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HOMESERVICE MANUALSCHEVROLET2006CHEVY EXPRESS G2500, VAN CARGO, 6.6 2REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 691 (ENGINE COOLING SYSTEM (1 OF 2))REPAIR INSTRUCTIONSCOOLANT TANK - STARTER/GENERATOR CONTROL MODULE REPLACEMENTREMOVAL PROCEDURE
2006 Chevrolet Chevy Express G2500, Van Cargo, 6.6 2

Removal Procedure

2006 Chevrolet Chevy Express G2500, Van Cargo, 6.6 2SECTION Removal Procedure
WARNING: This page is about a different car, the 2006 GMC Sierra, 2006 GMC Cab & Chassis Sierra, 2006 Chevrolet Silverado, and 2006 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Identifying Hood Hinge Normal And Service Position Bolt Holes
    GM310799Courtesy of GENERAL MOTORS CORP.
  1. Drain the starter/generator control module (SGCM) cooling system. Refer to Draining and Filling Cooling System - Starter/Generator Control Module .
  2. Raise the hood to the service position, and perform the following steps:
    1. Remove the ground strap from the hood.
    2. Remove the hood hinge bolts (1).
    3. Raise the hood until vertical.
    4. Install the hood hinge bolts until snug in the service position (2).
    3. Fig 2: View Of SGCM, Coolant Tank, Hose & Clamp
    GM1206680Courtesy of GENERAL MOTORS CORP.
  3. Reposition the SGCM coolant tank hose clamp (2) from the SGCM coolant tank (3).
  4. Remove the SGCM coolant tank hose (1) from the SGCM coolant tank (3).
    5. Fig 3: View Of SGCM Pressure Relief Valve & Hose
    GM1237052Courtesy of GENERAL MOTORS CORP.
  5. Reposition the SGCM pressure relief hose clamp from the SGCM pressure relief valve.
  6. Remove the SGCM pressure relief hose from the SGCM pressure relief valve.
    7. Fig 4: View Of SGCM, Brace & Bolts
    GM1237056Courtesy of GENERAL MOTORS CORP.
  7. Remove the surge tank mounting bolts. Position the surge tank away from the SGCM module.
  8. Remove the bolts (1) from the brace.
    9. Fig 5: View Of SGCM Coolant Inlet Hose, Coolant Tank & Inlet Hose Clamp
    GM1206674Courtesy of GENERAL MOTORS CORP.
  9. Reposition the SGCM coolant pump inlet hose clamp (1) from the SGCM coolant tank (2).
  10. Remove the SGCM coolant pump inlet hose (3) from the SGCM coolant tank (2).
  11. Remove the bolts from the SGCM coolant tank.
    12. Fig 6: View Of SGCM, Brace & Bolts
    GM1237056Courtesy of GENERAL MOTORS CORP.
  12. Reposition the SGCM coolant tank in order to access the SGCM rear bolt.
  13. Remove the rear bolt (2) from the SGCM.
  14. Remove the front bolt (3) from the SGCM.
  15. Reposition the SGCM in order to remove the SGCM coolant tank.
    16. Fig 7: View Of SGCM Coolant Inlet Hose, Coolant Tank & Inlet Hose Clamp
    GM1206674Courtesy of GENERAL MOTORS CORP.
  16. Remove the SGCM coolant tank (2) from the vehicle.
RENDER: 1.0x

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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.