GM Hydra-Matic 6L50

6L50 Automatic Transmission Specs, Ratios, & Information

General Motor's Hydra-Matic 6L50 six speed automatic transmission was first introduced for the 2006 model year as a replacement for the five speed 5L50. The transmission is found behind 2015 to present model year Chevrolet Colorado and GMC Canyon midsize pickups equipped with the 2.8L Duramax diesel. The transmission features a relatively low 4 to 1 first gear ratio and a relatively high 0.67 to 1 final overdrive ratio, resulting in favorable gear multiplication at low vehicle speeds while minimizing engine rpm at cruising speeds. In 2.8L Duramax Colorado/Canyon applications, the transmission's shift schedule and ratio spread help GM's midsize pickups achieve more than 30 mpg on the highway.

GM 6L50 Ratios








4.065 : 1

2.371 : 1

1.551 : 1

1.157 : 1

0.853 : 1

0.674 : 1

3.20 : 1


GM 6L50 Specs


General Motors Hydra-Matic 6L50


6 speed automatic


General Motors 5L50

Production Plant(s):

• GM Strasbourg Plant, Strasbourg, France
• Toledo Transmission Plant, Toledo, Ohio
• Silao Transmission Plant, Silao, Mexico

Model Years/Applications:

• 2006 - present model year GMC, Chevrolet 2.0L - 4.6L gas engines
• 2015 - present 2.8L Duramax Chevrolet Colorado, GMC Canyon

Case Material:

3 piece aluminum case

Max Input Torque:

480 lb-ft

Max GVWR*:

6,613 lbs

Max GCWR*:

12,505 lbs

Max Shift Speed:

4,400 rpm (2.8L diesel only)


Approx. 187 - 198 lbs w/ fluid

ATF Type/Spec:


Service Intervals:

Replace transmission fluid and filter at 45,000 mile intervals if operation falls under "severe" service category**


• Fully electronic sequence, 7 electric shift solenoids

• Bandless, modular transmission design

• Designed for longitudinally mounted engine configurations, rear and all wheel drive applications

• Production code MYB

• Torque converter equipped with centrifugal pendulum vibration absorber (CPVA) for transmission noise and vibration control

*Maximum validated GVWR and GCWR listed - transmission may be adequate in applications with greater ratings.
**Transmission service intervals not published under "normal" service procedures; "severe" service refers to vehicles that have been used to tow frequently, have been driven primarily in heavy city traffic during hot weather, or that have been driven primarily in hilly/mountainous terrain. Refer to owner's manual for additional service information.