Diagnostic Procedures

1997 Chevrolet Chevy Van G2500, Van Cargo Extended, 6.5 FSECTION Diagnostic Procedures
  1. Perform diagnostic system check. See DIAGNOSTIC SYSTEM CHECKΒ  . After performing diagnostic system check, go to next step.
  2. Turn ignition off. Disconnect 2-pin EBCM harness connector. Inspect connector for damage or corrosion which could result in loss of power to EBCM. If connector is okay, go to next step. If connector is not okay, go to step 6).
  3. Check resistance between ground and 2-pin EBCM harness connector terminal "B". If resistance is 0-2 ohms, go to next step. If not, go to step 7).
  4. Check voltage between ground and 2-pin EBCM harness connector terminal "A". If voltage reading is greater than 10 volts, go to step 8). If not, go to next step.
  5. Inspect ABS fuse or fusible link. If fuse or fusible link is open, go to step 9). If fuse or fusible link is okay, go to step 10).
  6. Repair 2-pin EBCM harness connector as necessary. After repairs, perform DIAGNOSTIC SYSTEM CHECKΒ  .
  7. Repair open or high resistance in ground circuit to EBCM. See WIRING DIAGRAMΒ  . After repairs, perform DIAGNOSTIC SYSTEM CHECK.
  8. Replace EBCM. After replacing EBCM, perform DIAGNOSTIC SYSTEM CHECKΒ  .
  9. Repair short to ground in battery circuit between underhood fuse/relay block and EBCM. See WIRING DIAGRAMΒ  . After repairs, perform DIAGNOSTIC SYSTEM CHECKΒ  .
  10. Repair open or high resistance in battery circuit to EBCM. After repairs, perform DIAGNOSTIC SYSTEM CHECKΒ  .
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.