2015 Terrain with gas smell on startup - TerrainForum.net: GMC Terrain Forum
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post #1 of 6 (permalink) Old 10-10-2019, 11:46 AM Thread Starter
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2015 Terrain with gas smell on startup

Hi, new to the forum and have only had my 2015 since February. For the last couple of months have been detecting a destinct gas smell upon start up, especially after the suv has been sitting for a while, it doesn't last while driving, just upon starting. Anyone else ever experience this? I googled it and on older models it suggested it might be a fuel pressure regulator, but for the life of me I can't find anything specific to the 2015, nor any replacement fuel pressure regulator for a 2015. HELP!!! please
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post #2 of 6 (permalink) Old 10-10-2019, 04:47 PM
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I guess it could possibly be a cracked exhaust manifold. The 4cyl Terrains are known to have this problem. I had to have mine replaced for cracking. Might be worth a look to rule it out as the cause.
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post #3 of 6 (permalink) Old 10-24-2019, 09:15 AM Thread Starter
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So the issue is still happening, is worse when nose of car is on a downslope, but I've notice if I have eco mode on, it doesn't seem to do it as much, not sure why. I'm wondering if it might be an issue with the fuel rail pressure sensor perhaps?
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post #4 of 6 (permalink) Old 11-13-2019, 06:32 AM
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could be a cracked exhaust manifold. i m with daedra

2014 GMC Terrain 2.4 SLE-1
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post #5 of 6 (permalink) Old 11-13-2019, 08:45 PM
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Raw fuel smell or exhaust smell ?
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post #6 of 6 (permalink) Old 11-13-2019, 10:52 PM
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If you are smelling gas, get underneath & follow the gas lines thoroughly from engine to the tank. On HHRs the gas line is prone to a leak above the wheels, if you live in snow & salt areas.


That corrodes the line especially where they have a coating it traps the salt etc.

2008 HHR Panel 2LT, purchased Aug 28, '09 to date. Great lil ride.

Currently studying the Gen 1 Terrain for a possible next ride.
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