Question about 2005 GMC Sierra

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I have 2005 gmc sierra 2 wd i was driving down the road when i noticed my engine light was on and a warning to check gas cap so i pulled over checked it sure enough it was off put it back on tightly then my engine light came on i read thru the owners manuel it says that could be areason it came on that by running a couple off tanks of gas thru it it could go off but it is still on the truck is running great there doesy seem to be aany thing wrong any suggetions jr

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  • pvf_1963 Nov 02, 2010

    my problem was solved i got anew gas cap i went to autozone they hooked up a tester it was the gas cap .new cap light went off .......jr

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I have a 2005 4WD Sierra . My engine light has been on for a month , I tried the gas cap deal too . It stayed on . It might be a computer problem , Im having mine checked real soon , It might need to be reprogrammed . I had problems with my 4WD , They had to reprogram the computer . That has worked fine ever since then

Posted on Oct 27, 2010

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Ignore the light.

Posted on Aug 04, 2010

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While I am driving my 2005 dodge Durango on the highway a red light comes on its upside down key in water. Then when I stop a shut the truck off and then on it has a loud ticking noise. How to fix it


Hi, you will have to check your owners manual to verify the symbol and what it could mean.

See below, if it looks like that,(it sounds like a thermometer symbol to me) it could indicate engine overheating, so check all your fluid levels as well as any leaks for water, antifreeze, oil etc.

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I have a 1991 gmc sierra and my oil pressure is dropping down to zero and it has began to knock it was not knocking or anything until i noticed my brake light was flashing now i reset the computer but


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The onboard dash computer of my 2006 sierra z 71 4x4 says to tighten my fuel cap, and now my check engine light is on. there is only 94000 km on this truck


Hello,
This is a common issues with this truck. You have probably tightened the gas cap a bunch of times and are like what the heck. The gas cap DIC warning is part of the evaporative system to reclaim gas vapors. The onboard computer on the truck monitors the gas tank vapor pressure, which checks for vapor leaks in the fuel system. This warning involves a pressure mismatch, which the onboard computer relates to a fuel vapor leak. It assumes fuel vapors are escaping via your gas cap thus circumventing the purpose of the evaporative system. A common fix is to dip your finger in a bit of motor oil and put it onto the gas cap gasket to seal it (like you do an oil filter.) This should solve your problem. If the gasket is ripped or torn then buy a new gasket or a new gas cap. The reason for the oil is to lubricated the gasket again as they get very dry over time, given their location.
Regards, Tony

Apr 20, 2011 | 2006 GMC Sierra

1 Answer

Gold colored light is on, my wife is driving the truck, says it is a geometric figure with two handles.She is afraid to turn the key off and reset it, because she is afraid it will not restart.


Sounds like the check engine light. Usually just an emissions warning such as loose gas cap. If the vehicle is behaving normally don't worry too much about it.

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I have a 94 chevy s-10 p\u it idols rough i


Checked and cleaner EGR?. Misses all the time or just at idle, going down road? Have you tried pulling one plug wire off cap or plug at a time to see if you can isolate which cylinder it is, then work from there?
Don't forget, Insulated pliers or similar to pull those wires.

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