Removal Procedure
- Raise and support the vehicle. Refer to
Lifting and Jacking the Vehicle
.
- Support the rear axle independently in order to relieve the tension on the leaf springs.
- Remove the leaf spring U-bolt nuts.
- Remove the leaf spring U-bolts.
- Remove the leaf spring spacer.
- Remove the leaf spring anchor plate.
- Remove the leaf spring (1) to the spring shackle (5) mounting bolt and nut (3).
- Remove the leaf spring to the front hanger bracket mounting nut and bolt.
- Remove the leaf spring from the vehicle.
Installation Procedure
- Install the leaf spring to the vehicle.
- Perform the following procedure before installing the front hanger bracket mounting bolt.
2.1. | Remove all traces of the original adhesive patch. |
2.2. | Clean the threads of the bolt with brake parts cleaner or the equivalent and allow to dry. |
2.3. | Apply Threadlocker GM P/N 12345493 (Canadian P/N 10953488) to the threads of the bolt. |
- Loosely install the leaf spring to the front hanger bracket mounting bolt and nut.
- Install the leaf spring (1) to the spring shackle (5) mounting bolt and nut (3).
Important: Do not reuse the leaf spring U-bolts.
- Install the leaf spring spacer.
- Install the leaf spring U-bolts.
- Install the leaf spring anchor plate.
Notice: Refer to Fastener Notice in the Preface section.
- Install the leaf spring U-bolt nuts.
Tighten
• | Tighten the leaf spring U-bolt mounting nuts to 85 N·m (63 lb ft) (All 1500 Series). |
• | Tighten the leaf spring U-bolt mounting nuts to 140 N·m (103 lb ft) (All 2500 Series and 3500 Series Cargo and Passenger Vans and Cutaways With 9Q4). |
• | Tighten the leaf spring U-bolt mounting nuts to 147 N·m (108 lb ft) (3500 Series Cutaways Without 9Q4). |
- Tighten the front hanger bracket and spring shackle mounting nuts.
Tighten
• | Tighten the front hanger bracket mounting nut to 100 N·m (74 lb ft) plus 210 degrees. |
• | Tighten the leaf spring to front hanger mounting nut to 200 N·m (148 lb ft) plus 183 degrees. (W/14050 GVW) |
• | Tighten the spring shackle to frame mounting nut to 115 N·m (85 lb ft). |
• | Tighten the spring shackle to leaf spring mounting nut to 85 N·m (63 lb ft). |
- Remove the rear axle support.
- Lower the vehicle.