4L80E Zip Kit Valve Body Repair 1991-2013 34774A Sonnax

Sonnax Zip Kit 4L80E Valve Body Repair

Specifications

• Corrects common shift quality complaints
• Fits 1991-2013 GM Silverado/Sierra 2500/3500, Express/Savana, Suburban, Hummer H1/H2
• Complete instructions included
• Professional installation recommended
• Improves shift firmness and timing

Quality & Service

Meets or exceeds OEM specifications. Professional installation recommended.Core Transmission Supply stocks only trusted brands and thoroughly inspected components to ensure your rebuild goes smoothly.

Professional installation recommended. Contact us for technical questions about fitment and compatibility.