GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1999 🢒 GMC C-Series Medium Duty Truck B7 🢒 Transmission/Transaxle 🢒 Manual Transmission - Medium Duty 🢒 Air Shift Control Line Replacement

Air Shift Control Line Replacement 4 + 4

Air Shift Control Line (All 4 x 2 Trucks)

    Object Number: 199840 Size: SH
  1. Remove the screw securing the clip and air line to the transmission bracket.
  2. Remove the air line from the adapter on the transmission.
  3. Remove the air line from the connector on the frame rail.

    4. Object Number: 199859 Size: SH
  4. Remove the six straps securing the air line to the frame rail brackets and wiring harness.
  5. Remove the air line from the air tee valve.
  6. Remove the air line from the elbow on the air reservoir.

Installation Procedure

    Important: Inspect the air line fittings for damage prior to installation.


    Object Number: 199859 Size: SH
  1. Install the air line from the air tee valve.
  2. Install the air line to the adapter on the frame rail.
  3. Install the six straps securing the air line to the frame rail brackets and wiring harness.

    4. Object Number: 199840 Size: SH
  4. Install the air line from the connector in the frame rail.
  5. Install the air line from the adapter on the transmission.
  6. Install the screw securing the clip and air line to the transmission bracket.

Air Shift Control Line Replacement Trucks without 4 + 4

Air Shift Control Line (All 4 x 2 Trucks)

    Object Number: 199840 Size: SH
  1. Remove the screw securing the clip and air line to the transmission bracket.
  2. Remove the air line from the adapter on the transmission.
  3. Remove the air line from the connector on the frame rail.

    4. Object Number: 199859 Size: SH
  4. Remove the six straps securing the air line to the frame rail brackets and wiring harness.
  5. Remove the air line from the air tee valve.
  6. Remove the air line from the elbow on the air reservoir.

Installation Procedure

    Important: Inspect the air line fittings for damage prior to installation.


    Object Number: 199859 Size: SH
  1. Install the air line from the air tee valve.
  2. Install the air line to the adapter on the frame rail.
  3. Install the six straps securing the air line to the frame rail brackets and wiring harness.

    4. Object Number: 199840 Size: SH
  4. Install the air line from the connector in the frame rail.
  5. Install the air line from the adapter on the transmission.
  6. Install the screw securing the clip and air line to the transmission bracket.