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HOMESERVICE MANUALSGMC1999FORWARD CONTROL 5.7 R, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 404 (ENGINE COOLING SYSTEM)REPAIR INSTRUCTIONSCOOLING FAN REPLACEMENT - ELECTRIC (L47)INSTALLATION PROCEDURE
1999 GMC Forward Control 5.7 R, Automatic

Installation Procedure

1999 GMC Forward Control 5.7 R, AutomaticSECTION Installation Procedure
WARNING: This page is about a different car, the 2002 Oldsmobile Aurora and 2001 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.
  1. Install the motor (2) to the shroud (1).
    CAUTION: Refer to FASTENER NOTICE .
  2. Install the motor retaining screws (3).

    Tighten 

    Tighten the screws to 6 N.m (53 in lbs).

  3. Install the fan (4) to the motor shaft.
  4. Install the fan retaining nut (5) to the motor (2).

    Tighten 

    Tighten the retaining nut to 6 N.m (53 in lbs).

    Fig 1: Exploded View Of Fan Assembly
    G01817518Courtesy of GENERAL MOTORS CORP.

    Important:  Care should be taken when installing the cooling fan assembly not to damage the lower attachment points of both the cooling fan assembly and radiator.

  5. Install the cooling fan assembly into position, aligning the lower feet of the shroud to the mounting features on the radiator.
    CAUTION: The bolt retaining the condenser to the radiator end tank is a special length and should be the ONLY bolt used upon reinstallation. The use of a longer bolt will damage the radiator end tank.
  6. Install the cooling fan mounting bolts

    Tighten 

    Tighten the bolts to 6 N.m (53 in lbs).

    Fig 2: Installing Cooling Fan Mounting Bolts
    G01817519Courtesy of GENERAL MOTORS CORP.
  7. Connect the wiring harness electrical connectors (1) to the cooling fan motors.
  8. Attach the wiring harness retaining clips (2) to the fan shroud.
  9. Connect the 2 retainers to the A/C discharge hose.
    Fig 3: Connecting Cooling Fan Motor Wiring Harness Electric Connectors
    G01817520Courtesy of GENERAL MOTORS CORP.
  10. Push the upper transaxle oil cooler line into the radiator quick connect fitting, until a "click" is heard.
  11. Tug gently on the cooler line to ensure proper retention.
  12. Slide the plastic cap (1) over the quick connect joint.
    Fig 4: Installing Upper Transaxle Oil Cooler Line
    G01817521Courtesy of GENERAL MOTORS CORP.
  13. Install the upper transaxle oil cooler line retaining bolt to the fan shroud.

    Tighten 

    Tighten the bolt to 6 N.m (53 in lbs).

    Fig 5: Installing Upper Transaxle Oil cooler Line
    G01817522Courtesy of GENERAL MOTORS CORP.
  14. Connect the radiator hose (2) to the radiator (1).
  15. Using the J 37097-A  (3) reposition the clamp.
    16. Fig 6: Identifying J 37097-A
    G01817523Courtesy of GENERAL MOTORS CORP.
  16. Install the upper tie bar. Refer to TIE BAR REPLACEMENT -- UPPER .
  17. Connect the battery negative cable. Refer to BATTERY NEGATIVE CABLE DISCONNECT/CONNECT PROCEDURE .
  18. Fill the cooling system. Refer to Draining and Filling Cooling System .
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.