GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2001 🢒 Chevy C Cab/Chassis HD (GMT 400) 🢒 Body and Accessories 🢒 Body Front End 🢒 Radiator Replacement

Removal Procedure

    Object Number: 696691 Size: SH
  1. Disconnect the mass airflow (MAF) sensor electrical connector (4).
  2. Disengage the cover clips (2).
  3. Remove the air cleaner cover (1).

    4. Object Number: 745585 Size: SH
  4. Loosen the air intake duct clamp at the throttle body.
  5. Remove the air intake duct and air cleaner element.
  6. Drain the cooling system. Refer to Cooling System Draining and Filling .

    7. Object Number: 746709 Size: SH
  7. If equipped with a 8.1L engine, reposition the reservoir hose clamp at the radiator.
  8. Remove the reservoir hose from the radiator.

    9. Object Number: 746843 Size: SH
  9. If equipped with a 6.5L engine, reposition the surge tank inlet hose clamp at the radiator.
  10. Remove the inlet hose from the radiator.

    11. Object Number: 746710 Size: SH
  11. Reposition the inlet hose clamp (3) at the radiator. (L18 engine shown, L65 similar).
  12. Reposition the outlet hose clamp (4) at the radiator.
  13. Remove the inlet (2) and outlet (5) hoses from the radiator.

    14. Object Number: 746711 Size: SH
  14. If equipped with a 8.1L engine, remove the engine oil cooler lines from the radiator.
  15. Remove the hose clip from the fan shroud.
  16. Remove the transmission oil cooler lines from the radiator.
  17. Remove the fan shroud. Refer to Fan Shroud Replacement .

    18. Object Number: 746717 Size: SH
  18. Remove the radiator mounting bracket bolts and brackets.
  19. Remove the radiator.

Installation Procedure

    Object Number: 746717 Size: SH
  1. Install the radiator.

    2. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  2. Install the radiator mounting brackets and bolts.

    3. Tighten
    Tighten the radiator mounting bracket bolts to 25 N·m (18 lb ft).

  3. Install the fan shroud. Refer to Fan Shroud Replacement .

    4. Object Number: 746711 Size: SH
  4. Install the transmission oil cooler lines to the radiator.
  5. If equipped with a 8.1L engine, install the engine oil cooler lines to the radiator.
  6. Install the hose clip to the fan shroud.

    7. Object Number: 746710 Size: SH
  7. Install the inlet (2) and outlet (5) hoses to the radiator. (L18 engine shown, L65 similar).
  8. Position the outlet hose clamp (4) at the radiator.
  9. Position the inlet hose clamp (3) at the radiator.

    10. Object Number: 746843 Size: SH
  10. If equipped with a 6.5L engine, install the inlet hose to the radiator.
  11. Position the surge tank inlet hose clamp at the radiator.

    12. Object Number: 746709 Size: SH
  12. If equipped with a 8.1L engine, install the reservoir hose to the radiator.
  13. Position the reservoir hose clamp at the radiator.
  14. Fill the cooling system. Refer to Cooling System Draining and Filling .

    15. Object Number: 745585 Size: SH
  15. Install the air intake duct and air cleaner element.
  16. Tighten the air intake duct clamp at the throttle body.

    17. Tighten
    Tighten the air intake duct clamp to 3 N·m (26 lb in).


    Object Number: 696691 Size: SH
  17. Install the air cleaner cover (1).
  18. Engage the cover clips (2).
  19. Connect the MAF sensor electrical connector (4).