SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSCHEVROLET2008CHEVY EXPRESS G2500, VAN CARGO, 6.6 6REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 2618 (HYBRID/EV COOLING SYSTEM)REPAIR INSTRUCTIONSGENERATOR CONTROL MODULE COOLING SYSTEM DRAINING AND FILLINGDRAINING PROCEDURE
2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6

Draining Procedure

2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6SECTION Draining Procedure
WARNING: This page is about a different car, the 2012 GMC Yukon, 2012 Chevrolet Tahoe, and 2012 Cadillac Escalade. However, it is still accessible from the selected car via links, so may be relevant.
WARNING:

To avoid being burned, do not remove the radiator cap or surge tank cap while the engine is hot. The cooling system will release scalding fluid and steam under pressure if radiator cap or surge tank cap is removed while the engine and radiator are still hot.

  1. Follow the steps below in order to remove the surge tank fill cap:
    1. Slowly rotate the cap counterclockwise.
    2. Stop rotating and allow the hissing to stop.
    3. After all the hissing stops, continue turning counterclockwise in order to remove the cap.
  2. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
  3. Place a drain pan under the generator control module coolant pump hose. Refer to Generator Control Module Coolant Pump Hose Replacement (Pump to Radiator) , Generator Control Module Coolant Pump Hose Replacement (Pump to Pump) .
  4. Using the J 38185  hose clamp pliers, reposition the generator control module coolant pump hose clamp.
  5. Remove the generator control module coolant pump hose from the coolant pump.
  6. Drain the coolant.
  7. Place a drain pan under the generator control module coolant inlet hose. Refer to Generator Control Module Coolant Inlet Hose Replacement .
  8. Using the J 38185  hose clamp pliers, reposition the generator control module coolant inlet hose clamp.
  9. Drain the coolant.
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.