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 MANUALSCHEVROLET2012CHEVY EXPRESS G2500, VAN PASSENGER, 4.8L ENG VIN AREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1230 (AUTOMATIC TRANSMISSION - 4L60-E/4L65-E/4L70-E - INTRODUCTION (2 OF 2))
2012 Chevrolet Chevy Express G2500, Van Passenger, 4.8L Eng VIN A
Section 1230 (Automatic Transmission - 4L60-E/4L65-E/4L70-E - Introduction (2 Of 2))
2012 Chevrolet Chevy Express G2500, Van Passenger, 4.8L Eng VIN ASECTION Section 1230 (Automatic Transmission - 4L60-E/4L65-E/4L70-E - Introduction (2 Of 2))
WARNING: This page is about a different car, the 2008 GMC Yukon XL, 2008 GMC Yukon, 2008 Chevrolet Tahoe, 2008 Chevrolet Suburban, and 2008 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
- Specifications
- Transmission Fluid Temperature Sensor Specifications
- Fastener Tightening Specifications
- Transmission General Specifications
- Fluid Capacity Specifications
- End Play Specifications
- Low and Reverse Clutch Spacer Plate Selection
- Forward Clutch Backing Plate Selection
- Third and Fourth Clutch Backing Plate Selection
- Reverse Input Clutch Backing Plate Selection
- Fluid Pump Rotor and Slide Measurement
- Torque Converter End Play Specifications
- 2-4 Band Servo Piston Pin Selection
- Range Reference
- Shift Solenoid Valve State and Gear Ratio
- Shift Speed
- Transmission Fluid Pressure Manual Valve Position Switch Logic
- Transmission Range Switch Logic
- Line Pressure
- Component Resistance
- Schematic and Routing Diagrams
- Component Locator
- Diagnostic Information and Procedures
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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.