GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1999 🢒 Envoy - 4WD 🢒 Body and Accessories 🢒 Wipers/Washer Systems 🢒 Rear Window Washer Hose Replacement - Pump to Endgate

Removal Procedure
  1. Remove the left front seat. Refer to Seat Replacement in Seats.
  2. Remove the rear seat. Refer to Rear Seat Replacement in Seats.
  3. Remove the endgate/liftgate door sill plate. Refer to Rear Floor Rear Trim Plate Replacement or Liftgate Door Sill Plate Replacement in Interior Trim.
  4. Remove the left front and left rear door sill plates. Refer to Door Sill Plate Replacement in Interior Trim.
  5. Remove the left body side trim panel. Refer to Body Side Trim Panel Replacement in Interior Trim.
  6. Remove the left hinge pillar trim panel. Refer to Body Hinge Pillar Trim Panel Replacement - Left Side in Interior Trim.
  7. Fold over the left side of the carpet to allow access to the body harness. Refer to Front Floor Mat/Carpet Replacement and Rear Floor Panel Carpet Replacement in Interior Trim.

    8. Object Number: 750541 Size: SH
  8. Disconnect the washer hose connection (1) from the body harness (2) at the endgate.
  9. Remove the air cleaner assembly. Refer to Air Cleaner Assembly Replacement in Engine Controls.

    10. Object Number: 750535 Size: SH
  10. Disconnect the hose (1) from the rear washer pump.
  11. Install a plug to the rear washer pump nozzle to prevent washer fluid loss.
  12. Push the hose grommet (2) in through the bulkhead.

    13. Object Number: 750539 Size: SH
  13. Pull the washer hose (1) into the vehicle though the bulkhead.
  14. Cut the old washer hose off where it enters the body wiring harness (2).
  15. Remove the hose from the vehicle.

Installation Procedure
  1. Install the hose to the vehicle.

    2. Object Number: 750539 Size: SH
  2. Route the hose (1) out though the bulkhead.
  3. Route the hose along the side of body harness (2), and tape the hose to the body harness with 3 wraps of electrical tape every 100 mm (4 in.).
  4. Seat the hose grommet (2) into the bulkhead.
  5. Remove the plug from the rear washer pump nozzle.

    6. Object Number: 750535 Size: SH
  6. Connect the hose (1) to the rear washer pump.
  7. Install the air cleaner assemby. Refer to Air Cleaner Assembly Replacement in engine controls.

    8. Object Number: 750541 Size: SH
  8. Connect the washer hose connection (1) at the endgate.
  9. Install the carpet. Refer to Front Floor Mat/Carpet Replacement and Rear Floor Panel Carpet Replacement in Interior Trim.
  10. Install the left hinge pillar trim panel. Refer to Body Hinge Pillar Trim Panel Replacement - Left Side in Interior Trim.
  11. Install the left body side trim panel. Refer to Body Side Trim Panel Replacement in Interior Trim.
  12. Install the left front and left rear door sill plate. Refer to Door Sill Plate Replacement in Interior Trim.
  13. Install the endgate/liftgate door sill plate. Refer to Rear Floor Rear Trim Plate Replacement or Liftgate Door Sill Plate Replacement in Interior Trim.
  14. Install the rear seat. Refer to Rear Seat Replacement in Seats.
  15. Install the left front seat. Refer to Seat Replacement in Seats.