Section 21 (Automatic Transmission - 8L90 (M5U) - Diagnostic Information And Procedures)
WARNING: This page is about a different car, the 2018 Chevrolet Suburban 3500 HD. However, it is still accessible from the selected car via links, so may be relevant.
- Diagnostic Information And Procedures
- DTC P0601, P0602, P0603, P0604, P0606, P062F, P16F3, P16F4, Or P16FB: Control Module
- DTC P0658, P0659, P2670, Or P2671: Actuator High Control Circuit Group 1/2
- Diagnostic Instructions
- DTC Descriptor
- Diagnostic Fault Information
- Circuit/System Description
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Actions Taken When the DTC Sets
- Conditions for Clearing the DTC
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Component Testing
- Repair Instructions
- DTC P0711, P0712, Or P0713: Transmission Fluid Temperature Sensor
- Diagnostic Instructions
- DTC Descriptor
- Diagnostic Fault Information
- Typical Scan Tool Data
- Circuit/System Description
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Actions Taken When the DTC Sets
- Conditions for Clearing the DTC
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Component Testing
- Repair Instructions
- DTC P0716, P0717, P07BF, Or P07C0: Input Speed Sensor
- Diagnostic Instructions
- DTC Descriptor
- Diagnostic Fault Information
- Typical Scan Tool Data
- Circuit/System Description
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Actions Taken When the DTC Sets
- Conditions for Clearing the DTC
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Repair Instructions
- DTC P071A: Transmission Tow Mode Switch Circuit
- Diagnostic Instructions
- DTC Descriptor
- Diagnostic Fault Information
- Typical Scan Tool Data
- Circuit/System Description
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Actions Taken When the DTC Sets
- Conditions for Clearing the DTC
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Component Testing
- Repair Instructions
- DTC P0722, P0723, P077C, Or P077D: Output Speed Sensor Circuit
- Diagnostic Instructions
- DTC Descriptor
- Diagnostic Fault Information
- Typical Scan Tool Data
- Circuit/System Description
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Actions Taken When the DTC Sets
- Conditions for Clearing the DTC
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Repair Instructions
- DTC P0746 Or P0747: Transmission Control Solenoid Valve 1 Stuck
- DTC P0776 Or P0777: Transmission Control Solenoid Valve 2 Stuck
- DTC P0796 Or P0797: Transmission Control Solenoid Valve 3 Stuck
- DTC P0815, P0816, Or P0826: Up And Down Shift Switch Circuit
- Diagnostic Instructions
- DTC Descriptors
- Diagnostic Fault Information
- Circuit/System Description
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Action Taken When the DTC Sets
- Conditions for Clearing the DTC
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Component Testing
- Repair Instructions
- DTC P0851: Park/Neutral Position Switch Circuit Low Voltage
- Diagnostic Instructions
- DTC Descriptor
- Diagnostic Fault Information
- Typical Scan Tool Data
- Circuit/System Description
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Actions Taken When the DTC Sets
- Conditions for Clearing the DTC
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Component Testing
- Repair Instructions
- DTC P0960, P0962, P0962, P0964, P0966, P0967, P0968, P0970, P0971, P2736, P2738, P2739, P2812, P2814, P2815, P2824, P2826, Or P2827: Transmission Control Solenoid Valve 1, 2, 3, 6, 7, 9 Control Circuit(s)
- Diagnostic Instructions
- DTC Descriptor
- Diagnostic Fault Information
- Typical Scan Tool Data
- Circuit/System Description
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Actions Taken When the DTC Sets
- Conditions for Clearing the DTC
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Component Testing
- Repair Instructions
- DTC P175F: Acceleration Sensor Signal Message Counter Incorrect
- DTC P1761: Up And Down Shift Switch Signal Message Counter Incorrect
- DTC P1762: Transmission Mode Switch Signal Message Counter Incorrect
- DTC P176B, P176C, P176D: Intermediate Speed Sensor Circuit
- Diagnostic Instructions
- DTC Descriptor
- Diagnostic Fault Information
- Typical Scan Tool Data
- Circuit/System Description
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Actions Taken When the DTC Sets
- Conditions for Clearing the DTC
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Repair Instructions
- DTC P1824, P182D, P18B8, P18BD, Or P18C2: Internal Mode Switch P Circuit
- Diagnostic Instructions
- DTC Descriptors
- Diagnostic Fault Information
- Typical Scan Tool Data
- Circuit/System Description
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Action Taken When the DTC Sets
- Conditions for Clearing the DTC
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Component Testing
- Repair Instructions
- DTC P182A, P1838, P18B5, P18BA, Or P18BF: Internal Mode Switch A Circuit
- Diagnostic Instructions
- DTC Descriptors
- Diagnostic Fault Information
- Typical Scan Tool Data
- Circuit/System Description
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Action Taken When the DTC Sets
- Conditions for Clearing the DTC
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Component Testing
- Repair Instructions
- DTC P182B, P182C, P18B6, P18BB, Or P18C0: Internal Mode Switch B Circuit
- Diagnostic Instructions
- DTC Descriptors
- Diagnostic Fault Information
- Typical Scan Tool Data
- Circuit/System Description
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Action Taken When the DTC Sets
- Conditions for Clearing the DTC
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Component Testing
- Repair Instructions
- DTC P182E Or P1915: Internal Mode Switch
- Diagnostic Instructions
- DTC Descriptors
- Diagnostic Fault Information
- Typical Scan Tool Data
- Circuit/System Description
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Action Taken When the DTC Sets
- Conditions for Clearing the DTC
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Component Testing
- Repair Instructions
- DTC P182F, P1839, P18B7, P18BC, Or P18C1: Internal Mode Switch C Circuit
- Diagnostic Instructions
- DTC Descriptors
- Diagnostic Fault Information
- Typical Scan Tool Data
- Circuit/System Description
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Action Taken When the DTC Sets
- Conditions for Clearing the DTC
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Component Testing
- Repair Instructions
- DTC P1840, P1841, P18B9, P18BE, Or P18C3: Internal Mode Switch S Circuit
- Diagnostic Instructions
- DTC Descriptors
- Diagnostic Fault Information
- Typical Scan Tool Data
- Circuit/System Description
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Action Taken When the DTC Sets
- Conditions for Clearing the DTC
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Component Testing
- Repair Instructions
- DTC P2714 Or P2715: Transmission Control Solenoid Valve 4 Stuck
- DTC P2723 Or P2724: Transmission Control Solenoid Valve 5 Stuck
- DTC P2718, P2720, P2721, P2727, P2729, P2730, P281D, Or P281E: Transmission Control Solenoid Valve 4/5/8 Control Circuit(s)
- Diagnostic Instructions
- DTC Descriptor
- Diagnostic Fault Information
- Typical Scan Tool Data
- Circuit/System Description
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Actions Taken When the DTC Sets
- Conditions for Clearing the DTC
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Component Testing
- Repair Instructions
- DTC P27A7, P27A8, P27A9, P27AA, P27AB, P27AC, P27AD: Transmission Control Solenoid Valve (1-7) Calibration
- DTC P2808 Or P2809: Transmission Control Solenoid Valve 7 Stuck
- DTC P2817 Or P2818: Transmission Control Solenoid Valve 8 Stuck
- Solenoid Valve Characterization Reprogramming
- Symptoms - Automatic Transmission
- Tow/Haul Switch/Indicator Malfunction
- Transmission Fluid Level And Condition Check
- Transmission Fluid Fill Procedure
- Road Test
- Torque Converter Diagnosis
- Torque Converter Stator
- Poor Acceleration at Low Speed - Stator Roller Clutch Freewheels at All Times
- Poor Acceleration at High Speed - Stator Roller Clutch is Locked Up at All Times
- Torque Converter Bearing Noise
- Torque Converter Clutch
- Torque Converter Clutch Shudder
- If Shudder Occurs During TCC Apply, Release, and ECCC
- If Shudder Occurs After TCC has Locked
- Torque Converter Vibration Test
- Isolating Vibration
- Indexing Torque Converter
- Flex Plate/Torque Converter Vibration Test
- Bushing And Mating Shaft Inspection
- Vibration
- Noise And Vibration Analysis
- Whine/Growl Noise That Changes With Vehicle Speed
- Clutch Plate Diagnosis
- Engine Coolant/Water In Transmission
- Fluid Leak Diagnosis
- Case Porosity Repair
- Automatic Transmission Fluid Leaks
- Shift Indicator Indicates Wrong Gear Selection
- No Park Or Drive
- Harsh Garage Shift
- No Drive In All Ranges
- Harsh, Soft, Delayed Or Slipping First, Third, Fifth, Sixth Or Seventh Shift
- No First, Third, Fifth, Sixth Or Seventh Gear
- Harsh, Soft, Delayed Or Slipping Second, Third, Fourth, Sixth Or Eighth Shift
- No Second, Third, Fourth, Sixth Or Eighth Gear
- Harsh, Soft, Delayed Or Slipping Fourth, Fifth, Sixth, Seventh, Eighth, Or Reverse Shift
- No Fourth, Fifth, Sixth, Seventh, Eighth Or Reverse Gear
- Harsh, Soft, Delayed Or Slipping First, Second, Seventh, Eighth, Or Reverse Shift
- No First, Second, Seventh, Eighth Or Reverse Gear
- Harsh, Soft, Delayed Or Slipping First, Second, Third, Fourth, Fifth, Or Reverse Shift
- No First, Second, Third, Fourth, Fifth Or Reverse Gear
- No Torque Converter Clutch Apply
- No Torque Converter Clutch Release