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 1882 (AUTOMATIC TRANSMISSION - 6L90 - DESCRIPTION AND OPERATION)
2010 GMC Savana G2500, Van Cargo Extended, 6.6 6
Section 1882 (Automatic Transmission - 6L90 - Description And Operation)
2010 GMC Savana G2500, Van Cargo Extended, 6.6 6SECTION Section 1882 (Automatic Transmission - 6L90 - Description And Operation)
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2011 GMC Savana Special, 2011 GMC Savana Camper Special, 2011 GMC Savana, 2011 Chevrolet RV Cutaway, and 2011 Chevrolet Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
- Description and Operation
- Definitions and Abbreviations
- Transmission Identification Information
- Transmission General Description
- Transmission Component and System Description
- Shift Stabilization Description and Operation
- Tow/Haul Mode Description and Operation
- Transmission Adaptive Functions
- Transmission Indicators and Messages
- Electronic Component Description
- Automatic Transmission Inline 16-Way Connector Description
- Automatic Transmission Hydraulic Diagrams
- Fluid Passages
- Torque Converter Housing- Fluid Pump Cover Side
- Fluid Pump Cover- Torque Converter Housing Side
- Fluid Pump Cover - Case Side
- Case- Top Channel Plate Side
- Control Valve Upper Body Assembly - Case Side
- Control Valve Upper Body Assembly - Bottom Channel Plate Side
- Control Valve Upper Body Assembly - Control Solenoid Valve Assembly Side
- Control Valve Lower Body Assembly - Control Valve Upper Body Assembly Side
- Control Valve Body Spacer Plate Assembly - Bottom Channel Plate Side
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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.