gas / fuel odor - Chevy Colorado & GMC Canyon
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post #1 of 15 (permalink) Old 12-22-2005, 03:23 PM Thread Starter
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gas / fuel odor

Raw gasoline smell . . . can't stand to drive the truck with this smell!
Interior smells of gas with heater on & exterior smells of gas when parked in garage. :(
Dealer can't find any problem. Said it must be exhaust entering via vents.
Anyone have the same problem . . . know of any TSB
Any help would be great.
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post #2 of 15 (permalink) Old 12-27-2005, 02:29 PM
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Yep. I get this when during cold starts (not cold temerature, just cold engine) and I turn the blowers on immediately. Gas smell seems to vent into the cabin.

I have a 2004 with 15K miles, purchased Sep 04. It did this when first purchased and on two trips to service was told 'all is normal'. According to service, hooking to computer checks all 'emisions' and 'fuel' systems. Any leaks would be detected.

Well, it seems something leaks, but I don't see how I can pursuade service to do anything else... they're limited to what they can do (if they want to be paid by GMC) under warranty.

Others? Thoughts?

Northern NJ Larry
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post #3 of 15 (permalink) Old 12-27-2005, 05:46 PM
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I get a gas smell in the mornings now since it's so damn cold. But I generally leave the blowers off and let the engine heat up for a few minutes.
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post #4 of 15 (permalink) Old 12-27-2005, 07:12 PM
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I've never gotten a gasoline smell in my truck. And if I did, I'd make sure it went back to the dealer at least 3 times. Then I'd try to find someplace that has a gasoline sniffer and get a reading.

Then I'd be talking to GM about replacing the truck for a hazardous problem that they can't seem to fix. Remember, gas vapors are far more hazardous than the liquid.


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post #5 of 15 (permalink) Old 12-27-2005, 07:20 PM
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I agree. With ported injection fumes must mean a leak somewhere. Hard to believe it can't be found.

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post #6 of 15 (permalink) Old 12-27-2005, 08:03 PM
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Any smell is to much.
Never had any in mine.
Call GM and get them to get your dealer on the case.

'07 silverado 4X4 ext cab/5.5' box
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post #7 of 15 (permalink) Old 02-06-2006, 08:12 PM
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Yes, I have the same problem. Only happens in the morning when first starting. I never noticed it was related to turning on the blower. I will check it out tomorrow to see if it doesn't smell without the blower. I have an oil change coming up this month and I'll see what the dealer says.
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post #8 of 15 (permalink) Old 02-06-2006, 09:10 PM
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You should NOT have a gas smell in your truck. Something is wrong or leaking. I've had my Coly over two years and 20K miles and never had a gas smell.

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post #9 of 15 (permalink) Old 02-06-2006, 09:34 PM
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I had a gas smell the first couple months after I bought my truck in September of 2004. I took it to the dealer, and it conveniently did not smell like gas when they looked at it, so nothing was done. A few days later, the smell went away, and it has not returned since.
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post #10 of 15 (permalink) Old 12-09-2009, 05:49 PM
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Re: gas / fuel odor

Yesterday I started my 2005 Colorado in the driveway and got out and let it warm up--when I got back in it reeked of gas.....was so bad I had to open before warming the truck I got in to see if it smelled, it did not, I let it warm up, did not turn on the heat or smell until I turned the heat on...the smell is definetly coming from the vents.....hubby looked under the hood and couldnt see any leaks and there are no leaks on the driveway. Anyone have a clue as to what may be wrong?
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post #11 of 15 (permalink) Old 12-09-2009, 06:17 PM
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Re: gas / fuel odor

Well, you did good by trying different things. Now, I'd make sure you advise a dealership about it and make sure they write down all that you did in order to isolate the issue. Sometimes, you just have to help the poor bastards out.


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post #12 of 15 (permalink) Old 12-09-2009, 08:30 PM
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Re: gas / fuel odor

The air is being pulled in from the cowl and if you have a fuel line problem under the hood, the smell could easily enter this way.
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post #13 of 15 (permalink) Old 12-10-2009, 07:05 AM
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Re: gas / fuel odor

I also have a fuel smell....however not from the vents, engine bay or interior. My CEL came on after the fuel cap warning came on a few times on the DIC. So about the smell, it is coming from the filler area (not necessarily the filler) and I have gone through two Fuel caps and right now it is an OEM cap from GM. When I get out and walk towards the back of the truck you can smell fuel. Also running rich. Terrible mileage. I have heard people saying they had problems with the vent solenoid. I havent had a chance to scan the pcm for a code, but has anyone else had a problem like this with the odor of fuel at the aformentioned location?
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post #14 of 15 (permalink) Old 12-11-2010, 06:03 PM
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Re: gas / fuel odor

I had the same problem I opened the hood and from the driver side I looked at the engine,the front of the F.I. I noticed the fuel pressure regulator looked "wet" I touched the FPR and smelled my finger it smelled like gas so I took it to the shop they r&r a new FPR now the smell is gone. :D
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post #15 of 15 (permalink) Old 01-27-2014, 08:03 PM
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Talking My 2-cents on the gas smell

Ok- I just bought a 2005 Colorado about 6 months ago as a vehicle to drive to work, and to haul around a few things. Its a CrewCab with 110,000k miles. I've replaced the headlamps, front grill clips, and window actuator so far. Once it got cold here, I would start up the truck and it would reek of gasoline. I thought maybe it was just really bad smelling exhaust, but I would hop inside and it reeked of gas also. After dealing with this for a couple of weeks, I decided to try and track it down. I think my solution was 1 of 3 things I did. 1- I took off my throttle body to clean it, as I had a CEL and rough idle. The cleaning eliminated the CEL and rough idle, but I also noticed the air duct hose connecting to the throttle body itself was folded back on the bottom side (hard to see or get to). When I put everything back I made sure this was fully onto the inlet of the throttle body and the hose clamp was tight. 2- I noticed when taking the resonator box off, that the small crankcase ventilation hose towards the back (underneath) was really dry rotted and cracked. I ordered a new one off of EBay and replaced it. 3- and probably least likely - I noticed the small hose going to the top of the fuel regulator was not all the way down. I noticed this while looking for leaks aroung the fuel pressure regulator as some others have suggested. Anyway one of these 3 changes seems to have fixed my gasoline smell for good. We've had plenty of cold days where I have ran the heat, and nothing! Keeping my fingers crossed that this fixed it and hope that it may help someone else out. My theory is that it was either the crankcase hose or air duct to the throttle body, letting gas\exhaust smell fill up the engine compartment and then the vents sucking it right into the cab. They are all in close proximity, so it makes sense to me, anyway!
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