Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSGMC2010SAVANA G2500, VAN CARGO EXTENDED, 6.6 6REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 29 (AUTOMATIC TRANSMISSION - ALLISON - DIAGNOSIS)
2010 GMC Savana G2500, Van Cargo Extended, 6.6 6
Section 29 (Automatic Transmission - ALLISON - Diagnosis)
2010 GMC Savana G2500, Van Cargo Extended, 6.6 6SECTION Section 29 (Automatic Transmission - ALLISON - Diagnosis)
WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
- Application
- Identification
- Description & Operation
- Programming
- Trouble Shooting
- Performance Tests
- Self-Diagnostic System
- Diagnostic Tests
- DTC P0218: Transmission Fluid Over Temperature
- DTC P0500: Vehicle Speed Sensor Circuit
- DTC P0561: Unrealistic Variations In Vehicle System Voltage
- DTC P0562: System Voltage Low
- DTC P0563: System Voltage High
- DTC P0700: Mil Illumination Requested
- DTC P0701: Transmission Control System Performance
- DTC P0703: Brake Switch Circuit
- DTC P0708: Transmission Range Sensor Circuit High Input
- DTC P0711: Transmission Fluid Temperature Sensor Circuit - Performance
- DTC P0712: Transmission Fluid Temperature Sensor Circuit - Low Input (High Temperature)
- DTC P0713: Transmission Fluid Temperature Sensor Circuit - High Input (Low Temperature)
- DTC P0716: Turbine Speed Sensor Circuit - Performance
- DTC P0717: Turbine Speed Sensor Circuit - No Signal
- DTC P0721: Output Speed Sensor Circuit - Performance
- DTC P0722: Output Speed Sensor Circuit - No Signal
- DTC P0726: Engine Speed Sensor Circuit - Performance
- DTC P0727: Engine Speed Sensor Circuit - No Signal
- DTC P0731: Incorrect 1ST Gear Ratio
- DTC P0732: Incorrect 2ND Gear Ratio
- DTC P0733: Incorrect 3RD Gear Ratio
- DTC P0734: Incorrect 4TH Gear Ratio
- DTC P0735: Incorrect 5TH Gear Ratio
- DTC P0736: Incorrect Reverse Ratio
- DTC P0741: Torque Converter Clutch System Stuck Off
- DTC P0742: Torque Converter Clutch System Stuck On
- DTC P0743: Torque Converter Clutch - Electrical
- DTC P0746: Solenoid "A" Controlled Clutch Stuck Off
- DTC P0747: Solenoid "A" Controlled Clutch Stuck On
- DTC P0748: Pressure Control Solenoid "A" Electrical
- DTC P0763: Shift Solenoid "C" Electrical
- DTC P0768: Shift Solenoid "D" Electrical
- DTC P0773: Shift Solenoid "E" Electrical
- DTC P0776: Solenoid "B" Controlled Clutch Stuck Off
- DTC P0777: Solenoid "B" Controlled Clutch Stuck On
- DTC P0778: Pressure Control Solenoid "B" Electrical
- DTC P0836: 4-Wheel Drive Low Switch Circuit Malfunction
- DTC P0840: Pressure Switch Solenoid "C" Circuit Malfunction
- DTC P0841: Pressure Switch Solenoid "C" Circuit Stuck Open
- DTC P0842: Pressure Switch Solenoid "C" Circuit Stuck Closed
- DTC P0843: Pressure Switch Solenoid "C" Circuit High
- DTC P0845: Pressure Switch Solenoid "D" Circuit Malfunction
- DTC P0846: Pressure Switch Solenoid "D" Circuit Stuck Open
- DTC P0847: Pressure Switch Solenoid "D" Circuit Stuck Closed
- DTC P0848: Pressure Switch Solenoid "D" Circuit High
- DTC P0870: Pressure Switch "E" Circuit Malfunction
- DTC P0871: Pressure Switch Solenoid "E" Circuit Stuck Open
- DTC P0872: Pressure Switch Solenoid "E" Circuit Stuck Closed
- DTC P0873: Pressure Switch Solenoid "E" Circuit High
- DTC P0875: Reverse Pressure Switch Circuit Malfunction
- DTC P0876: Reverse Pressure Switch Circuit Stuck Open
- DTC P0880: TCM Power Input Signal
- DTC P1571: TCS PWM Circuit No Frequency (8.1L)
- DTC P1688: Unmanaged Engine Torque Delivered To TCM
- DTC P1779: Engine Torque Delivered To TCM
- DTC U2105: Can Bus Pcm Error
- DTC P2810
- Removal & Installation
- Torque Specifications
- Electronic Component Specifications
- Connector Identification
- Wiring Diagrams
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.