Transfer Case Vent | 2001 - 2010

This transfer case vent replaces GM 25892279 on 2001-2010 Chevy Silverado and GMC Sierra 2500HD and 3500HD trucks with the LB7, LLY, LBZ and LMM 6.6L Duramax. The vent lets the transfer case breathe as it heats and cools, which equalizes internal pressure, and helps keep dirt and water out.

Features

• Replaces GM 25892279
• Fits 2001-2010 Silverado and Sierra 2500HD and 3500HD with the LB7, LLY, LBZ and LMM Duramax

When to Replace It

Replace the vent if it is worn, damaged or missing, or any time it comes off during transfer case service.

Frequently Asked Questions

Is this a transmission vent?
GM lists 25892279 as a multi-purpose vent, and its catalog shows it as the transfer case vent on these trucks. Check your truck before ordering if you need a vent for another location.

For warranty information or to submit a claim, see our Warranty Form.