GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2000 🢒 Astro - 4WD 🢒 Engine 🢒 Engine Controls - 4.3L 🢒 In-Line Fuel Filter Replacement

Removal Procedure

    Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

  1. Disconnect the negative battery cable.
  2. Relieve fuel pressure. Refer to Fuel Pressure Relief .
  3. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.

    4. Object Number: 420635 Size: SH
  4. Remove the fuel feed pipe nuts (1) from both sides of the fuel filter.

    5. Object Number: 421945 Size: SH
  5. Remove the fuel filter mounting clamp bolt (1).

    6. Object Number: 421946 Size: SH
  6. Remove the filter (4) and the clamp (3) from fuel lines.
  7. Drain any remaining fuel from the fuel pipes into an approved gasoline container.
  8. Remove the mounting clamp from the fuel filter.

Installation Procedure

    Object Number: 421946 Size: SH
  1. Install the mounting clamp (3) onto the fuel filter (4).

    2. Important: Be sure to install the fuel filter with the embossed arrow pointing in the direction of fuel flow.

  2. Install the fuel filter (4) and clamp (3) to the fuel pipe.

    3. Object Number: 421945 Size: SH
  3. Install the clamp bolt (1).

    4. Tighten
    Tighten the fuel filter mounting clamp bolt to 11 N·m (97 lb in).


    Object Number: 420635 Size: SH
  4. Install the fuel feed pipe nuts (1).

    5. Tighten
    Tighten the fuel feed pipe nuts to 27 N·m (20 lb ft).

  5. Connect the negative battery cable.
  6. Inspect for leaks.
    7. 8.1. Turn ON the ignition for 2 seconds.
    8.2. Turn OFF the ignition for 10 seconds.
    8.3. Turn ON the ignition for 2 seconds.
    8.4. Inspect for fuel leaks.