GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2000 🢒 GMC C-Series Medium Duty Truck B7 🢒 Suspension 🢒 Rear Suspension 🢒 Leaf Spring Replacement

Removal Procedure

    Object Number: 202137 Size: LH
  1. Set the parking brake.
  2. Block the front wheels.
  3. Raise the vehicle frame using a suitable lifting device in order to remove the weight of the vehicle from the spring assembly.

    4. Support the frame forward of the of the rear axle.

  4. Remove the rear dual wheel assembly, if necessary. Refer to Tire and Wheel Removal and Installation
  5. Remove the following components:
    6. • The rebound nut
    • The washer
    • The bolt
  6. Remove the following components:
    7. • The shock absorber nut
    • The washer
    • The insulator
    • The shock absorber and washer
  7. Remove the U-bolt nuts and washers.
  8. Remove the following components:
    9. • The U-bolt anchor plate
    • The seat
    • The shock absorber bracket
  9. Remove the U-bolts.
  10. Lower the axle slightly.
  11. Remove the following components:
    12. • The eye bolt nut
    • The washer
    • The eye bolt
  12. Support and raise the vehicle using a suitable lifting device in order to provide clearance between the spring assembly and the hanger bracket.

    13. Support the frame forward of the rear axle.

  13. Remove the following components:
    14. • The auxiliary spring bolt
    • The spacer
    • U-bolt spacer
  14. Remove the spring assembly using a suitable hoist.

Installation Procedure

    Object Number: 202329 Size: SH
  1. Install the spring assembly onto the axle pad or axle stabilizer/spring seat, if equipped, using a suitable hoist.
  2. Install the following components:
    3. • The auxiliary spring
    • The U-bolt spacer
    • The spacers
    • The bolt
  3. Install the U-bolt spacer over the center bolt.
  4. Install the U-bolts into the spacer grooves.
  5. Install the U-bolt anchor plate (1) and seat.
  6. Install the shock absorber bracket or stabilizer shaft/spring seat, if equipped.

    7. 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.

    Important: In order to properly tighten the U-bolt nuts, torque the nuts progressively as outlined below.

  7. On 15,000 lb axles, install the 20 mm U-bolt nuts (2) and the washers.

    8. Tighten

        • Tighten the U-bolt nuts to 100 N·m (74 lb ft) in sequence.
        • Tighten the U-bolt nuts to 250 N·m (184 lb ft) in sequence.
        • Tighten the U-bolt nuts to 388 N·m (287 lb ft) in sequence.
  8. On 19,000-26,000 lb axles, install the 20 mm U-bolt nuts (2) and the washers.

    9. Tighten

        • Tighten the U-bolt nuts to 150 N·m (111 lb ft) in sequence.
        • Tighten the U-bolt nuts to 275 N·m (203 lb ft) in sequence.
        • Tighten the U-bolt nuts to 437 N·m (344 lb ft) in sequence.
  9. Install the following components:
    10. • The spring eye bolt nut
    • The washer
    • The eye bolt

    Tighten
    Tighten the spring front eye bolt to 415 N·m (305 lb ft).

  10. Install the following components:
    11. • The shock absorber washer
    • The shock absorber
    • The insulator
    • The washer
    • The nut

    Tighten
    Tighten the lower shock absorber nut to 60 N·m (45 lb ft).

  11. Lower the frame until the hangers touch the surface of the spring eye.

    12. Object Number: 202137 Size: LH
  12. For tapered leaf springs, install the following components:
    13. • The rear spring hanger rebound bolt

    Tighten
    Tighten the rear spring hanger rebound bolt to 415 N·m (305 lb ft).

    • The washer
    • The nut
  13. For multileaf springs, install the rear spring hanger bolt.

    14. Tighten
    Tighten the rear spring hanger bolt. Ensure that a minimum of 84.07 mm (3.36 in) is between the ears of the rear spring hanger.