GM Service Manual Online
For 1990-2009 cars only

Rear Washer Hose Routing

The rear washer hose is a component of the main body wire harness assembly. The rear washer hose is a hard plastic convoluted tube that is wrapped in the electrical tape along with the main body wiring harness. It starts underhood where it connects to the rear washer solvent container hose, this is rubber tubing. The rear washer hose routes into the main body wire harness underhood and passes through the front of the dash. The rear washer hose runs inside the vehicle interior along the left side rocker and over the left rear wheel housing. The rear washer hose is then routed up the left side pillar where it connects to the rear washer nozzle hose , where it is rubber tubing, at the top of the lift gate opening.

Removal Procedure

  1. Locate the damaged section of the rear washer hose, this will be hard plastic convoluted tubing.
  2. If the leak is located inside the main body wire harness, cut back the wire harness electrical tape to expose the damaged section.
  3. Cut out the damaged section of the rear washer hose.

Installation Procedure


    Object Number: 943743  Size: SH
  1. Replace the damaged section of the rear washer hose.
  2. • Use a 9.5 mm (3/8 in) vacuum hose to replace damaged section.
    • Overlap the rear washer hose, the plastic tubing, by 10 mm (0.39 in) on each end.
    • Retain each end of the vacuum hose with a 100 mm (4 in) cable tie.
  3. Verify the repair by activating the washer system and checking for leaks.
  4. If the leak was located inside the main body wire harness, use electrical tape to retain the repaired section to the wire harness.

  5. Object Number: 943751  Size: SH
  6. If the leak requires the rear washer hose to be removed in the front of dash grommet do the following:
  7. • Cut out the auxiliary washer hose hole from the grommet.
    • Pass new section of the rear washer hose through the new grommet hose.
    • Repair the hose on either side of the grommet.