SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSCHEVROLET2006CHEVY EXPRESS G2500, VAN CARGO, 6.6 2REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 199 (CHARGING SYSTEM)SELF-DIAGNOSTIC SYSTEMNOTES
2006 Chevrolet Chevy Express G2500, Van Cargo, 6.6 2

Self-Diagnostic System: Notes

2006 Chevrolet Chevy Express G2500, Van Cargo, 6.6 2SECTION Notes
WARNING: This page is about a different car, the 2003 GMC Savana Special, 2003 GMC Savana Camper Special, 2003 GMC Savana, and 2003 Chevrolet Chevy Express. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: The following test is written specifically for Tech 2 scan tool. A generic scan tool may not be capable of performing all necessary test functions.

Begin system diagnosis with engine electrical diagnostic system check. Diagnostic system check will provide following information:

  • Identification of control module(s) which command system.
  • Ability of control module(s) to communicate through serial data circuit.
  • Identification of any stored DTCs and their current status.
Using diagnostic system check will identify correct procedure for diagnosing system and where procedure is located. This article only covers the portion of those systems which relates to charging system diagnosis. For further information, see appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE.

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.