I have a 2012 Sierra WT. I purchased it new in Nov. of 2012. When I have a 1/2 to 3/4 tank of gas it makes a bumping sound when I come to a stop or a slow start. It is loud enough that other's in the truck can hear it and a bump can be felt. The noise is not as loud when the tank is completely full or gets below a 1/2 tank. It has a 30 plus gallon tank and was told there is no baffle in this tank. I have had many trucks over the years and have NEVER heard this kind of noise before. Any ideas
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fuel tank bumping noise
- Thread starter Jackie59
- Start date
GMC Customer Service
New member
I have a 2012 Sierra WT. I purchased it new in Nov. of 2012. When I have a 1/2 to 3/4 tank of gas it makes a bumping sound when I come to a stop or a slow start. It is loud enough that other's in the truck can hear it and a bump can be felt. The noise is not as loud when the tank is completely full or gets below a 1/2 tank. It has a 30 plus gallon tank and was told there is no baffle in this tank. I have had many trucks over the years and have NEVER heard this kind of noise before. Any ideas
Hello Jackie59,
I am sorry to hear that you are experiencing an issue with your vehicle. Private message me if I can be of any assistance.
Safe travels,
Jennifer T.
GM Customer Care
I have a 2012 Sierra WT. I purchased it new in Nov. of 2012. When I have a 1/2 to 3/4 tank of gas it makes a bumping sound when I come to a stop or a slow start. It is loud enough that other's in the truck can hear it and a bump can be felt. The noise is not as loud when the tank is completely full or gets below a 1/2 tank. It has a 30 plus gallon tank and was told there is no baffle in this tank. I have had many trucks over the years and have NEVER heard this kind of noise before. Any ideas
Were you able to get any resolution or answer to this? I recently purchased a 2013 Sierra SLE and am experiencing the exact same thing.