Jump to content

Fuel Gauge pegged at full

Chaser777
 Share

Recommended Posts

Chaser777 Enthusiast

Chaser777

Posted
Posted

Just picked up a new at4 2500 GMC.  Put a little over 75 miles on it and noticed the fuel gauge is still at complete full.  The range mileage has come down, but the gauge has not moved. I noticed when I turn the vehicle off, the little vertical white bar stays at the full level, but that bar slides fully to the left on the other gauges such as engine temp, volts, etc. When I turn the vehicle on, those little white indicator bars slide from all the way left, to current readings, where the fuel gauge is already pegged to the far right.  This AM I stopped to put fuel in just to see where it was at and it took 7 gallons.  Seems odd that the miles to empty seems to be reading correctly, but gauge is pegged at full?

 

Also, the right turn signal doesn't automatically turn off about every fifth time I use it. I have to manually turn it off.  It also seems very hard to turn the blinker lights on compared to my previous ride, 2018 GMC HD Denali.

BuckWallace Enthusiast

BuckWallace

Posted
Posted

I'd give it some more time/miles and see if the fuel gauge moves at all. As for the blinkers, my turn signal lever on my 2024 has always been very hard to turn on and off. Turning off a right signal was especially difficult, so I had the dealer look at it and they agreed. They replaced the lever and now turning off a left signal is difficult... Not sure if it's the lever or something in the steering column.

Chaser777 Enthusiast

Chaser777

Posted
  • Author
Posted

thanks for the reply. I'll give it more time.  See what happens.  I also noticed the shifter lever for going into gear seems very stiff.  Have to pull pretty hard to get it into gear. Not a big deal, but so much different than previous GMC truck.  Love the truck so far. For a 3/4 ton, ride isn't too bad and I have a snow plow/camper prep package on it too.

  • Like 1
revrnd Senior Enthusiast

revrnd

Posted
Posted

I have a 2024 with 4500 miles on it. No issues that you speak of. In fact I've noticed the turn signal 'cancels' w/ a reduced turn. In the past turning into my village on a slight curve I'd always forget to turn off the turn signal and it would continue to flash. W/ this truck, when I correct the wheel, the turn signal turns off.

bruceb58 Enthusiast

bruceb58

Posted
Posted

What does the MyGMCApp say what is has in percentage? It will have a number that is actually read from the sensor and displayed as a number.

Chaser777 Enthusiast

Chaser777

Posted
  • Author
Posted

So as far as the gas gauge goes, it finally did move off of Full. Seems to be working. I can’t get the GMC app to work to read percentage. Been on the phone with onstar 3 different times, plus the half hour initially spent at the dealer trying to unsuccessfully activate it when i picked the truck up. Last call with onstar they said i should make an appointment with the dealer as they now couldn’t even locate my truck via GPS. Suspect a hardware issue. Used the GMC app with my 2018 Denali and it worked flawlessly. Really enjoyed it.  
The right blinker problem continues. Made four consecutive right turns going around the neighborhood and it wouldn’t automatically click off for any of those turns. If I turn the wheel back and forth a couple times after the turn, it would then click off. Always works normally when using the left blinker. It doesn’t seem like it takes any extra force to turn right blinker on versus left blinker. I tried to just leave it blinking after the right hand turn to see if it would eventually turn off but went over a block and it still didn’t click off.  Im just going to keep an eye on it and hope it gets better. Can’t see taking it back for this minor issue, but will let them know about it next week. Loving everything else about the truck so far. 

  • 4 weeks later...
rtreptow7 Enthusiast

rtreptow7

Posted
Posted

Finally got a chance to take it in for blinker. Tech said switch wasn’t installed correctly at the factory. Seems to be working now. 

  • Like 1
  • 4 weeks later...
Chaser777 Enthusiast

Chaser777

Posted
  • Author
Posted

FYI=rtreptow7 is me too. 

Blinker problem is not resolved.  It started acting up just a day after it was fixed.  Same thing, right blinker wouldn't cancel. Took it back.  They said their is a TSB for this issue stating switch needs to be removed and reinstalled.  So they basically did the same thing and said that it may fail again and there may be a more robust switch mount available at a later date When\if GM issues a better fix.  Said something changed from 2024's to 2025's with the way it mounts.  

  • 4 weeks later...
Chaser777 Enthusiast

Chaser777

Posted
  • Author
Posted

Still an issue.  Failed within a day after the second attempt to fix.  Took it back a third time and they replaced the switch, Bracket, and steering wheel airbag coil.  On the way home from the shop, right blinker failed to cancel again. Not sure what else is left to fix/replace?  I can't be the only one having this issue. Not a hig issue, but sure is getting annoying.

newdude Senior Enthusiast

newdude

Posted
Posted
24 minutes ago, Chaser777 said:

Still an issue.  Failed within a day after the second attempt to fix.  Took it back a third time and they replaced the switch, Bracket, and steering wheel airbag coil.  On the way home from the shop, right blinker failed to cancel again. Not sure what else is left to fix/replace?  I can't be the only one having this issue. Not a hig issue, but sure is getting annoying.

 

 

Older version of the TSB but the same condition and fix is called for - 21-NA-166 1..2

 

No mention of an updated turn signal multifunction switch.  Current switch # came out April 2022 and has been in use since then.  

 

I have a 2022.5 1500 (same interior updates as the 2024+HDs), never had this happen yet.  Same bracket and turn signal switch too as yours.  

 

I'd say its another bad switch or there's something else in how its all assembled is off.  New switch might not be seated all the way, etc.    

Chaser777 Enthusiast

Chaser777

Posted
  • Author
Posted

The first attempt at fixing was this service bulletin. Remove and reinstall switch.  Unfortunately didn't help. I think they did the same thing on second attempt at fixing it, but adjusted or shimmed the bracket, or something like that. Third time they replaced these three parts:  Part numbers on replacements they used on third attempt to fix it: 84924355 switch, 86507598 Coil, and 84483956 bracket. Right blinker still doesn't cancel, and now occasionally the left blinker doesn't cancel.  Left blinker was never a problem in the previous almost 3 months of owning this truck, always been just the right. 

  • 4 weeks later...
Chaser777 Enthusiast

Chaser777

Posted
  • Author
Posted

Still a problem.  In the past 2 weeks we had 3 days that were really warm for this time of year, 60's and a day in the 70's.  During the warm days, the blinker would not cancel in the cool morning, but on my drives back home, both left and right blinker worked flawlessly.  Next morning when it was cold again (30's) it wouldn't work.  Not sure why it would be temperature related.

GMCustomerService Senior Enthusiast

GMCustomerService

Posted
Posted
On 3/18/2025 at 12:52 PM, Chaser777 said:

Still a problem.  In the past 2 weeks we had 3 days that were really warm for this time of year, 60's and a day in the 70's.  During the warm days, the blinker would not cancel in the cool morning, but on my drives back home, both left and right blinker worked flawlessly.  Next morning when it was cold again (30's) it wouldn't work.  Not sure why it would be temperature related.

This is a strange issue indeed, Rob. Will you please send us an email so we can learn more? We can be reached at [email protected], and ask that you share your full VIN so we can assist. By sending us a message, you consent to the information you provide being monitored and recorded by GM or those acting on GM’s behalf, subject to the GM Privacy Statement: https://www.gm.com/privacy-statement.

  • 1 month later...
Chaser777 Enthusiast

Chaser777

Posted
  • Author
Posted

Just to update, this problem did finally get resolved. Wasn't clear to me exactly what was done on this last attempt to fix it. No parts replaced, just uninstalled, reinstalled from my understanding.   But for the last 2 1/2 weeks it has worked correctly.

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

    • SFC Retired
      2023 DRW Wheel Liners

      By SFC Retired · Posted

      Did have to make 1 modification because of the WeatherTech rear mud flaps and that was needing 3 longer screws than what came with the install package. 😄
    • SFC Retired
      2023 DRW Wheel Liners

      By SFC Retired · Posted

      Picked up the liners yesterday. Installed passenger side WITHOUT any modifications. All mounting holes lined up perfectly. Rain is interfering today with drivers side. Very Happy! Will add pics when finished
    • KARNUT
      OCI, not when but why?

      By KARNUT · Posted

      As a matter of amusement I’ll leave this conversation with this. Do you beat the government average fuel estimate? Statistics are a guide to me. Not a rule. Someone once said I have to have the last word. If true and possible may be. I’ll blame that on working in a family business.
    • bluev8
      Intermittent no-code issues on 2022.5+ V8 trucks — what did the shop fail to capture?

      By bluev8 · Posted

      That is a fair point, and I agree that trying to log “everything in the truck” would be the wrong direction.   There are a lot of modules and a lot of traffic. If the product became a full-truck datalogger, the amount of data would get huge very quickly, and most owners would never use it.   I think the first useful version would need to be narrow: - powertrain-side event evidence - selected high-value parameters - communication / voltage / reset events - pre/post event window - short report first, raw log only as backup   One distinction I should make is between active OBD/PID polling and passive bus capture. If you are polling PIDs through OBD, then yes: the more parameters you request, the lower the effective sample rate becomes, and you are adding diagnostic traffic to a vehicle that is already busy running itself. With passive CAN capture, the recorder is not asking all the modules for data. It is listening to traffic that is already on the bus. So it does not consume vehicle bus bandwidth in the same way that a scan tool polling hundreds of PIDs would. But your point still applies in a different way.   Even if passive capture does not add bus traffic, the recorder still has limits: - processing rate - storage rate - timestamp accuracy - decoder workload - event filtering - report size - user attention span   So the answer cannot be “log everything and let the user figure it out.” The product would need to store enough raw evidence to be useful, but only decode, graph, and present the important parts around the event.   A practical report should probably show: - what triggered the capture - how much pre/post data was preserved - which selected parameters changed - how those values compared to baseline - whether the same pattern happened before - whether any voltage, reset, bus-off, lost-message, or communication fault occurred - selected graphs around the event - raw data only as supporting evidence   So I agree with you. More data is not automatically better. The real product is the reduction from raw data into a useful event report.
    • bluev8
      Intermittent no-code issues on 2022.5+ V8 trucks — what did the shop fail to capture?

      By bluev8 · Posted

      That makes sense, and I agree with most of that.   I think the product would need both: 1. a default powertrain template, so it is useful out of the box; 2. user-selected priority parameters, so the owner or shop can choose what they want to see first.   Different users are going to care about different things. One owner may care about oil pressure and voltage. Another may care about misfire trend, AFM/DFM behavior, or U-codes. A shop may want communication events and repeatability first. Your baseline point is probably the most important one. Raw data is not very useful unless the report can show what normal looked like for that vehicle under similar conditions.   The way I would think about it is: - start with a basic known-good baseline - learn normal behavior for that specific vehicle over time - allow the event to be overlaid against baseline - show whether the event was a one-time spike or a repeatable pattern - provide a simple severity level, but with clear limits on what that severity means   For example, early severity could be something like: - Info: event captured, no obvious abnormal pattern - Watch: value moved outside baseline, but not repeated - Warning: repeatable abnormal pattern under similar conditions - Critical: communication loss, voltage drop, bus-off, reset, or severe repeated event   I would not want the first version to say “replace this part.” That would be overclaiming unless there is repair-confirmed data behind it. It would be more honest to say “this pattern deserves inspection.”   On the OBD port question, I think OBD absolutely has a role. OBD is probably the right place for: - DTCs - freeze frame - VIN - calibration information - normal scan-tool parameters - Mode 6 / enhanced diagnostic data if available The reason I am still looking at an ECM-side recorder is that the failure may happen before anyone connects a scan tool. If the owner plugs in a scanner after the event, the pre-event evidence may already be gone unless the ECU happened to save it. So I do not see this as “OBD versus ECM-side.” I see it more like: - ECM-side recorder: always armed, rolling buffer, event evidence - OBD/DLC companion: DTCs, freeze frame, VIN, calibration, normal scan data - phone/cloud: status, notes, upload, report generation, notifications   I agree that phone connection and push notifications would be useful. I just would not want the phone or cloud connection to be required for capture. The recorder should save the event locally even if the phone is not connected. The phone should help with event marking, download, notes, upload, alerts, and report viewing.   For a default GM V8 event report, would this list make sense? - RPM - calculated load / MAP - throttle position - vehicle speed - gear / torque converter state if available - coolant temperature - oil pressure - oil temperature if available - battery voltage - commanded AFM/DFM state if available - actual AFM/DFM state if available - misfire counters / roughness by cylinder if available - fuel trims - relevant U-codes / communication events - bus-off / lost periodic message / module reset / voltage drop events Which of those would you remove, and what would you add?

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...