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.
2003 GMC Sierra 1500 HD, RWDFACTORY OEM SERVICE PROCEDURE
Fluid Temperature Sensor: Remove & Replace
WARNING: This page is about the Sierra 1500, 2D Pickup, 4.3 X, 4WD, Automatic, Automatic, which is a different variant/trim than selected.
TRANS ID - 4L80E
| Applies To | Note | Standard Hours | Warranty Hours | Skill Level |
|---|---|---|---|---|
| w/o Skid Plate | 1.4 | B | ||
| w/Skid Plate | 1.7 | B |
TRANS ID - 700-R4, 4L60, 4L60E, 4L65E, 4L70E
Includes: R&I Oil Pan.| Applies To | Note | Standard Hours | Warranty Hours | Skill Level |
|---|---|---|---|---|
| 1.2 | B | |||
| Additional Procedure: FLUID TEMPERATURE SENSOR: Remove & Replace: | ||||
| w/Skid Plate add | 0.3 | B | ||
TRANS ID - ALLISON LCT 1000
| Applies To | Note | Standard Hours | Warranty Hours | Skill Level |
|---|---|---|---|---|
| Includes: Perform Tech2 "FastLearn" procedure. Includes: Confirm Fluid temperature for level check. | 2.8 | 1.1 | B |
Factory Service Tools
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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.