fuel cap loose message - The 1947 - Present Chevrolet & GMC Truck Message Board Network

boatpuller · 10-24-2008, 03:18 PM

my 05 silverado z71 with the 5.3.only has 24k miles and no noticeable loss of power or fuel milage. lately it's displayed the message "fuel cap loose".or something similar i can't remember the exact wording.it's done it twice,both times just a few minutes after leaving the house.and both times i checked it.it was tight.now,after the latest episode the check engine light came on steady.of course the truck went off warranty earlier this summer.as i'm not able to get it somewhere to get the code read for a few day's,i was wondering if anyone has had a similar expeirence?

robin58 · 10-24-2008, 04:47 PM

I think you'll find any car since OBDII sets an error code/warning message if it's loose. Are you turning gas cap past tight so it "clicks". If yes, then it's probably failing. If you have a friendly local inspection station they might check the cap for you to tell you if it is losing pressure.

boatpuller · 10-24-2008, 04:55 PM

Quote:

Originally Posted by robin58

I think you'll find any car since OBDII sets an error code/warning message if it's loose. Are you turning gas cap past tight so it "clicks". If yes, then it's probably failing. If you have a friendly local inspection station they might check the cap for you to tell you if it is losing pressure.

the cap would be the cheapest place to start.i read that somewhere,i suppose if it's not holding pressure the check engine light could stay on?

bowtieboy93 · 10-24-2008, 08:26 PM

buy a new cap
if the loose light is on and its tight
then it, of most things will be that
and they are cheap

**truckdude239** · 10-25-2008, 05:09 PM

sounds like its time for a new cap. i bet your code is

evap emission control system leak (gross leak detected)

Green Machine · 10-25-2008, 09:14 PM

Our 2006 Impala kept getting the same message and it was not the cap. Some solenoid vent valve had to be replaced. They did a "smoke check" to find the leak.

**truckdude239** · 10-26-2008, 02:13 PM

yeah there is vent solenoid on the top of the gas cap

boatpuller · 10-26-2008, 10:06 PM

well,i went and bought a new cap.check engine light went off within about 5 mile's after.we drove about a 150 mile's round trip down to seaside,oregon.check engine light never came back on

so,i'm keepin the ole fingers crossed.it almost seem's too simple to be true.i usually don't have that kinda luck.normally turn's into a 500 buck show.

redneckgirl · 10-27-2008, 07:45 AM

My 03 Yukon threw the check engine light for the evap code. When I had gotten gas, the cap felt as tight as it would go, but it had gotten hung up on the strap that keeps the cap from getting lost. Not being used to owning something this knew, I didn't even think about not hearing the clicks...Now I make absolutely sure I actually listen for the clicks

10-24-2008, 03:18 PM	#1
boatpuller Registered User Join Date: Sep 2005 Location: Sun City West, Az Posts: 3,822	fuel cap loose message my 05 silverado z71 with the 5.3.only has 24k miles and no noticeable loss of power or fuel milage. lately it's displayed the message "fuel cap loose".or something similar i can't remember the exact wording.it's done it twice,both times just a few minutes after leaving the house.and both times i checked it.it was tight.now,after the latest episode the check engine light came on steady.of course the truck went off warranty earlier this summer.as i'm not able to get it somewhere to get the code read for a few day's,i was wondering if anyone has had a similar expeirence? __________________ " Never look up a dead dogs butt." Last edited by boatpuller; 10-24-2008 at 03:21 PM.

10-24-2008, 04:47 PM	#2
robin58 Registered User Join Date: May 2007 Location: Louisiana Posts: 763	Re: fuel cap loose message I think you'll find any car since OBDII sets an error code/warning message if it's loose. Are you turning gas cap past tight so it "clicks". If yes, then it's probably failing. If you have a friendly local inspection station they might check the cap for you to tell you if it is losing pressure.

10-24-2008, 08:26 PM	#4
bowtieboy93 Registered User Join Date: Feb 2007 Location: (Cloverdale) Surrey BC Canada Posts: 1,566	Re: fuel cap loose message buy a new cap if the loose light is on and its tight then it, of most things will be that and they are cheap __________________ Travis travis_moffatt@hotmail.com 1969 Chevrolet C-10 LWB, 350c.i., TH350, In Pieces. 1991 GMC Sonoma, IROCS s10 grill 1963 Ford Galaxie 351/C4

10-25-2008, 05:09 PM	#5
truckdude239 Senior Member Join Date: Sep 2005 Location: Lewisville, Nc Posts: 10,238	Re: fuel cap loose message sounds like its time for a new cap. i bet your code is evap emission control system leak (gross leak detected) __________________ David fuller Ase Certified Mechanic Click here to help support our board!! 1971 Chevy c-10 under going a 4.8l LSx swap Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305 2007 Honda Accord my daily 145kmiles 2002 Honda Accord 4 door With 330k(sisters car) 2005 toyota Avalon 228k( brothers car) 2002 Sububran 5.3 245k 2000 Tahoe 5.3l 378 General manager for Marco's Carwash & lube

10-25-2008, 09:14 PM	#6
Green Machine Senior Member Join Date: Jul 2004 Location: Estherville, Iowa Posts: 3,371	Re: fuel cap loose message Our 2006 Impala kept getting the same message and it was not the cap. Some solenoid vent valve had to be replaced. They did a "smoke check" to find the leak. __________________ 1968 C10 307 3spd Long Fleet ------ http://67-72chevytrucks.com/vboard/s...d.php?t=201103 1970 C10 305 Super T10 Long Fleet --- http://67-72chevytrucks.com/vboard/s...d.php?t=202285 1971 C20 383 TH350 Dana Posi ----- http://67-72chevytrucks.com/vboard/s...d.php?t=206894 2001 GMC Sierra 1500 C3 6.0 Last edited by Green Machine; 10-25-2008 at 09:14 PM.

10-26-2008, 02:13 PM	#7
truckdude239 Senior Member Join Date: Sep 2005 Location: Lewisville, Nc Posts: 10,238	Re: fuel cap loose message yeah there is vent solenoid on the top of the gas cap __________________ David fuller Ase Certified Mechanic Click here to help support our board!! 1971 Chevy c-10 under going a 4.8l LSx swap Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305 2007 Honda Accord my daily 145kmiles 2002 Honda Accord 4 door With 330k(sisters car) 2005 toyota Avalon 228k( brothers car) 2002 Sububran 5.3 245k 2000 Tahoe 5.3l 378 General manager for Marco's Carwash & lube

10-26-2008, 10:06 PM	#8
boatpuller Registered User Join Date: Sep 2005 Location: Sun City West, Az Posts: 3,822	Re: fuel cap loose message well,i went and bought a new cap.check engine light went off within about 5 mile's after.we drove about a 150 mile's round trip down to seaside,oregon.check engine light never came back on so,i'm keepin the ole fingers crossed.it almost seem's too simple to be true.i usually don't have that kinda luck.normally turn's into a 500 buck show. __________________ " Never look up a dead dogs butt."

10-27-2008, 07:45 AM	#9
redneckgirl Registered User Join Date: Jun 2006 Location: Bel Air, Maryland Posts: 4,853	Re: fuel cap loose message My 03 Yukon threw the check engine light for the evap code. When I had gotten gas, the cap felt as tight as it would go, but it had gotten hung up on the strap that keeps the cap from getting lost. Not being used to owning something this knew, I didn't even think about not hearing the clicks...Now I make absolutely sure I actually listen for the clicks __________________ The place where you made your stand never mattered. Only that you were there... and still on your feet. Stephen King



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