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 MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 191 (AUTOMATIC TRANSMISSION SERVICING)IDENTIFICATIONTRANSMISSION
2003 Chevrolet TrailBlazer 4.2 S, 4WD
Section 191 (Automatic Transmission Servicing): Identification: Transmission
2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Transmission
WARNING: This page is about a different car, the 2003 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
The transmission identification number is located behind the oil pan. See Fig 1 . For ID number breakdown, see IDENTIFICATION NUMBER SYSTEM table.
IDENTIFICATION NUMBER SYSTEM
| Position | Definition | Character | Description |
|---|---|---|---|
| 1 | Model Year | 3 | 2003 |
| 2 | Model | CA | Corvette |
| 3 | Transmission Type | D | RPO M30, HYDRA-MATIC 4L60-E |
| 4 | Julian Date | 187 | Day Of Year |
| 5 | Shift Built | A, B, J-First Shift; C, H, W-Second Shift | ..... |
| 6 | Serial No. | 16588320 | ..... |
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.