Keep your 2004.5-2005 Chevy/GMC 6.6L LLY Duramax driving as it should with a new Driveshaft for your vehicle. Drivability issues like vibration, clunking sounds while shifting, or a clicking or knocking noise could be signs of a failing u-joint or damaged driveshaft. To ensure your lifted truck continues to drive smoothly, manufacturers like Cognito offer driveshafts specifically for lifted applications. Get the replacement driveshaft your vehicle needs from manufacturers like Dorman, USA Standard Gear, and more.