humming noise heard underneath gmc sierra 2011 could it be tranny

Asked by Dec 28, 2014 at 11:18 AM about the 2011 GMC Sierra 1500 Work Truck LB

Question type: Maintenance & Repair

4 Answers

Check the u joints could b goin bad just had to change mine in my95 gm Sierra make shore u look at both unions real well easy to miss

Plastic on bearing caps will look cracked or even out of place like sticking out

Noise heard at idle or while drivn

2 of 2 people found this helpful.

Fuel pump may also b makn noise

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