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Harsh shift or shift concerns on a 2018 GMC Sierra check this video out before you change fluid
FIX Gmc/chevy 8 speed trans slip/shutter FIX
GMC Sierra 8 speed shudder and hard shifting fixes (Lubegard and Trifecta)
Transmission Service trick GMC & Chevy Trucks & SUVs
SYMPTOMS OF A BAD TRANSMISSION SHIFT SOLENOID
Why Does My Transmission Shift Hard? VIDEO
8 Speed Torque Converter Shudder... Fluid Exchange
How We Fix GM Transmission Failure (6L80 & 6L90)
2017 GMC Sierra 6.2L. 8L90 Transmission Issues.
OWNER REVIEWS! GMC Sierra 2014 - 2018 COMMON PROBLEMS RELIABILITY PROBLEMS MAINTENANCE TOP PROBLEMS
4L60E Transmission Hard Shift? Check This first!
8 Symptoms of a Bad Shift Solenoid
