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 1599 (RETAINED ACCESSORY POWER SYSTEM)
2003 Chevrolet TrailBlazer 4.2 S, 4WD
Section 1599 (Retained Accessory Power System)
2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Section 1599 (Retained Accessory Power System)
WARNING: This page is about a different car, the 2002 Oldsmobile Bravada, 2002 GMC Envoy XL, 2002 GMC Envoy, and 2002 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
- Schematic and Routing Diagrams
- Diagnostic Information and Procedures
- Diagnostic Starting Point - Retained Accessory Power
- Diagnostic System Check - Retained Accessory Power
- Diagnostic Trouble Code (DTC) List
- Symptoms - Retained Accessory Power
- Retained Accessory Power (RAP) On After Timeout (with Relay)
- Retained Accessory Power (RAP) On After Timeout (No Relay, Class 2)
- Retained Accessory Power (RAP) Inoperative (with relay)
- Retained Accessory Power (RAP) Inoperative (No Relay Class 2)
- Description and Operation
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.