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Loud Knock On Cold Start


bell_man

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Posted

My 2007 Silverado 4.8L 2wd NNBS is making a knocking noise from under the truck on cold start up. It goes away after I get going. Sounds like it coming from the exhaust. Any ideas? If it is the exhaust would that be covered under the powertrain?

  • 2 weeks later...
Posted
My 2007 Silverado 4.8L 2wd NNBS is making a knocking noise from under the truck on cold start up. It goes away after I get going. Sounds like it coming from the exhaust. Any ideas? If it is the exhaust would that be covered under the powertrain?

 

 

anyone got a guess

Posted

I'd help out if I could but instead I'll offer a bump.

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