I have a 1999 Silverado with an erratic fuel gauge problem. I pulled the sender, and it does not appear to be the problem. The gauge goes up and down without warning and is almost never correct. I have been using the odometer to keep track of fuel used. I switched out the instrument cluster (a friend had an extra), this did nothing so I pulled the bed to access the tank. I removed the fuel pump and can access the float now. The gauge moves a lot when I move the float from upper most to lower most positions. I still never was able to make it read both extremes? I can jump across the two wires in the connector and make the gauge move all the way to full. When I remove the jumper, the gauge stays on full for 20 seconds, then it starts jumping around again? This makes me believe the sending unit is probably ok. Help if you can. email@example.com
An expert who has achieved level 3 by getting 1000 points
An expert that got 20 achievements.
An expert that got 10 achievements.
An expert that got 5 achievements.
Re: 1999 Silverado erratic fuel gauge
The current to the sender can't be allowed to be DC because it could spark and blow up. So they use a ******** or oscillator to turn it into AC. That could be the problem. It is usually mounted near the gauge.
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need. goodluck!
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
Either your gauge is bad or the fuel level sender is. Most likely it's the sender in the gas tank. To replace it you would have to drain the fuel tank and pull the fuel pump/sender assembly and replace. You cannot just replace the fuel level sender with this car, the entire assembly must be changed out.
There is a TSB on high sulfur fuel usage, and how it impacts the fuel level resistance. If you change fuel, it might start working again. The TSB is : ERRATIC FUEL GAUGE OPERATION TSB 08-2-9
Publication Date: January 22, 2008 FORD: 2004-2008 F-150 LINCOLN: 2006-2008 Mark LT
ISSUE: Some 2004-2008 F-150 and 2006-2008 Mark LT vehicles, built before 12/3/2007, may exhibit erratic fuel gauge operation or illuminated malfunction indicator lamp (MIL) with diagnostic trouble codes (DTCs) P0460 or P0463, and/or Instrument Cluster Module DTC B1201. This may be caused by sulfur contamination in the fuel causing an open or high resistance in the fuel level sender.
ACTION: Follow the Service Procedure steps to correct the condition.
Install a new fuel level sender following the service procedure instruction sheet provided in the fuel sender kit.
PART NUMBER PART NAME 8L3Z-9A213-E Kit - Fuel Sender (2006 starting 12/8/2005 through 2008 - FFV-26 Gal Tank - 126/132" WB ) 8L3Z-9A213-F Kit - Fuel Sender (2006 starting 12/8/2005 through 2008 - FFV-30 Gal Tank - 139" WB) 8L3Z-9A213-G Kit - Fuel Sender (2006 starting 12/8/2005 through 2008 - FFV-27 Gal Tank - 145/151/163" WB 8L3Z-9A213-H Kit - Fuel Sender (2006 starting 12/8/2005 through 2008 - FFV-36 Gal Tank - 145/151/163" WB 8L3Z-9A213-A Kit - Fuel Sender (2004 through 2008 - Gas-26 Gal Tank - 126/132" WB 8L3Z-9A213-B Kit - Fuel Sender (2004 through 2008 - Gas-30 Gal Tank - 139" WB 8L3Z-9A213-C Kit - Fuel Sender (2004 through 2008 - Gas-27 Gal Tank - 145/151/163" WB 8L3Z-9A213-D Kit - Fuel Sender (2004 through 2008 - Gas-36 Gal Tank - 145/151/163"WB
WARRANTY STATUS: Eligible Under Provisions Of New Vehicle Limited Warranty Coverage And Emissions Warranty Coverage IMPORTANT: Warranty coverage limits/policies are not altered by a TSB. Warranty coverage limits are determined by the identified causal part.
OPERATION DESCRIPTION TIME 080209A 2004-2008 F-150, 2006-2008 Mark LT: Install New Fuel Level Sender, Includes Time To Remove And Install Fuel Tank (Do Not Use With 9002A, 9002A4, 9002A6) 1.9 Hrs.
DEALER CODING BASIC PART NO. CONDITION CODE 9A299 42
this problem is only caused by one thing, a defective gas tank gauge sending unit, pull the gas tank and replace it, it is due to the chemicals added to the new clean burning gas, it destroys the older senders. The sender is only avail with the pump module, about $200 for the part, and 3 hours of labor, just did a 1999 last week for this same problem.
I had the same issue with my 99 Silverado, The sending unit and fuel pump had to be replaced. (the fuel pump and sending unit are one piece units) Chevrolet dealers are aware of this issue, but its still not listed as a recall. I received a lifetime warranty w/labor when I had mine replaced. I also had an issue with the instrument cluster in dash that had to be sent out for repair unrelated to fuel gauge (speedometer)...also dropping the fuel cell is how mine was done also.
My guess would be the fuel pump purchased was bad...
Yes the tank has to come out. It really doesn't require any special tools. You should have everything you need at the ag dealer.
Try to get as much fuel out of the tank before you start so it is easier to work with.