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.
Automatic Transmission Internal Components (M99)
2009 Chevrolet Tahoe Base, 4.8 CSECTION Automatic Transmission Internal Components (M99)
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2011 GMC Yukon XL, 2011 GMC Yukon, 2011 Chevrolet Tahoe, 2011 Chevrolet Suburban, and 2011 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
Automatic Transmission Internal Components (M99)
| Component Name | Callout |
|---|---|
| Automatic Transmission Auxiliary Fluid Pump | 6 |
| Automatic Transmission Internal Mode Switch (IMS) | 31 |
| Drive Motor with Generator Assembly - 1st Position | 71 |
| Drive Motor with Generator Assembly - 2nd Position | 88 |
| Control Solenoid Valve Assembly | 307 |
| Automatic Transmission Output Shaft Speed (OSS) Sensor | 447 |
RENDER: 1.0x
NO RELATED
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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.