that went wonky.

 

 Now the GPS screen just wanders, I have a video but it’s too big to post.  

 

The other symptom is that when my iPod is attached, the car system switches back and forth between the Apple Car Play and the GMC Infotainment system.  The iPod is connected by the USB port.  It dosen’t matter which port and it doesn’t happen all the time.

 

Both GPS wandering and iPod issues happen at the same intermittent frequency.

 

The rational from the tech is that low voltage causes strange thing to happen down stream of the low voltage event. ( My words not his).

 

I do want to avoid the ‘just keep switching out parts until the money runs out or the issue is fixed method of troubleshooting “ 

 

Maybe I need to visit your shop?  I’m on the shores of Lake Murray visiting for a few days.

  • 2 weeks later...
Jamie Tousignant New Member

Jamie Tousignant

Posted
Posted

i have a 2017 denali with some of the same issues  the information screen will freeze up and nothing i do short of turning the truck 

off will reset it  so i cannot use any of the touch controls the steering wheel controls still work but that limits function 

I've tried the onstar button reset as noted but i guess I'm off to the local dealer for a diagnostic  ****** 

also CarPlay is totally intermittent   it seems like a ground issue or a voltage drop as the screen toggles back and forth  for the menu screen items  anyone else had this 

 

carnau Enthusiast

carnau

Posted
Posted
On 6/7/2020 at 9:27 AM, Mike Bizon said:

Chris,  Thanks for the feedback.  This is actually the second time I’ve had issues.  The first time back in November, the GPS did have the red line across GPS in the corner.  That time they replaced the shark fin on the roof because water seeped in around the antenna.  That immediately fixed the problem.   That time it was only the GPS that went wonky.

 

 Now the GPS screen just wanders, I have a video but it’s too big to post.  

 

The other symptom is that when my iPod is attached, the car system switches back and forth between the Apple Car Play and the GMC Infotainment system.  The iPod is connected by the USB port.  It dosen’t matter which port and it doesn’t happen all the time.

 

Both GPS wandering and iPod issues happen at the same intermittent frequency.

 

The rational from the tech is that low voltage causes strange thing to happen down stream of the low voltage event. ( My words not his).

 

I do want to avoid the ‘just keep switching out parts until the money runs out or the issue is fixed method of troubleshooting “ 

 

Maybe I need to visit your shop?  I’m on the shores of Lake Murray visiting for a few days.

I'm sorry. I wish you would have quoted me or @carnau me so I knew you responded. I would have been happy to look at it for you.

 

Even if the low voltage was causing an issue, it wouldn't be just with the things you see on the display. 

 

!!!Luckily!!! Friday I had a vehicle come in doing this exact same thing! I want to ask you a few questions please.

 

When it starts wandering, Do you hear a beep? Like the beep when you press the map and try to move it manually? Also, Do the steering wheel controls for the radio work while this is happening?

 

Sorry I missed your response. I don't check this site as much as I use to now that the adds have it so slowed down to a creeping hault tryind to load. I normally just check it when someone quotes me in something or every few days.

carnau Enthusiast

carnau

Posted
Posted
6 hours ago, Jamie Tousignant said:

i have a 2017 denali with some of the same issues  the information screen will freeze up and nothing i do short of turning the truck 

off will reset it  so i cannot use any of the touch controls the steering wheel controls still work but that limits function 

I've tried the onstar button reset as noted but i guess I'm off to the local dealer for a diagnostic  ****** 

also CarPlay is totally intermittent   it seems like a ground issue or a voltage drop as the screen toggles back and forth  for the menu screen items  anyone else had this 

 

7B063A03-B125-4F34-9EC2-D7EF8B31C9E8.mov

I can't hear anything on your video. Please read what I posted above and answer. Thank you.

Mike Bizon New Member

Mike Bizon

Posted
Posted
1 hour ago, carnau said:

I'm sorry. I wish you would have quoted me or @carnau me so I knew you responded. I would have been happy to look at it for you.

 

Even if the low voltage was causing an issue, it wouldn't be just with the things you see on the display. 

 

!!!Luckily!!! Friday I had a vehicle come in doing this exact same thing! I want to ask you a few questions please.

 

When it starts wandering, Do you hear a beep? Like the beep when you press the map and try to move it manually? Also, Do the steering wheel controls for the radio work while this is happening?

 

Sorry I missed your response. I don't check this site as much as I use to now that the adds have it so slowed down to a creeping hault tryind to load. I normally just check it when someone quotes me in something or every few days.

Hi and not problem about getting back to me.  This is the first time I’m on this site and posting.  

To answer you.  No beeping while the curser moves around the map.  I don’t specifically remember the steering wheel responses but I was pushing everything.  No beep when I try to recenter the map.

 

This is my tow vehicle and I was towing my trailer through North GA last week.  The beep you mentioned started but nothing was happening on the screen.  I was listening to my iPod. The beeping went on for a couple of minutes and then the GPS went to wandering.  That was a problem as I was depending on the GPS to get home.  I just turned everything off and when I came to the next rest stop, turned off the vehicle and came back everything worked just fine.

 

Thanks for even caring about this issue.

 

 

 

carnau Enthusiast

carnau

Posted
Posted
21 hours ago, Mike Bizon said:

Hi and not problem about getting back to me.  This is the first time I’m on this site and posting.  

To answer you.  No beeping while the curser moves around the map.  I don’t specifically remember the steering wheel responses but I was pushing everything.  No beep when I try to recenter the map.

 

This is my tow vehicle and I was towing my trailer through North GA last week.  The beep you mentioned started but nothing was happening on the screen.  I was listening to my iPod. The beeping went on for a couple of minutes and then the GPS went to wandering.  That was a problem as I was depending on the GPS to get home.  I just turned everything off and when I came to the next rest stop, turned off the vehicle and came back everything worked just fine.

 

Thanks for even caring about this issue.

 

 

 

No problem. The way it sounds is like you have a bad touch screen. That the screen is separating and when it does this, the GPS will wander and the stations will jump ect. 

 

Luckily this could be a really easy test if your dealer is willing to help you test it. The touch screen can be removed and installed from another like vehicle very easily. Test drive it with the other screen in it and see what happens. If it goes away, Reinstall the old screen in the other vehicle and the new one in yours. It's only four 7mm bolts holding it in and takes less than a minute to remove and install.

 

This is the way I would go with it.

  • 3 months later...
Mike Bizon New Member

Mike Bizon

Posted
Posted (edited)

carnau Did you ever get to look at the video ?  I believe it is the touchscreen. Would like your input and would come to where you work for the fix.  

 

Edited by Mike Bizon
  • 3 years later...
BarryT New Member

BarryT

Posted
Posted

My screen just started doing the same. I hear a faint beep and I see the system hunting through POI locations to navigate to. I pressed the "system" button and noticed that it "appeared" like I was continuously pressing the POI button (but I wasn't). Thinking that there was something stuck on my screen, I rubbed my finger back and forth across the POI button to try to clean off the screen and the wandering stopped. So maybe there is an issue with the screen itself.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing

  • Latest Articles

  • Posts

    • Atlas
      Wow I'm in a pickle. (Broke down truck) and a story.

      By Atlas · Posted

      Any joy with this truck seems to be short-lived.   The CEL for P0172 ("bank 1" too rich) is now "intermittent".   I'm not sure where to check, or re-check, and my energy to keep chasing problems with junk is wearing thin. The P0172 seems to set as I'm coming to a stop, completely off the throttle, when fully warm. At least, that's what it's done the 3? times it's set.   Everything appears normal on the scanner EXCEPT long term fuel trim. There's only one bank on this vehicle because it's an OBD 1.5 with only one upstream O2 sensor. At idle, it's around -16.4% and will dip to -18% occasionally at idle or off-throttle. LTFT approaches 0 when throttle is held at 2500rpm. Short term appears normal, much closer to zero all the time. The LTFT tells me the engine is running rich at idle but compensating at higher load. But, why?   The EVAP purge valve doesn't appear to be leaking/sucking fuel vapor continuously. Is it sticking just as I come to a stop and the engine is choking on fuel vapor and sets the P0172? But that doesn't explain the persistently negative LTFT. Disconnecting the purge valve doesn't seem to make any difference.   I suppose that leaves another dang issue with the fuel injector. A leaking fuel pressure regulator, a new leak in the spider, or a leaking fuel injector/poppet valve I didn't see, or a small crack in one of the spider legs.   The vacuum line leading to the fuel pressure regulator doesn't have raw fuel in it. It doesn't even smell like fuel when it's pulled off, not until you suck air through it, then you can tell it leads to a fuel component. I'd consider that normal? Nothing is signaling this is a FPR issue from the outside, at least.   The oil smells like fuel but it's not building volume. I've noticed most oil in most engines smells like fuel to some degree so it's hard to say if the smell is an issue or not. Or if the engine just still smells like fuel because the crankcase was full of it a few hundred miles ago. But it's been changed twice since that original issue of the leaking fuel line dumping fuel into the intake.   Patience is running very thin. Every win seems to be accompanied by two steps backwards, or another issue that leads to removing at least the top half of the intake manifold. Enough! LOL
    • Chuck FB
      Tire pressure for 37s

      By Chuck FB · Posted

      First off you mentioned "Toyo Says" and then gave the pressures 45/50, was this some person at the tire shop that pulled those numbers out of his head ?   Now of course I can't know your exact axle weights front and rear, however I have much the same pickup as yourself other than not knowing your starting weight as per the pounds the truck rolled out of the factory at due to the options yours did or didn't come with or what you have added beyond the extra tire weight. The correct way to know 100% where a person is at is by weighing each axle with the typical weight the vehicle is driven with and that means taking into account passengers and making sure you figure in a full tank of fuel and a little grace for whatever you may put in the bed "groceries" !    I am looking at and not that it really matters as all the tire companies use the same charts anyway, but I am looking at the comprehensive Toyo tire chart in the section that your tire falls under and I know it sounds confusing but your tire is not an LT metric tire like your factory tire but instead because its a standard inch measured tire its under a different category called an LT floatation series tire. That makes a difference as LT metric tires they don't want to see run below 35 psi at highway speed where as with the LT floatation series it can be run down to 25 psi on the highway as long as the weight on the said size of tire is agreeable with or less than that minimum 25 psi. It blows many people away that how is this physically possible, an empty truck for one thing and larger tires with the same size wheel diameter have a lot more air volume so they can carry the same weight as the smaller tire with less air pressure.    So my truck, I have the stock 275/65R20 wheels and tires and I have a bit of weight in the box with a bak flip cover and a rubber bed mat and some tools and spare gas. The front of my gas truck weighs a bit more than some trucks of the similar spec due to double batteries and alternators. However with full fuel and just me in the truck I am weighted such that I can run 40 front and 35 rear and so that is what I have done since day one.    If I base your truck at or slightly below the weight of my truck, in theory with your tires going by the tire chart you might be right around a minimum of 30 pounds front and 25 pounds rear. Of course that would hit pretty much minimum cold inflation pressure one could run with that tire size and a near empty truck. If you have access to an accurate weigh scale to do individual front and rear axle weights I would suggest you do that and make sure your topped up with fuel and whatever else in the truck before you weigh it and then you will have a great starting point to work off of and figure out what your bare minimum pressures are you can safely run. If you do much in the way of hot weather high speed driving, bumping up a bit for a safety margin is never a bad idea but just depends on what type of driving you do. I will include the Toyo chart and the floatation series sizes start on page 31. Without a doubt at these pressures I am speculating at minimum wise for your truck, it would most certainly ride very different then it did when you were using 55 lb front and rear.     https://www.toyotires.com/media/pxcjubjs/application_of_load_inflation_tables_20200723.pdf
    • Snowcamo
      Possible lifter tick after DOD delete

      By Snowcamo · Posted

      Take an automotive stethoscope to the vacuum pump. Iirc those tick as well. 
    • rdonarski
      Towing In Loose Gravel

      By rdonarski · Posted

      This landing is worse than most. Patchy blacktop with washouts, soft gravel/sand at bottom that washes out with every heavy rain. I tell everyone to put it in 4WD. A lot of them think they can pull out their trailer in 2WD. They end up digging a hole and then putting it in 4WD.  The lake is a pristine lake and has a lot of money on it. There are several wake boats and lot of large tritoons. The people with the money don't want it improved because they don't want more traffic.    Boat Landing 1.jfif Boat Landing 2.jfif Boat Landing 3.jfif
    • PBNB
      Tire pressure for 37s

      By PBNB · Posted

      How wide are your rims?   Toyo specs 8.5-10.0-11.0 inches. My thought would be rim might be pulling the tire inwards creating a center that is more pronounced.    I also noticed that the spec sheet says max 65psi. So you could be right lowering the pressure to ~40 psi. 

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...