Question about 2002 Chevrolet Blazer

1 Answer

Troubleshooting non-functioning gas gauge on 2002 Blazer 2-door

Is there anything specific I should do to find what's wrong with a non-functioning gas gauge on my 2002 Chevy Blazer LS 2 Door? Thanks in advance!!

Posted by on

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that gotĀ 5 achievements.

    Novelist:

    An expert who has written 50 answers of more than 400 characters.

    Governor:

    An expert whose answer gotĀ voted for 20 times.

  • Expert
  • 104 Answers

Sure there is!

DO THIS FIRST!!!
When you turn the key on, and the gauges and warning lights come to life, does the needle on the fuel gauge move a tiny bit? It should. If it does move a hair, this is a good sign your gauge is still good. If not, keep reading.

The gauges themselves are usually not at fault, but they can fail, of course. Usually, it's the sender or float that's the culprit. The assembly resides in the fuel tank in the module or unit that houses your fuel pump. Many customers (when faced with the cost of this tank job) will opt for waiting until the fuel pump goes bad, and replacing pump and sending unit together. However, there are obvious drawbacks to this!

ONE test you could do if you are good at driveway car work is this: Crawl under vehicle and find the bundle of wires (not tubes or lines) that goes up to the top of the fuel tank. Sometimes you can reach it through the rear wheel well. Follow this small group of wires up to wherever it plugs in to the pigtail coming out of the tank. THis could be on top of tank, or just outside the perimeter of the tank. Unplug this connection. Using a common 12 volt test lamp probe, ground the test lamp, turn the key to the "ON" position so dash lights up, and touch tester to each wire tip on the end not connected to the tank (engine side of wire harness.) Have someone watch the fuel gauge as you touch the leads one by one. The gauge should move when one of these is grounded thru the lite. Total deflection of the needle means your sender is at fault, not the gauge. BUt it's usually the sender, anyway. THey're cheap enough, but the labor on a tank job can vary from place to place.

Good luck, TT

Posted on Feb 23, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

What kind and how do you fix to where the gas gauge reads correctly in a 2001 Chevy blazer LS 4x4 4 door?


If it isn't the gauge in the dash then it will be the fuel level sesnor in the gas tank. This will require dropping the tank to getvat it. Not a cheap'repair, part is cheap, labor won't be so shop around. I know some guys have just got a tank from salvage then they could just swap out the whole thing quickly.

Jun 04, 2012 | 2001 Chevrolet Blazer

2 Answers

I have a 1997 chevy blazer and the check engine light will not go out the gas gauge stop working and It's not getting enough gas to the carbeurater sprayed starter fluid and it starts up the high beam...


if the check engine light is on then there is a code set in the ecm(computer) that you need to have pulled and diagnoised.if your spraying starter fluid and it starts then you have a fuel delivery problem,could it be out of gas,plugged fuel filter,bad fuel pump,injectors not being comanded to open by the ecm.this should help to get it running,

Sep 18, 2011 | 1997 Chevrolet Blazer

1 Answer

What's the easiest way to change the spark plugs and my gas gauge bounces around alot it goes from full to empty. my 4wheel drive wont engage either


jack it up, use jack stands. take off the front wheels, and go in through the wheel well to get to the spark plugs. Gas gauges on every blazer is freaking crazy. mine acts up when it`s at a 1/4 tank. Park up hill it shows more, park down hill, it shows empty.

To much trouble to replace, unless you have the time and money to replce the sending unit.

Feb 16, 2011 | 2002 Chevrolet Blazer

2 Answers

1997 blazer fuel gauge doesnt work i put a new fuel pump in and it still didnt work.... its pegged at full


Unplug the fuel pump, turn on the ignition and see if it goes to empty. Is this a 4 or 2 door blazer? If it is a 4 door this will be easy.

Apr 03, 2010 | 1997 Chevrolet Blazer

1 Answer

Trail blazer gas gauge reading empty when its


The sending unit in the gas tank must be replaced it may be possible to gain access through the back storage compartment by lifting up the rug look for an access panel with a couple of screws holding the plate on remove it and you should be able to look down through and see the gas tank and a couple wires going to the sendind unit unscrew the screw remove and replace if access plate is not there then it is possible the gas tank must be removed to do the job purchase a Haynes repair manual.

Nov 06, 2009 | 2002 Isuzu Axiom

2 Answers

1997 blazer fuel gauge is not working,


VERY COMMON GM problem . the sending unit in the tank is faulty. You are usually better off replacing the whole fuel pump module assy as opposed to only the sender because you can damn near buy the whole assy cheaper than you can buy the sender only for at the dealer which is where you will have to buy the sender if you only want to replace it and not the whole "She-bang".

Nov 04, 2009 | 1997 Chevrolet Blazer

1 Answer

My 2002 chevy blazer gas gauge went out. before it went totally out it always read a 1/4 tank. the feul pump still works great. could it be a fuse that went out that doesnt relay it to the dash? where is...


Under the hood , left upper fender wall . black square box with screw knob in center, ECM B fuse controls Fuel Pump, Fuel Sender, Fuel Gauge... Also you can get a repair manual from Autozone or Oreily's , Chilton has them they are very informative...

Oct 24, 2009 | 2002 Chevrolet Blazer

2 Answers

Help blazer won't take gas...


Hi: Canister you thinking about is located behind L rear bumper end cover. Won't have anything to do with Blazer not taking gas though. If you look behind the filler on the rubber filler pipe you should see a small rubber line with a black breather on top of it, that is what lets air out of your gas tank when filling vehicle, check it to see if plugged or damaged. Hope this helps. Please rate suggestion... ty

Feb 25, 2009 | 2002 Chevrolet Blazer

2 Answers

Gas Gauge Problem


the problem is the gas tank sending unit is defective, u will have to remove the gas tank and replace it, there is no other cause of this type of problem.

Feb 09, 2009 | 2000 Chevrolet Blazer

2 Answers

2002 chevy blazer fuel pump (4 door)


yes you have to drop the tank. you will also need a fuel line tool to unhook the fuel lines. before you drop the tank see if tou can reach and wiggle the electrical connection on the top of the tank. these pumps have a pigtail issue. please rate

Dec 08, 2008 | 2002 Chevrolet Blazer

Not finding what you are looking for?
2002 Chevrolet Blazer Logo

1,333 people viewed this question

Ask a Question

Usually answered in minutes!

Top Chevrolet Experts

yadayada
yadayada

Level 3 Expert

61037 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

21949 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

6812 Answers

Are you a Chevrolet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...