Jump to content

New member

Gee_Emm

By Gee_Emm
in The Off-Topic Bar

Recommended Posts

Gee_Emm New Member

Gee_Emm

Posted
Posted

Hi, first post here looks like a cool site.

 

Im not sure if this is the proper place to post this or not but I will give it a shot.

 

 

On a 99 Denali upon starting the engine the gas gauge pins all the way to the right then returns to the normal position.  While it is running the gauge "flutters"  as in shakes really fast.

 

Anyone know what would cause this and the fix or know where I could find the answer.

 

Thanks.

cowboy02 Senior Enthusiast

cowboy02

Posted
Posted

welcome to the forum...........

 

As for your question could be just good old fashioned needle bounce....  Maybe you got a lot of static in your truck :cheers:

 

Take it back to the dealer and have them look at it, still under waranty right?

CMNTMXR81 Senior Enthusiast

CMNTMXR81

Posted
Posted

Loose connector on and/or bad fuel sending unit.

 

This was a common problem on the old C/K truck.

 

The only other purported fuel gauge problem is if it read empty or full all the time, which is then a either a VCM connector to the IP cluster or the IP cluster itself.

 

The fluttering leaves me to believe it could be the sender.  But that's just a guess.  Is the Service Engine Soon light on too?  If so, it's likely a P0461, P0462, and P0463 code is generating it.

Gee_Emm New Member

Gee_Emm

Posted
  • Author
Posted

There is no check engine light on, warranty was gone long ago and this problem just started about 2 weeks ago.

 

Could it be condensation getting into the connector?  It has been way cold up here and I pressure was the truck at the car wash and wash underneath it.   The fluttering of the needle is really fast and it doesnt move that much, its like you are looking at it without glasses on, it looks fuzzy.

 

 

 

Thanks for all the replys.

 

Btw, is this site a little on the slow side for loading or is it just me?  :cool:

AllGMV8 Enthusiast

AllGMV8

Posted
Posted

I have the same problem with my 98 'Burb.  The gas gauge needle vibrates so fast it looks fuzzy.  It bugs the crap out of me.

 

So where does one start looking for this loose or bad connection?  Gas tank area, behind the gauge cluster or somewhere in between?  And how would you test the sender to determine whether it's bad or not?  

 

Thanks,

Adam

CMNTMXR81 Senior Enthusiast

CMNTMXR81

Posted
Posted

As I think about it, it sounds more like an erradic fuel gauge rather than anything to do with the fuel pump, regulator, pressure or level sensor.

 

Here is the procedures for both a fuel gauge indicating low and high.  There is nothing I could find on "fluttering" or erradic needle activity.

 

Fuel Gauge Always Indicates Empty Gas

Step

 

Important:

Before performing the diagnostics below, perform a diagnostic circuit check and repair DTC's P0461, P0462, or P0463 pertaining to the fuel tank senders.

 

 

Step 1

 

Did you perform the Instrument Cluster System Check?

--

Yes: Go to Step 2

No: Go to Instrument Cluster System Check

 

Step 2

1) Remove the IP Cluster.

2) Disconnect Vehicle Control Module (VCM) connector C1.

3) Connect a J 39200 DMM (continuity) between cavity 9 of VCM connector C1 and ground.

 

Is contintuity present?

--

Yes: Go to Step 3

No: Go to Step 4

 

Step 3

 

Locate and repair the short to ground in CKT 30 (PPL) between VCM connector C1 and the IP Cluster. Refer to Wiring Repairs in Wiring Systems.

 

Is the repair complete?

--

Yes: Go to Instrument Cluster System Check

--

 

Step 4

Replace the I/P Cluster. Refer to Instrument Panel Cluster (IPC) Replacement .

 

Is the repair complete?

--

Yes: Go to Instrument Cluster System Check

 

Fuel Gauge Always Indicates Full Gas

 

Important:

Before performing the diagnostics below, perform a diagnostic circuit check and repair DTC's P0461, P0462, or P0463 pertaining to the fuel tank senders.

 

Step 1

 

Did you perform the Instrument Cluster System Check?

--

Yes: Go to Step 2

No:  Go to Instrument Cluster System Check

 

Step 2

 

1) Remove the IP Cluster.

2) Disconnect the Vehicle Control Module (VCM) connector C1.

3) Connect a J 39200 DMM (ohms) between cavity 9 of VCM connector C1 and cavity 16 of the IP Cluster.

 

Is the resistance greater than the value given?

 

Specified Value = 0.5ohms

--

Yes: Go to Step 3

No: Go to Step 4

 

Step 3

 

Locate and repair the open or cause of resistance in CKT 30 (PPL) between VCM connector C1 and the IP Cluster. Refer to Wiring Repairs in Wiring Systems.

 

Is the repair complete?

--

Yes: Go to Instrument Cluster System Check

--

 

Step 4

Replace the I/P Cluster. Refer to Instrument Panel Cluster (IPC) Replacement .

 

Is the repair complete?

--

Go to Instrument Cluster System Check

 

Instrument Cluster Check Procedure

Instrument Cluster System Check

 

Step 1

 

1) Start the engine.

2) Observe the engine oil gauge.

 

Engine oil pressure should read within the normal range.

 

- Engine Oil Pressure Gauge Always High .

- Engine Oil Pressure Gauge Always High .

- Engine Oil Pressure Gauge Always Low .

- Engine Oil Pressure Gauge Always Low .

- Engine Oil Pressure Gage Inaccurate or Inoperative .

- Engine Oil Pressure Gauge Always High .

 

Step 2

 

Observe the fuel gauge.

 

The fuel gauge indicates the correct fuel level.

 

- Fuel Gauge Always Indicates Empty .

- Fuel Gauge Always Indicates Empty .

- Fuel Gauge Always Indicates Empty .

- Fuel Gauge Always Indicates Full .

- Fuel Gauge Always Indicates Full .

- Fuel Gauge Always Indicates Full .

 

Step 3

 

1) Ensure the engine is at operating temperature.

2) Observe the engine temperature gauge.

 

The engine temperature gauge indicates the correct engine temperature.

 

- Engine Coolant Temperature Gauge Always Cold .

- Engine Coolant Temperature Gauge Always Hot .

- Engine Coolant Temperature Gage Inaccurate or Inoperative .

 

Step 4

 

Observe the voltmeter.

 

Voltmeter indicates a charge of 13 - 14.5 volts.

 

- Volt Gage Inaccurate or Inoperative .

 

Step 5

 

Observe the tachometer.

 

The tachometer indicates the correct engine speed.

 

- Tachometer Inaccurate .

- Tachometer Inoperative .

- Tachometer Inoperative .

 

Step 6

 

Drive vehicle at 30 mph (48 km/h) over a known distance.

 

The speedometer and the odometer operate properly.

 

- Speedometer Inaccurate (J 38522 Unavailable) .

- Speedometer and/or Odometer Inoperative .

 

* Refer to the appropriate symptom diagnostic table for the applicable abnormal result.

 

In step 2 in the last procedure posted, when I link to to any of the "- Fuel Gauge Always Indicates Empty." or "- Fuel Gauge Always Indicates Full ." I get routed back to the first two procedures I posted.  So unfortunately this is one of those cases where you have to use the procedures to dig deeper into something that's causing the issue.

Archived

This topic is now archived and is closed to further replies.

Go to topic listing

  • Latest Articles

  • Posts

    • AndrewF
      Scan Tool Recommendation

      By AndrewF · Posted

      I am in the market for a bidirectional scan tool so was hoping someone can help point me in the right direction. There are so many options out there it is hard to narrow down which make/model to choose.   I have always done my own vehicle work so looking to maximize capability with the scanner. Ideal price is $1k or less but would be willing to exceed if it opens up significant benefits.  Currently my 24 2500 is the newest vehicle but also have a few mid to late 2010s Subarus as well.    It seems that the Autel MP900 has a decent amount of features at a reasonable price?
    • C/K Man
      Silverado 4500-5500-6500 are they still being produced? Would have sold better as GMCs as well

      By C/K Man · Posted

      There was talk over the last couple of years that the contract to build these trucks between GM and International would not be renewed.  International moved production of all their other trucks besides the companion CV model out of the Springfield plant some time ago when they opened their San Antonio plant.  That left Springfield only building the Silverado Medium Duty, International CV Series, and some Express/Savanna long wheelbase cutaways.  International also put the plant up for sale some time ago.  This all answered my earlier question as to why GM and International did nothing with these trucks since they were introduced, as they had basically become a market 'placeholder' with a finite life.    The Silverado Medium Duty/International CV trucks were interesting combination of a GM powertrain, electrical system, and K2XX Silverado cab with an International chassis that was supposedly designed for a step-van type vehicle they never produced.  They were manufactured in International's Springfield plant along with the IH MV series initially.  When first introduced, there was much talk that the Silverado Medium Duty/CV would eventually get a gasoline engine option along with other upgrades and GM and IH would work on a class 6/7 joint venture truck.  This was before VW bought Navistar out, after that happened no more was said.  Draw your own conclusions...   About the time talk started that the GM/IH joint venture was not going to be renewed, rumors started that GM would develop a new line of medium duty trucks themselves.  The story is the new trucks will be part of the next generation HD's due in 2028, and will still feature a 'straight rail' chassis design that the current medium duty has.  GM views this as a desirable feature that differentiates their truck from the competition.  A gasoline engine option is also expected.  As the current Silverado Medium Duty remains in production until September 2026 and there is still a lot of inventory available do not expect any official word for some time.   I believe GM remains committed to their successful partnership with Isuzu, and all the LCF models will still be available from Chevy Commercial dealers.  Isuzu is on the cusp of opening a new large plant in South Carolina and there is also speculation that this may result in new product for both Isuzu and Chevy Commercial dealers.                  
    • davester
      push to talk button

      By davester · Posted

      drive the truck back to the dealer and complain that the button works.
    • davester
      push to talk button

      By davester · Posted

      drive the truck back to the dealer and complain that the button works.
    • nfisherman
      Software Update

      By nfisherman · Posted

      I have a 2026 2500 HD Ultimate. My phone app says there’s a software update available. It’s something about improved battery management and something to do with the running boards. I follow the instructions for the update but the “Check for Updates” option is greyed out in my settings menu. Has anyone else seen this? How did you resolve it? The help message just says “see your dealer” if the download doesn’t work. I’m just trying to save a trip. 

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...