SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 998 (RETAINED ACCESSORY POWER SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESRETAINED ACCESSORY POWER (RAP) INOPERATIVE
2003 Chevrolet TrailBlazer 4.2 S, 4WD

Retained Accessory Power (RAP) Inoperative

2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Retained Accessory Power (RAP) Inoperative
WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Retained Accessory Power (RAP) Inoperative

Step Action Yes No
Schematic Reference: Data Link Connector (DLC) Schematics in Data Link Communications
Connector End View Reference:  Master Electrical Component List  in Wiring Systems 
1 Did you perform the Diagnostic System Check - Retained Accessory Power? Go to Step 2  Go to Diagnostic Starting Point - Retained Accessory Power 
2
  1. Install a scan tool. Select diagnostic circuit check and then class 2 power mode.
  2. Close all the doors.
  3. Turn ON the ignition, with the engine OFF.
  4. Wait 5 seconds then turn the ignition OFF.
  5. Wait the time-out for retained accessory power (RAP).
Did the scan tool display the RAP power mode, then time-out and display Off-Awake power mode?		 Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems Go to Step 3 
3 Inspect for poor connections at the harness connector of the body control module (BCM). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 5  Go to Step 4 
4
IMPORTANT: Perform the module setup procedure if required.
Replace the BCM. Refer to Control Module References in Body Control System.Did you complete the procedure?		 Go to Step 5  -
5 Operate the system in order to verify the repair.
Did you correct the condition?		 System OK Go to Step 2 
RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

Shop Manual-Ready ToolsFree Quote CheckQuote Shield Pro

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.