GM Service Manual Online
For 1990-2009 cars only

Fuel Cooler Replacement Pickup

Removal Procedure


    Object Number: 737642  Size: SH
  1. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle .
  2. Disconnect the fuel lines at the cooler (1). Refer to Metal Collar Quick Connect Fitting Service .
  3. Remove the fuel cooler bolts (4, 6).
  4. Remove the fuel cooler (1).
  5. Remove the fuel cooler support bracket bolt (2, 5), and bracket (3) from the fuel cooler (1), if necessary.

Installation Procedure

    Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 737642  Size: SH
  1. Install the fuel cooler support bracket (3), and bolts (2, 5) to the fuel cooler (1), if necessary.
  2. Tighten
    Tighten the bolts to 18 N·m (13 lb ft).

  3. Install the fuel cooler (1) to the chassis and crossover.
  4. Install the fuel cooler bolts (4, 6).
  5. Tighten
    Tighten the bolts to 18 N·m (13 lb ft).

  6. Connect the fuel lines at the fuel cooler (1). Refer to Metal Collar Quick Connect Fitting Service .
  7. Lower the vehicle.
  8. Prime the fuel system. Refer to Fuel System Priming .
  9. Start the engine. If the engine stalls, repeat the above step.
  10. Once the engine starts, inspect for fuel leaks.

Fuel Cooler Replacement Cab/Chassis

Removal Procedure


    Object Number: 737641  Size: SH
  1. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle .
  2. Disconnect the fuel lines at the fuel cooler (1). Refer to Metal Collar Quick Connect Fitting Service .
  3. Remove the fuel cooler nuts (2).
  4. Remove the fuel cooler (1).

Installation Procedure

    Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 737641  Size: SH
  1. Install the fuel cooler (1).
  2. Install the fuel cooler nuts (2).
  3. Tighten
    Tighten the nuts to 40 N·m (30 lb ft).

  4. Connect the fuel lines at the fuel cooler (1). Refer to Metal Collar Quick Connect Fitting Service .
  5. Lower the vehicle.
  6. Prime the fuel system. Refer to Fuel System Priming .
  7. Start the engine. If the engine stalls, repeat the above step.
  8. Once the engine starts, inspect for fuel leaks.