Question about 2006 Chevrolet Trailblazer

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06 trailblazer will start but will not stay running....changed fuel pump and crank sensor...its like its running out of gas

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The following are the general instructions on the start of diagnosing any electronically controlled engine or transmission problem.

The engine and the automatic transmission (transmission control is only for automatics, engine is still computer controlled no matter the transmission type) in this vehicle are computer controlled and in most cases when a fault occurs a fault code is stored in the memory of the computer control module. There are exception to this, such as the Mass Airflow Meter and fuel pressure problems. What must be done is to have all the basic testing done such as a scan of the system for fault codes as well as a check with a live data scanner tool for engine functions that are not within range of normal, a trained technician is required to know what is correct and what isn't, then based on careful diagnostics done from a factory repair manual the correct part is replaced or the wiring repaired or the computer replaced (known as the PCM or ECM,ECU), which is very rarely the problem. Other basic checks must be done as well such as mechanical problems with the engine as well as engine state of tune and mileage on the engine. The transmission can have mechanical issues as well such as no gear engagement at all or a failed pump or other pressure related problems. Also engine mechanical problems can and do cause many drive-ability related problem such as rough idle and other symptoms.
You may also have a defective ignition starter switch, a common issue and that cuts power off to the system when you release the key from start position

Posted on Nov 08, 2012

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Posted on Jan 02, 2017

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SOURCE: 1997 Chevrolet Silverado Fuel System

Hello Johnholley
I am wondering do you hear the fuel pump when you just turn the key into the on run position not crank just in run and listen and see if you hear the fuel pump run for a second, If you don't hear it you will want to check for power at the fuel tank, and have some one cycle the key while your under the truck with a test light. Hopefully you have power and you hear the fuel pump run. Now if you do hear the fuel pump running then the next thing you will want to check is for spark, It could be the ignition module or pickup coil. check out those thing and I am sure you will be able to figure out whats going on. If you don't get back to me and we can try a few other methods. I sure hope that helps you out johnholley. and thanks for using Fix Ya Bear001

Posted on Jul 20, 2008

sledge1863
  • 149 Answers

SOURCE: 1995 lumina cranks but will not start

Sounds like it has jumped timing, dont know which engine you have so could be chain or belt.

Posted on Mar 23, 2009

  • 5 Answers

SOURCE: 1987 Chevrolet S-10 Pickup1987 chevy s10 2.5l tbi

Check the trottle body postioning sensor...

Posted on Jul 19, 2009

  • 708 Answers

SOURCE: 98 chevy cavalier cranks but wont start changed

try to start the car, than the anti theift would shut the car off. you wait ten min with the key on, until you see the anti theift flash or disapear. than turn key to off position and try to start it. this will reprogram the computer.. Good luck.

you can also try disconnecting the battery for 30 minutes

Posted on Oct 07, 2009

  • 3600 Answers

SOURCE: 90 chevy k1500 350 tbi fuel problem starts but wont stay running

try bypassing the oil pressure switch on the back of the block behind the distributor, if there oil pressure switch goes bad it will do this. had one that drove me nuts trying to fix it then figured out I had to buy a book and low and behold thee it was 3 wire oil pressure switch you can't see between the engine and fire wall just behind the distributor and costs 8 bucks to buy new.

Posted on Jan 16, 2010

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02 trailblazer will not stay running after I crank it without a little gas. Replaced throttle body and still not working right.


need to check fuel pressure.
With out proper fuel pump pressure engine will not start or run. Here is a way to try to start engine. turn key on but do not crank engine over, turn key off, then turn key back on, do not crank engine over. Repete 3 or 4 times. This gets fuelpressure up to where it should start. Have fuel pump pressure tested. Replace pump as needed.

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Apr 21, 2017 | Cars & Trucks

1 Answer

I just swapped engine in 06 trailblazer.it wont start.will start with starting fluid,no fuel pump


recheck all connections may have missed a sensor or a connector or even pinched a wire or line --also fuses relays and wires --test for power to pump

Nov 13, 2016 | 2006 Chevrolet Trailblazer

1 Answer

Chevy Blazer no gas will not start. Changed filter, gas gage lies about level. Goes to zero when starting. Full tank.


Possible bad fuel pump. Have someone crank the engine while rapidly hitting the bottom of the fuel tank with your fist agressively. You can also use a hammer and hit the tank using the flat of the hammer head while the engine is being cranked. If it starts or tries to start, suspect a bad fuel pump

May 20, 2015 | 2003 Chevrolet Chevrolet TrailBlazer

1 Answer

I have a Chevy trailblazer 2003. I changed the fuel pump and camshaft sensor crank sensor what can it be still wont start


Why did you replace the cam sensor? Blazers have this problem with cams...It's not the cams. but the cam slack adjuster/ or guides. Major job.

Oct 04, 2014 | 2003 Chevrolet TrailBlazer

1 Answer

Trailblazer loses power. changed the o2 sensors, secondary air injection pump check valve,transmission oil an filter,an fuel filter. what other thing can be wrong


Hmm, I thought the fuel filter on 05' was on the pump in the gas tank. Must of started that in 06', mine is in the tank which sucks, my older 02' is external. Have you cleaned your throttle body? If not, likely this is your problem. We don't have a pcv system so our throttle bodies collect lots of carbon and gunk. Remember to unhook the batter while you remove the tb. 4 bolts, and you can reuse your hard gasket many times over. I like using Seafoam spray and rag to clean as it's sensor safe.

Mar 28, 2014 | 2005 Chevrolet TrailBlazer LS

1 Answer

06 Chevy Trailblazer cuts off while I'm driving, cranks right back up


Possible a charging problem, dirty battery cables. Does it completely stall out, quit running? Ground wire to computer. If fuel pressure is good, Did they test drive it and the pressure stay good? Have you changed the fuel filter? Several possibilities.

Dec 01, 2013 | 2006 Chevrolet Trailblazer

2 Answers

2001 honda civic ex starts dies no power


i had the same problem with my ek civic it turned out to be the crank angle/position sensor so i would replace it and try starting it then it should run

Jun 26, 2012 | 2001 Honda Civic

1 Answer

I ran out of gas in my 99 chevy tahoe. will not start after gas was pumped. changed fuel filter and additional ignition parts & sensors. More likely the fuel pump or fuel injectors?


If you add a few tablespoons of gas directly to the throttle body after removing the air filter, or use starting fluid (ether), then if the car starts and runs after cranking, then it is a bad fuel pump.

Check the fuel pressure of the fuel pump rail to verify if gas is coming through the system.

If not, it's definitely a fuel pump.

If it were an injector, then it would still try to start on some cylinders assuming it's getting spark.

The fact that the problem started after gas was pumped, points to a fuel pump, as well.

So, I would go for the fuel pump if the fuel pressure is 0 psi or near that, or if one discovers that there isn't any gas coming through the piping when cranking.

Also, check fuses for the fuel pump and injectors.

Aug 17, 2010 | 2008 Chevrolet Tahoe

2 Answers

I will be driving down the road about 65 mph and all of a sudden my truck will just sputter and then have hardly any power with rpm needle jumping from 1000 to 1500...cannot go over 30 mph. If i stop and...


Sounds like a fuel problem. I'd start by changing the fuel filter and running a can of Sea Foam Engine Treatment through the engine. With at least half a tank of gas dump half the Sea Foam in the gas tank and the other half in the crank case.
If this doesn't fix it check the fuel pump, don't just decide to change it or have it changed they can be rather expensive (depending on engine and model).
If the fuel pumps checks good and it's still happening you'll have to start looking into distributor or timing chain problems (usually not intermittent).

Jun 19, 2010 | 2004 Chevrolet TrailBlazer

2 Answers

I have a 2006 Trailblazer with a bad gas sensor. After researching I find lots of people with this problem. Has it ben recalled?


If you are talking abode the fuel level sensor. that one comes on the fuel pump assembly you going to have to change the hole fuel pump. and if you need to know if there is a recall just call your local Chevrolet dealer hand have your VIN number ready because they going to ask you for it. good luck :)

Jun 12, 2009 | 2006 Chevrolet Trailblazer

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