GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1998 🢒 Safari - 2WD 🢒 HVAC 🢒 Heating, Ventilation and Air Conditioning 🢒 Auxiliary Heater Pipe Replacement - Front

Removal Procedure

    Object Number: 280253 Size: SH
  1. Drain the engine coolant. Refer to Cooling System Draining and Filling in Engine Cooling.
  2. Remove the front pipes (5) from the rear pipes.
  3. Remove the bolts (3) that retain the front pipes (5) to the body.
  4. Remove the clips (4) that retain the front pipes (5) to the body.
  5. Remove the auxiliary heater front pipes (5) from the heater hoses (1).
  6. Remove the auxiliary heater front pipes (5).

Installation Procedure
  1. Install the auxiliary heater front pipes (5).
  2. Connect the auxiliary heater front pipes (5) to the heater hoses (1).

    3. Object Number: 280253 Size: SH
  3. Install the clips (4) that retain the front pipes (5) to the body.

    4. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  4. Install the bolts (3) that retain the front pipes (5) to the body.

    5. Tighten
    Tighten the front pipe retaining bolts to the front pipes to 4 N·m (35 lb in).

  5. Connect the auxiliary heater front pipes (5) to the rear pipes.
  6. Fill the cooling system with engine coolant. Refer to Cooling System Draining and Filling in Engine Cooling.
  7. Inspect the system for leaks.