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 98 (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 does not describe the selected car, but rather 6 other vehicles, including the 2002 GMC Savana Special, 2002 GMC Savana Camper Special, 2002 GMC Savana, 2002 Chevrolet RV Cutaway, and 2002 Chevrolet Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
BATTERY SPECIFICATIONS
| Application | Specification | |
|---|---|---|
| Standard (GM P/N 19001810) | ||
| Replacement Battery Number | 78-6YR | |
| Cold Cranking Amps | 600 Amps | |
| Reserve Capacity Rating | 115 Minutes | |
| YF2 (Ambulance Upfitter) Option (GM P/N 19001812) | ||
| Replacement Battery Number | 78-7YR | |
| Cold Cranking Amps | 690 Amps | |
| Reserve Capacity Rating | 115 Minutes | |
| 8Y9 (Dual Batteries) Option (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.