check engine light comes on when down to 1/4 tank and goes off at 3/4 tank. Also Revs very high.

jorf
0

Asked by jorf Dec 13, 2008 at 02:28 PM about the 2003 Chevrolet TrailBlazer LT

Question type: Maintenance & Repair

I have a chevy trailblazer that the check engine light comes on when down to around 1/4 tank of gas and then after refuel goes off when it is 3/4 tank full.  It also revs very high while driving, then it goes back to normal.  Any ideas?

5 Answers

Danny Wang
3,205

given that you mention the high rev while driving and variations in fuel tank levels my guess, but I am not positive, may have to deal with something in the evaporative emission system

1 out of 1 people think this is helpful.
Adam Morgan
5,415

If the light is staying on until you fill back up, then stop by a parts store and get the code read...

SanJoseTJK
0

Replace the fuel level sender in the fuel tank. A common wear out item on many vehicles. Had to do this on my friends 06 trailblazer and my wife's Isuzu Rodeo. True fix.

Bruce Klug
195

make sure your gas cap is tight. If that doesnt work, buy a new one.

Timothy Kirchofer
115

Yes SanJoseTJK is likely right , the fuel level sensor id a vasriable resistor and likely has a worn out section where resistance is lost on the circuit when the fuel level reaches that level the vehicle requires a fuel level check before the vehicle computer (ECM) can run certain diagnostic tests ,when it runs the test and can not get a signal it turns on the check engine light and sets a DTC you need a code reader to be sure but will likley find 1 or more codes set for the fuel system

Your Answer

Add photo

Related Questions

  • electrical issues 11 answers

    here's a doozy for anyone who is an electrical genius and can figure out what really ails my truck: Here are the issues: 1) lights have gone out while driving during the night (this has happened 2 t...

    2003 Chevrolet TrailBlazer LS 4WD

    -

    Maintenance & Repair

  • Check gauges light and oil pressure 3 answers

    I had an issue with check gauges light and oil pressure dropping to 0 only when slowing down. Had a new oil pump and sensor replaced a month ago and same thing is happening again??? Any ideas??

    2002 Chevrolet TrailBlazer LT 4WD

    -

    Maintenance & Repair

  • TAPPING SOUND FROM UNDER DASHBOARD 4 answers

    SERVICE ENGINE LIGHT COMES ON AFTER FILLING UP ON GAS. REMOVED GAS CAP AND REPLACED WITH NEW ONE. LIGHT CAME BACK ON SO DISCONNECTED BATTERY HOPING IT WOULD RESET. NOW HAVE A TAPPING SOUND FROM UNDER ...

    2004 Chevrolet TrailBlazer LS 4WD

    -

    Maintenance & Repair

  • IS MY FAN SEED SUPOSE TO RUN HIGH? 1 answer

    MY CHECK ENGINE LIGHT CAME ON. I TOOK MY TRAILBLAZER TO AUTOZONE A TROUBLE CODE UP SAYING MY FAN SPEED WAS HIGH. I TOOK IT BACK TO THE CAR DEALER WHERE I GOT IT FROM THEY SAY IT IS NORMAL BUT I DON'T ...

    2002 Chevrolet TrailBlazer LS

    -

    Maintenance & Repair

  • 2004 silverado Z71 flashing check engine light 37 answers

    my check engine light has come on and had started blinking just lately. which means engine misfire. after replacing the plugs and wires the truck seems to have a rough idle and still seems to misfire ...

    2004 Chevrolet Silverado 1500 Z71 Crew Cab Short Bed 4WD

    -

    Maintenance & Repair

TrailBlazer
Looking for a Used TrailBlazer in your area?
CarGurus has 4,950 nationwide TrailBlazer listings starting at $999.
ZIP:

Search Chevrolet TrailBlazer Questions

Chevrolet TrailBlazer Experts

#1 dandyoun
dandyoun
Reputation 380
#2 Tom Demyan
Tom Demyan
Reputation 300
#3 lindatbrennan
lindatbrennan
Reputation 270
View All

Related Models For Sale

Used Chevrolet Tahoe"
403 Great Deals out of 26,743 listings starting at $2,999
Used GMC Envoy"
82 Great Deals out of 2,122 listings starting at $1,900
Used Jeep Grand Cherokee"
796 Great Deals out of 57,745 listings starting at $1,188
Used Chevrolet TrailBlazer EXT"
56 Great Deals out of 1,210 listings starting at $995
Used Ford Explorer"
637 Great Deals out of 39,828 listings starting at $1,295
Used Chevrolet Silverado 1500"
1,570 Great Deals out of 131,841 listings starting at $1,450
Used Chevrolet Impala"
1,492 Great Deals out of 53,184 listings starting at $600
Used Chevrolet Blazer"
14 Great Deals out of 1,583 listings starting at $1,291
Used Dodge Durango"
208 Great Deals out of 19,944 listings starting at $1,299
Used Toyota 4Runner"
195 Great Deals out of 10,709 listings starting at $2,000
Used Ford F-150"
1,907 Great Deals out of 114,658 listings starting at $1,455

Used Cars For Sale

2007 Chevrolet TrailBlazer LT For Sale
32 listings starting at $4,999
2006 Chevrolet TrailBlazer LT For Sale
38 listings starting at $4,995
2005 Chevrolet TrailBlazer LT For Sale
46 listings starting at $3,995