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

Removal Procedure

    Object Number: 201719 Size: SH
  1. Set the parking brake.
  2. Block the wheels.
  3. Remove the following components from the shock absorber (5) at the lower bracket (7):
    4. 3.1. The nut (10)
    3.2. The flat washer (9)
    3.3. The insulator (8)
  4. Remove the following components from the shock absorber at the upper bracket (14):
    5. 4.1. The nut (1)
    4.2. The flat washer (15)
    4.3. The insulator (2)
  5. Remove the shock absorber (5) from the upper and the lower mounting brackets. Compress the shock absorber slightly in order to remove.
  6. Remove the remaining flat washers (4,6) and the insulators (3,13).
  7. Clean the shock absorber of the following conditions:
    8. • Dirt
    • Oil
    • Corrosion
  8. Inspect the shock absorber for the following conditions:
    9. • Wear
    • Cracks
    • Damage
    • Signs of leaking
    • A bent damper rod
    • Worn or torn insulators
  9. Inspect the upper and the lower mounting brackets for the following conditions:
    10. • Cracks
    • Bends
    • Wear
    • Damage
  10. Inspect the frame mounting hole for the following conditions:
    11. • Cracks
    • Wear
    • Burrs
  11. Diagnose the shock absorbers. Refer to the appropriate procedure:
    12. •  Struts or Shock Absorbers Bench Test
    •  Suspension Strut and Shock Absorber Testing - On Vehicle

Installation Procedure

    Object Number: 201719 Size: SH
  1. Install the flat washer (6) and the insulator (13) onto the shock absorber lower stem.
  2. Install the shock absorber lower stem into the lower mounting bracket (7).
  3. Install the flat washer (4) and the insulator (3) onto the shock absorber upper stem.
  4. Install the shock absorber upper stem into the upper mounting bracket (14).

    5. 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.

  5. Install the following components onto the shock absorber lower stem:
    6. 5.1. The insulator (8)
    5.2. The flat washer (9)
    5.3. The nut (10)

    Tighten
    Tighten the lower shock absorber nuts (10) to 84 N·m (62 lb ft).

  6. Install the following components onto the shock absorber upper stem:
    7. 6.1. The insulator (2)
    6.2. The flat washer (15)
    6.3. The nut (1)

    Tighten
    Tighten the upper shock absorber nuts (1) to 84 N·m (62 lb ft).

  7. Lower the vehicle.
  8. Remove the blocks.