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 531 (CHARGING SYSTEM)ON-VEHICLE TESTINGBATTERY SPECIFICATIONS
2003 Chevrolet TrailBlazer 4.2 S, 4WD
Battery Specifications
2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Battery Specifications
WARNING: This page is about a different car, the 2002 Pontiac Grand Prix. However, it is still accessible from the selected car via links, so may be relevant.
BATTERY SPECIFICATIONS
| Application | Specification | |
|---|---|---|
| 3.1L Engine (GM P/N 19001810) | ||
| Replacement Battery Number | 78-6YR | |
| Cold Cranking Amps | 600 Amps | |
| Reserve Capacity Rating | 115 Minutes | |
| 3.8L W/O Supercharger (GM P/N 19001812) | ||
| Replacement Battery Number | 78-7YR | |
| Cold Cranking Amps | 690 Amps | |
| Reserve Capacity Rating | 115 Minutes | |
| 3.8L W/Supercharger (GM P/N 19001814) | ||
| Replacement Battery Number | 78-7YR | |
| Cold Cranking Amps | 770 Amps | |
| Reserve Capacity Rating | 115 Minutes | |
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.