The 6L XX family is a series of 6-speed longitudinally-mounted automatic transmissions produced by General Motors.

Jul 7, 2025 · If you’re driving a 2009–2021 Silverado 1500 or Sierra 1500 with the 5.3L or 6.2L V8, chances are high you’ve got a 6L80. These trucks make up the lion’s share of failure reports, …

The 6L80 denotes that the transmission is a 6-Speed, Longitudinally mounted, and for 8000 lbs. vehicle weights. It's RPO code is "MYC" and it is domestically manufactured in GM's Ypsilanti, …

6L80E Transmissions - Durable, reliable, and ready for action. Perfect for Silverado, Tahoe, Suburban, Sierra, and Yukon.

Jan 14, 2021 · The 6L80 and 6L90 transmissions have become the most popular rear-wheel drive GM transmissions in most of our shops. We have seen several patterned failures, written …

Compatible with heavy-duty applications, this 6L80E is designed to fit vehicles like the Cadillac XLR-V (2006–2009), STS-V / STS (2007–2009), Escalade series (2007–2015), Chevrolet …

Please view our GM 6L80/90E product information below to learn more about some of the quality processes we perform to this transmission family.

Mar 5, 2025 · Discover everything you need to know about 6L80 transmission upgrades, including performance enhancements, common issues, and expert tips for optimal results.

Mar 27, 2025 · The family includes the 6L45, 6L50, 6L80/6L90 and 6L80E/6L90E. In this article we’ll provide comprehensive information about these transmissions, especially the popular …

Jan 13, 2015 · Introduced in 2006, the 6L80 is a popular, 6-speed, RWD transmission produced for more than 8 million trucks, SUVs and cars. It's used by GM in about 20 models, most …