SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSCHEVROLET2006CHEVY EXPRESS G2500, VAN CARGO, 6.6 2REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 249 (STATIONARY WINDOW SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESDEFOGGER GRID LINES DIAGNOSIS
2006 Chevrolet Chevy Express G2500, Van Cargo, 6.6 2

Defogger Grid Lines Diagnosis

2006 Chevrolet Chevy Express G2500, Van Cargo, 6.6 2SECTION Defogger Grid Lines Diagnosis
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2003 GMC Savana Special, 2003 GMC Savana Camper Special, 2003 GMC Savana, 2003 Chevrolet RV Cutaway, and 2003 Chevrolet Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
  1. Start the engine.
  2. Activate the rear window defogger system.
  3. Connect a test lamp to a good ground.

    Important:  The test lamp brilliance will decrease proportionately to the increased resistance in the grid line as the probe is moved from the battery positive bus wire to the ground bus wire. The test lamp brilliance may vary from one window to another.

  4. Move the test lamp probe from zone 5 to zone 1 along each grid line.
    • If the test lamp shows full brilliance at both ends of the grid lines. Inspect for an open or poor connection in the ground circuit of the rear window defogger grid. Refer to TESTING FOR INTERMITTENT AND POOR CONNECTIONS and CONNECTOR REPAIRS .
      Fig 1: Identifying Grid Line Zones
      G02422824Courtesy of GENERAL MOTORS CORP.
    • If the test lamp goes out, test the grid line in at least 2 places (1,3) to eliminate the possibility of bridging the open (2) in the grid line.
  5. Once the open (2) is located, repair the grid line. Refer to Grid Line Repair .
    6. Fig 2: Testing Grid Line
    G02422825Courtesy of GENERAL MOTORS CORP.
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.