Question about 2007 Chevrolet TrailBlazer SS

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07 trailblazer engine light stays on....amcco reset it and told me it was the gascap....i tightened it, restarted it after I got home and it came back on.....faulty gascap??

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Probably. If they scanned the ECM that came up then, YES! Do Not buy a cheap or wrong gas cap!!!

Posted on Aug 27, 2010

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Posted on Jan 02, 2017

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1 Answer

Gascap message in mileage readout on dash. Engine light is on. What is the problem and how do I fix it. ??


The gas cap is either not on or improperly installed, remove the cap and reinstall it until it clicks when tightening. Read your owner's manual, the info is in there. If the light still stays on replace the gas cap.

May 19, 2017 | Cars & Trucks

1 Answer

Check engine light on


Try tightening the gascap. Go to an Autozone, Advance, or Oreilys parts store. They will give a free scan and it probably will show that there is an Evaporative emissions system leak. A leaky gascap can generate this Code.

Dec 02, 2013 | 2000 Mercury Mountaineer

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07 pacifica gascap light will not go off


Scan for emission fault then follow the correct diagnostic procedure it may have a large leak in the emissions some where

Aug 30, 2012 | 2005 Chrysler Pacifica

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Check engine with error codes P1111 and P0455


The Code 455 is showing the large leak in the Evaporative system (gascap) and the Code 1111 shows there are no defects.

You can get these codes wiped off with a scanner free at Autozone, Oreilys, or Advance. They may clear by themselves after 35 startups.

It would just appear to be a latent record of the old condition before and after you tightened the gascap.

Aug 29, 2012 | 2003 Jaguar Xkr

1 Answer

I cannot get my check engine light to stay off. It comes on and off and I was told it was the gascap. The ABS light wasnt reset when I had some repairs done. How can I get them both to stay off.


Some auto parts stores have pressure testers to check the seal on your gas cap to ensure it's not loosing pressure or you can buy a new one. I would suggest checking your vehicle for trouble codes first to be sure though. If it's your gas cap it will be an evaporative emissions control code. Your abs system requires a separate scanner to check for problems but usually it is just the sensor that goes bad and needs to be replaced.

Jan 31, 2011 | 2006 Dodge Caravan

3 Answers

I took my Aspen07 to the shop and they replaced the gascap with a factory gascap, cleared the codes and the gascap message is still on as well as the check engine light. Any suggestions?


the check engine light is most likely evap system large leak which is what causes the gas cap light it probably needs a nvld pump or it has a leaking evap tube under th vehicle.

Dec 15, 2010 | 2007 Chrysler Aspen 4x2

2 Answers

Fuel cap light keeps coming on and then the check engine light. This was repaired two weeks ago and light came on last night.


Hello, what did someone do to repair it? Here is what you need to do. Go to Autozone or Oreillys and get a free scan. If it still shows gascap then ask them to clear the onboard computer. With the engine off, tighten your gascap again.

Everytime you put on the gascap loosely, you will get this alarm and it will stay on 25-35 Startups or until you get the computer cleared.

However, if you eliminate the gascap there are other problems which you may have that require a special tool called a smoke machine. You have a leak in one of your pollution hoses for the fuel tank. Only the smoke machine can find a small leak like this. Once you find the leak it is a simple matter to fix.

You can call around to find a repair shop with the proper equipment. I hope you find my solution informative and feel well served.

Dec 10, 2010 | 2003 Mercury Grand Marquis

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How to shut off gascap light chrsler aspen check engine light goes off but because gascap light stays on check engine light returns. So how can i clear gascap light


You may have a faulty gas cap. If you are tightening the cap down securely the light will go off after the car is driven about 40 miles. I suggest installing a new gas cap which should cost about $15 at your local auto parts store. *** Please rate me on this answer.***

Jun 05, 2010 | 2007 Chrysler Aspen 4x2

1 Answer

40000 miles on Trailblazer gas guage shows empty/check engine lig


i have the same problem and it will cost to have it fixed.but right now we are using our trip odometer by 1st fulling up and refueling at 300 miles then resetting.as far as the check engine it could be as smple as a lose gascap. go to advance auto parts and ask them to check it.they will do it for free.if you buy the part from them you can take it back and they will clear your codes.hopes this helps you get by for a while

Jul 11, 2009 | 2006 Chevrolet Trailblazer

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