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HOMESERVICE MANUALSGMC1999FORWARD CONTROL 5.7 R, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 404 (ENGINE COOLING SYSTEM)REPAIR INSTRUCTIONSCOOLING FAN REPLACEMENT - ELECTRIC (LX5)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
    G01817508Courtesy of GENERAL MOTORS CORP.

    Important:  Care should be taken when installing the cooling fan assembly not to damage 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 lower mounting features on the radiator.
    CAUTION: The bolts retaining the cooling fan to the radiator end tanks are a special length and should be the ONLY bolts used upon reinstallation. The use of longer bolts will damage the radiator end tanks.
  6. Install the cooling fan mounting bolts

    Tighten 

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

    Fig 2: Installing Fan Shroud Mounting Bolts
    G01817509Courtesy of GENERAL MOTORS CORP.
  7. Push the upper transaxle oil cooler line into the radiator quick connect fitting, until a "click" is heard.
  8. Tug gently on the cooler line to ensure proper retention.
  9. Slide the plastic cap (1) over the quick connect joint.
  10. Raise and support the vehicle.
    Fig 3: Installing Upper Transaxle Oil Cooler Line
    G01817510Courtesy of GENERAL MOTORS CORP.
  11. Install the transaxle oil cooler line retaining clip and bolt to the fan shroud.

    Tighten 

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

  12. Install the lower air deflector. Refer to AIR DEFLECTOR REPLACEMENT -- FRONT .
    Fig 4: Installing Transaxle Oil Cooler Line Retaining Clip & Bolt
    G01817511Courtesy of GENERAL MOTORS CORP.
  13. Connect the wiring harness electrical connectors to the cooling fan motors.
    14. Fig 5: Connect Wiring Harness Electrical Connectors To Cooling Fan Motors
    G01817512Courtesy of GENERAL MOTORS CORP.
  14. Attach the wiring harness retaining clips to the fan shroud.
  15. Install the upper tie bar. Refer to TIE BAR REPLACEMENT -- UPPER .
  16. Connect the battery negative cable. Refer to BATTERY NEGATIVE CABLE DISCONNECT/CONNECT PROCEDURE .
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.