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 MANUALSCHEVROLET2008EXPRESS 2500 V8-4.8LREPAIR AND DIAGNOSISTRANSMISSION AND DRIVETRAINAUTOMATIC TRANSMISSION/TRANSAXLETRANSMISSION TEMPERATURE SENSOR/SWITCHLOCATIONS
2008 Chevrolet Express 2500 V8-4.8L
Transmission Temperature Sensor/Switch: Locations
2008 Chevrolet Express 2500 V8-4.8LSECTION Locations
Automatic Transmission Electronic Component Views
Automatic Transmission Internal Electronic Components (4L80-E)
Automatic Transmission Internal Electronic Components (4L80-E):
22a - Automatic Transmission (AT) Input (Shaft) Speed Sensor (ISS) Assembly
22b - Automatic Transmission (AT) Output (Shaft) Speed Sensor (OSS) Assembly
34 - Automatic Transmission Fluid Temperature (TFT) Sensor
40 - Automatic Transmission Fluid Pressure (TFP) Manual Valve Position Switch
311 - 2-3 Shift Solenoid (SS) Valve Assembly
313 - 1-2 Shift Solenoid (SS) Valve Assembly
320 - Pressure Control (PC) Solenoid Valve Assembly
323 - Torque Converter Clutch Pulse Width Modulation (TCC PWM) Solenoid Valve Assembly
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.