Fuel leaking on 2008 gmc sierra

[seadoobutch]

Hey guys just in the past couple days I have noticed a fuel smell on the drivers side of my truck. Today I looked underneath the truck and found fuel leaking on the side of the tank, not a ton but you can see it by looking through the side of the tank plastic cover. I have also developed an issue with it starting funny in the past couple days to. I will turn the key over and the starter will engage even if I turn the key back just a little, don't know if that is a separate issue or one cause by fuel issue too?

 

Thanks

Mike

 

 

[The Zip]

Tell me you are not still driving that truck, a fuel leak that close to your exhaust pipe is BIG trouble.

[newdude]

Hey guys just in the past couple days I have noticed a fuel smell on the drivers side of my truck. Today I looked underneath the truck and found fuel leaking on the side of the tank, not a ton but you can see it by looking through the side of the tank plastic cover. I have also developed an issue with it starting funny in the past couple days to. I will turn the key over and the starter will engage even if I turn the key back just a little, don't know if that is a separate issue or one cause by fuel issue too?

 

Thanks

Mike

 

 

 

Sounds like the tank needs to be dropped (or pull the bed) to get a better view. If it has a metal top to the sending unit, the metal pressure line elbow could be rusted and leaking. Could be an issue with the nylon line as well.

[Jsdirt]

Since your in MI, I vote rusted lines too. Sometimes they make it 10 years ... but sometimes not.

[Doug_Scott]

In regards to the cranking issue, if you are saying that you can turn the key to the start position, and then while engine is cranking, turn the key back to the run position, the starter will still be cranking the engine over, that is actually normal. You can turn the key to start and immediately let it go, the key will return to the run position, and the engine will continue to crank over until it starts. GMs have done this at least 10 years now. My '04 GrandAm did it, as did my '08 G5 and my '10 GMC.

[Jsdirt]

I never knew that. I always held key until it started. That must also keep the starter from engaging when it's running I would imagine ...

 

Great feature if you ever used a valet. We took our '93 Volvo to a funeral recently, I left it running for the guy ... he gets in & shaves a few teeth off my ring gear, WTF.

 

All these electronics are breeding out the last shreds of common sense society has ...

[Doug_Scott]

I never knew that. I always held key until it started. That must also keep the starter from engaging when it's running I would imagine ...

 

Great feature if you ever used a valet. We took our '93 Volvo to a funeral recently, I left it running for the guy ... he gets in & shaves a few teeth off my ring gear, WTF.

 

All these electronics are breeding out the last shreds of common sense society has ...

 

Don't think it stops you from engaging the starter on a running engine. Never tried it, and I will wait until someone else tries it. Not sure why GM did this, and the first time I noticed it I shut the car off and tried to reproduce it, but the car kept starting faster than I could release the key. Thought I imagined it. Letting go of the key before the car has started is a hard habit to break. One of those muscle memory things I guess. You may have to try it a few times before you can experience it. Next time you are out, try letting go of the key as soon as the starter engages.

 

I never understood how anyone could try to start a car that was already running. Hell, the chimes are going off when you open the door cause the key is in the ignition, the radio is playing, if raining the wipers are wiping, the heater is blowing air, and the biggest indicator going is you can feel the engine when you get in, unless it is one of those cars that I can only look at. If the valet is not car savvy, I can't trust him to be able to park it.

[JohnnyG160]

Hello all, just want to share my experience with this same leaking/cranking issue. I took my 08 Sierra 1500 SLE 5.3 over to a buddy's house who owns a car lift. We started looking around on top of the fuel tank with our smart phones and found that the metal top of the fuel pump was rusting and the pressure line elbow was leaking. Well curiosity got the best of me and I wiggled the pressure line fitting. It didn't take much to snap the rotted elbow. So we dropped the tank and changed the fuel pump.