Fits: 2001 thru 2025 Chevy Silverado/GMC Sierra 2500HD/3500HD LB7/LLY/LBZ/LMM/LML/L5P Duramax Diesel 

Recommended to replace when installing a Cognito lift kit if you have a 2-piece rear driveline, typical of most crew cab long bed trucks and some crew cab short beds.

• 2-3" Spacer is for a Cognito 4-6" lift
• 3-4" Spacer is for a Cognito 7-9" lift

Warranty:

• Cognito Warranty Registration