Erratic Fuel Gauge Operation on Chevrolet Trailblazer

The fuel level sensor in the fuel tank may fail causing erratic fuel gauge operation. Our technicians tell us that on high mileage vehicles you may wish to replace the complete fuel pump module assembly if this condition occurs.

On certain 2005 - 2007 vehicles, General Motors has provided a special service policy covering the fuel level sensor, agreeing to pay 50% of the repair cost. This coverage extends for 10 years or 120,000 miles from the original "in service" date of the vehicle. Please contact your local GM dealer for more information.

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Average mileage: 89,998 (5,700–850,000)
7 model years affected: 2002, 2003, 2004, 2005, more2006, 2007, 2008
337 people reported this problem
227 people shared problem details
I hope I am following all of the posting procedures. Long story short, my Trailblazer (2006 with 46,000 miles) was suffering from the faulty fuel level sensor problem. I called GM (and the National Highway people) to lodge a complaint (I took it to a dealer, got a quote and then nearly passed out. I wasn't willing to pay $1000 to repair a fuel level sensor). A few months later, I was driving--with about 50 miles left in my tank, according to my calculations--and my car stopped in the middle of the road. After a fruitless AAA experience (are you sure it isnt a fuse, the battery or you just ran out of gas?), I had it towed to a local repair shop. They said that they have seen a lot of the fuel level sensors go bad, and have seen an increasing problem with fuel pumps. Something about the sensor and pump being attached--one one goes bad, the other one is going to too. They replaced the sensor, pump and filter. Again, totally dumbfounded as why this would happen to a car with 46,000 miles on it (I only buy Shell fuel and have used those fuel system cleaners in the past), I called GM again to voice my concern with my car stopping in the middle of the road. After jumping through a few loops, they tell me that GM just (as in earlier this month) issued a special bulletin on the fuel sensor problem (bouncing back and forth for a while, then eventually reading "empty" all the time)--not a full recall. They will pay 50% of the cost to replace the fuel level sensor (including labor). They wanted me to tow the car to a dealer--I quickly shut this idea down. I already had the dealer diagnose the problem, I wasn't going to pay for a tow (already used my AAA tow) and told them it would have been great if they notified me of the special bulletin when it was issued (because I specifically asked to be added to the list when I first called a few months ago). They transferred my call to an upperlevel person and he told me that I just have to take my paperwork to a GM dealer and they will process it for me. I have yet to go get the paperwork processed (I only got my car back on Monday). I still want a full recall! I think it is absurd that they are essentially admitting that the parts fail prematurely, but they are only 50% at fault... I'd recommend calling GM before you do anything--file a complaint with them and tell them that a 50% reimbursement doesn't cut it.
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At about 50,000 miles, the fuel guage started fluctuating and finally stayed stuck on empty with the low-fuel warning light on. Then after a few weeks the "check engine" light started coming on, especially right after getting gas. We are using the trip odometer to tell us when to get gas, and my mechanic tells me it is $4-500 to repair the fuel sensor. This is a real problem for us because we have emissions inspection required to renew the tag and registration, and it won't pass unless this is resolved. REALLY needs a recall, especially with this long list of people with the same problem!
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Fuel Sensor not reading I think Gm needs to take care of this problem at 100% of the repair cost being on them. I have always had good service when I owned my Ford tempo and Taurus. I will really have to think hard before buying another Trailblazer. worst car and service ever.Take reponsibilty for your defective parts GM!!
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Few months back my gas gauge has went crazy! I have to guess on how much gas I have by the mileage used!The engine light also illuminates @ same time. I now see this is a common probelm & I have reported it too. It contantly "dings" low fuel even when full. I am uneasy every time I go out as when will the senser think there is no gas and just stop on the road? I am very concerned & uneasy now. Had this car since 17,000 miles & now over 80,000 & it has been very well taken care of too. Cant afford $800 plus to get it fixed and with the number of complaints I feel this is a recall issue.
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My gas gauge ALWAYS reads EMPTY! I have to refuel every couple hundred miles to make sure I don't ever run low on gas. I was told by Chevy Customer Service to go get an estimate and diagnosis, paid $95 for this, then was told they were not covering any of the cost for fixing this problem because there wasn't a recall on it only an investigation so I paid $95 for NOTHING!!! I am VERY PISSED and I will NEVER purchase another Chevy again! I should have stayed with a JEEP! I've been dealing with this problem for several months now and it is a pain in the ass. $500 to fix the gas gauge problem and I don't have that kind of cash. A vehicle with this low a milage should NOT have this problem.
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This car has been nothing but a big problem since day 1. If this is a problem that other people have had then why are the makers not paying for them to be fixed :0(
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At 50,000 miles my a/c stopped workin and so did my fuel gauge and I just had to replace water pump. They need more recalls on these trailblazers.
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My fuel gauge has not worked in about a year. I was told it would be around $500.00 to be fixed. I just track my mileage now to know when I have to get gas.
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I filled my car with gas and when I started it afterward the fuel gage showed empty and never came up. Pushed ONStaR and they told me maybe I need to get gas. I told them I just filled it. They asked me if I have a leak, I told them it would have to be the size of a baseball to run out that fast.called GM customer Service.Got it handled for 250.00 for new fuel sensor cuz I told them I wouldn't pay more. The estimate was 750.00. So call GM.
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Fuel gauge does not work at all. Was informed it was the sinding unit in the tank. Was not fixed.
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Gas gauge shows empty when tank is completely full. After about 40-50 miles starts working right....then goes all over the place. Sometimes empty, sometimes quarter full.
Fuel level is is up down and all around. Reads empty when full, 1/2 tank when full. Drops to empty slowly over 1 - 2 minutes. When I stop the engine and restart everything just keeps repeating. As far as repair. Don't have the $450.00 to replace the sensor in the tank. Just going to wait it out until the fuel pump goes out too and then only have one labor bill to replace both.
Changed level sensor in tank
My gas guage always reads empty. I use my fuel used guage to keep from running out of gas. Sorry no solution.
car says low fuel and warning light come on after fill up, gage is irratic dropping to empty in seconds and will on occasion float to half.Will it stop with gas it?
gas tank gauge quit working around 50,000 miles
I too have this weird problem of erratic fuel gauge readings I got the letter from GM saying they would fix/cover 50 percent. I went to my local Chevy dealer in Hudson Ma. I was happy they said they would cover the whole thing. This means: replace fuel level sensor and cover labor..I was glad GM stood behind their cars...WRONG ASSUMPTION.I dropped it off early hoping to get my 2006 Trailblazer back at end of day. At end of day one they call and say i will be responsible for hoses that go to sensor= $120 2 they call and say you should replace fuel sending unit and pump for $533 dollars plus tax..i say i really dont want to...but they say GM is paying all labor so smart to do. I finally agree and im up to $700 to do their so call fix. After i pay bill i go on line and from 3 different places i can purchase this fuel sensor for as low $249.00. This makes what the dealer charged me TWICE the price of the part. So not only does the dealer get fully reimbursed for the labor from GM but they charge the customer TWICE the going rate for OEM parts?part no. for this part is 19153374..check it out...Amazon has free shipping. GM covers part 19177712 sensor kit they say is 200 dollars and can be bought for around 75 dollars. Lesson to be learned here is that dealers charge twice the price for the same OEM parts. Im trying to get some money back from service mgr...but well see what happens. Beware
Just purchased from one owner. Started on my first fill up. Check engine light came on during second start up after fill. Yesterday, the gauge starts working and check engine goes out but after starting the truck again it flairs up and is still not registering but fluctuates between 1/4 and half full.
Its the fuel sensor, My truck thinks its full when it is not even half full.. The low fuel light is always on ,,It will cost 1000.00 dollars to fix. I don't know what to do. GM should fix this problem. My check engine light is always on so I can't get a inspection sticker for it until it is fixed,
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