GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1999 🢒 GMC C-Series Medium Duty Truck B7 🢒 Suspension 🢒 Front Suspension 🢒 Front Spring Hanger Replacement

Removal Procedure
  1. Set the parking brake.
  2. Block the vehicle's rear wheels.

    3. Notice: Do not use the front crossmember to support the vehicle or the crossmember may buckle.

    Important: Raise the frame high enough in order to allow the spring to clear the front spring bracket when you lower the axle.

  3. Raise the frame until the front tires clear the floor.
  4. Support the frame using suitable safety stands.
  5. Support the axle with a jack.

    6. Object Number: 201719 Size: SH
  6. Remove the following components from the lower mounting brackets (7):
    7. • The nut (10)
    • The washer (9)
    • The insulator (8)
  7. Remove the shock absorbers (5) from the lower mounting brackets (7). Push the shock absorbers into the fully retracted position.

    8. Object Number: 376827 Size: SH
  8. Remove the following components from the spring and the hanger:
    9. • The spring eye bolt nut (4)
    • The washers
    • The bolt (7)
  9. Lower the axle far enough to allow the spring (5) to clear the bracket and allow removal of the bracket (2).

    10. Object Number: 376793 Size: MH
  10. Remove the following components from the side member (1):
    11. • The spring hanger nuts (6, 10)
    • The washers
    • The bolts (4,7)
    • The spring hanger (2)

    Object Number: 376796 Size: SH
  11. On vehicles equipped with tow hooks, front bumper brackets or frame extensions, remove the following components:
    12. • The bumper bracket (4)
    • The tow hook (7)

Installation Procedure

    Object Number: 376793 Size: MH
  1. Install the hanger to the side member with the following parts:
    2. • The bolts (4, 7)
    • The washers
    • The spring hanger nuts (6, 10)

    Object Number: 376796 Size: SH
  2. On vehicles equipped with tow hooks, front bumper brackets or frame extensions, install the following components:
    3. 2.1. The bumper brackets (4)
    2.2. The tow hooks (7)
    2.3. The bolts (4, 7)
    2.4. The washers (3, 5, 9)
    2.5. The spring hanger nuts (6, 10)

    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.

  3. Tighten the hanger mounting bolts.

    4. Tighten
    Tighten the hanger mounting nuts to 85 N·m (63 lb ft).


    Object Number: 376827 Size: SH
  4. Raise the spring in order to align the spring eye and spring hanger holes.
  5. Install the following components in the spring and the hanger:
    6. • The spring eye bolt (7)
    • The washers
    • The nut (4)

    Tighten
    Tighten the eye bolt to 330 N·m (243 lb ft).


    Object Number: 201719 Size: SH
  6. Install the flat washer (6) and the insulator (13) onto the shock absorber lower stem.
  7. Install the shock absorber (5) into the lower mounting bracket (7).
  8. Install the following components:
    9. • The insulators (8)
    • The flat washers (9)
    • The nut (10)

    Tighten
    Tighten the lower shock absorber nut to 84 N·m (62 lb ft).

  9. Remove the safety stands and lower the vehicle.