GM Service Manual Online
For 1990-2009 cars only
Makes
🢒
HUMMER
🢒
2008
🢒
H2
🢒
Transmission/Transaxle
🢒 Automatic Transmission - 6L50/6L80/6L90
Transmission/Transaxle
All Component Locator
Automatic Transmission Electronic Component Views
Ball Check Valve Locations
Bushing, Bearing, and Washer Locations
Component Location
Disassembled Views
Fluid Passages
Seal Locations
All Description and Operation
Automatic Transmission Inline 16-Way Connector Description
Definitions and Abbreviations
Drive Range - Fourth Gear
Drive Range, Fifth Gear
Drive Range, Fifth Gear Default
Drive Range, First Gear
Drive Range, First Gear Engine Braking
Drive Range, Second Gear
Drive Range, Sixth Gear
Drive Range, Third Gear
Drive Range, Third Gear Default
Electronic Component Description
Neutral - Engine Running
Park - Engine Running
Reverse
Shift Stabilization Description and Operation
Tow/Haul Mode Description and Operation
Transmission Adaptive Functions
Transmission Component and System Description
Transmission General Description
Transmission Identification Information
Transmission Indicators and Messages
All Special Tools and Equipment
Special Tools
Cleaning, Inspection, and Adjustment
1-2-3-4 Clutch Backing Plate Retaining Ring Measurement
3-5 Reverse Clutch Backing Plate Retaining Ring Measurement
4-5-6 Clutch Backing Plate Retaining Ring Measurement
Case Inspection
Control Valve Lower Body Assembly Cleaning and Inspection
Control Valve Upper Body Assembly Cleaning and Inspection
Fluid Pump Cover Cleaning and Inspection
Fluid Pump Selective Measurement
Low and Reverse Clutch Backing Plate Retaining Ring Measurement
Range Selector Lever Cable Adjustment
Torque Converter Housing Cleaning and Inspection
Transmission Mount Inspection
Diagnostic Procedures
Automatic Transmission Fluid Leaks
Bushing and Mating Shaft Inspection
Case Porosity Repair
Control Solenoid Valve and Transmission Control Module Assembly Cleaning
Control Solenoid Valve and Transmission Control Module Assembly Input Shaft Speed/Output Shaft Speed Input Test
Control Solenoid Valve and Transmission Control Module Assembly Inspection
Control Solenoid Valve and Transmission Control Module Assembly Solenoid Performance Test
Diagnostic Starting Point - Automatic Transmission
Flex Plate/Torque Converter Vibration Test
Fluid Leak Diagnosis
Fluid Pressure High or Low
Harsh Garage Shift
Harsh, Soft, Delayed or Slipping 1-2-3-4 Shift
Harsh, Soft, Delayed or Slipping 4-5-6 Shift
Harsh, Soft, Delayed or Slipping First or Reverse Gear
Harsh, Soft, Delayed or Slipping Second or Sixth Gear
Harsh, Soft, Delayed or Slipping Third, Fifth, or Reverse Gear
Line Pressure Check
No Drive in All Ranges
No Drive or Reverse Gear
No First and Reverse Gears
No First Gear
No First, Second, Sixth, or Reverse Gear
No First, Second, Third, and Fourth Gear
No First, Second, Third, Fourth, Fifth, or Reverse Gear
No Fourth, Fifth, and Sixth Gear
No Park or Drive
No Reverse Gear
No Second and Sixth Gear
No Third, Fifth, and Reverse Gear
No Torque Converter Clutch Apply
No Torque Converter Clutch Release
Noise During 3-4 or 4-3 Shifts
Noise in First or Reverse Gear
Noise in First, Second, Sixth, or Reverse Gear
Noise in First, Second, Third, Fourth, Fifth, or Reverse Gear
Noise in Fourth, Fifth, or Sixth Gear
Noise in Second or Sixth Gear
Road Test
Service Fast Learn Adapts
Stuck in First or Reverse Gear
Stuck in Second or Sixth Gear
Symptoms - Automatic Transmission
Torque Converter Diagnosis
Tow/Haul Switch/Indicator Always On or Inoperative
Transmission Fluid Check
Transmission Fluid Cooler Flushing and Flow Test
Vibration
Vibration in Second, Third, Fourth, Fifth, or Sixth Gear
Whine/Growl Noise That Changes with Vehicle Speed
Diagnostic Trouble Codes
DTC P0218
DTC P0562 or P0563
DTC P0601, P0602, P0603, P0604, or P1621
DTC P0634
DTC P0667, P0668, or P0669
DTC P0711
DTC P0712 or P0713
DTC P0716 or P0717
DTC P0719 or P0724
DTC P0722 or P0723
DTC P0741 or P0742
DTC P0751
DTC P0752
DTC P0756
DTC P0776 or P0777
DTC P0796 or P0797
DTC P0815, P0816, or P0826
DTC P0842 or P0843
DTC P0851 or P0852
DTC P0872 or P0873
DTC P0877 or P0878
DTC P0961-P0963
DTC P0965-P0967
DTC P0969-P0971
DTC P0973 or P0974
DTC P0976 or P0977
DTC P0989 or P0990
DTC P1684-P1686
DTC P1751
DTC P1825 or P1915
DTC P1831 or P1832
DTC P2534
DTC P2714 or P2715
DTC P2719-P2721
DTC P2723 or P2724
DTC P2728-P2730
DTC P2762, P2763, or P2764
Disassembly, Overhaul, Repair, and Assembly
1-2-3-4 and 3-5 Reverse Clutch Assembly and 4-5-6 Clutch Assembly Installation
1-2-3-4 and 3-5 Reverse Clutch Assembly and 4-5-6 Clutch Assembly Removal
1-2-3-4 and 3-5 Reverse Clutch Fluid Seal Ring Installation
1-2-3-4 and 3-5 Reverse Clutch Overhaul
2-6 Clutch Overhaul
4-5-6 Clutch Dampener Overhaul
4-5-6 Clutch Overhaul
Automatic Transmission Electrical Connector Passage Sleeve Installation
Case Extension Assembly Installation
Case Extension Assembly Removal
Center Support, Output Carrier and Output Shaft Installation
Center Support, Output Carrier and Output Shaft Removal
Control Valve Body Assembly Assemble
Control Valve Body Assembly Disassemble
Control Valve Body Assembly Installation
Control Valve Body Assembly Removal
Fluid Filter and Manual Shift Detent Assembly Installation
Fluid Pump Cover Installation
Low and Reverse Clutch Overhaul
Manual Shift Shaft and Parking System Components Overhaul
Manual Shift Shaft Seal Replacement
Output Carrier Assembly Overhaul
Output Carrier to Output Shaft Assemble
Output Shaft Assemble
Output Shaft Disassemble
Output Shaft Seal Replacement
Propeller Shaft Front Slip Yoke Oil Seal Replacement
Torque Converter Fluid Seal Replacement
Torque Converter Housing with Fluid Pump Assemble
Torque Converter Housing with Fluid Pump Disassemble
Torque Converter Housing with Fluid Pump Installation
Torque Converter Housing with Fluid Pump Removal
Torque Converter Installation and Holding Fixture Removal
Torque Converter Removal and Holding Fixture Installation
Transmission Fluid Cooler Pipe Seal Replacement
Transmission Fluid Pan Installation
Transmission Fluid Pan, Filter and Electrical Connector Passage Sleeve Removal
Electrical/Electronic Schematic Diagrams
Automatic Transmission Controls Schematics
General Diagnostic Information
Clutch Plate Diagnosis
Engine Coolant/Water in Transmission
Noise and Vibration Analysis
Mechanical Specifications
Clutch Backing Plate Retaining Ring Specifications
Fastener Tightening Specifications
Fluid Capacity Specifications
Fluid Pump Selective Specifications
Range Reference
Shift Solenoid Valve State and Gear Ratio
Transmission Fluid Pressure Switch Logic
Transmission General Specifications
Other Specifications
Shift Speed
Transmission Internal Mode Switch Logic
Removal, Installation, and Replacement
Automatic Transmission Control Indicator Replacement
Automatic Transmission Electrical Connector Passage Sleeve Replacement
Automatic Transmission Fluid Pressure Test Hole Plug Replacement
Automatic Transmission Fluid, Fluid Pan and/or Filter Replacement
Automatic Transmission Range Selector Lever Replacement
Control Solenoid Valve and Transmission Control Module Assembly Replacement
Control Valve Lower Body and Upper Body Replacement
Input and Output Speed Sensor Replacement
Manual Shift Detent Lever and Park Pawl Actuator Replacement
Manual Shift Shaft and Seal Replacement
Manual Shift Shaft Position Switch Replacement
Range Selector Lever Cable Bracket Replacement
Range Selector Lever Cable Replacement
Transmission Control Bracket Replacement
Transmission Control Lever Knob Replacement
Transmission Control Replacement
Transmission Converter Cover Replacement
Transmission Fluid Auxiliary Cooler Pipe Replacement
Transmission Fluid Auxiliary Cooler Replacement
Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection
Transmission Fluid Cooler Hose/Pipe Replacement
Transmission Fluid Filler Tube and Seal Replacement
Transmission Heat Shield Replacement
Transmission Mount Replacement
Transmission Output Shaft Seal Replacement
Transmission Replacement
Vent Hose Replacement