GMC Workshop Service and Repair Manuals

Suspension Spring ( Coil / Leaf ): Service and Repair
Leaf Spring

Leaf Spring Replacement (2500, 3500)

Leaf Spring Replacement (2500, 3500)

Removal Procedure

1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle   (See: Wheels and Tires/Vehicle Lifting/Service and Repair).

Note:  Support the axle independently from the vehicle.

2. Support the rear axle to relieve the tension on the leaf springs.
3. Remove the trailer hitch, if equipped. Refer to Trailer Hitch Replacement (Light Duty)   (See: Accessories and Optional Equipment/Towing /

Trailer System/Trailer Hitch/Service and Repair)Trailer Hitch Replacement (Heavy Duty)   (See: Accessories and Optional Equipment/Towing /
Trailer System/Trailer Hitch/Service and Repair).

Note:  For the 3500 Cab chassis vehicles, the auxiliary fuel tank must be removed to service the left or right rear shackle bolts. 

4. Remove the auxiliary fuel tank assembly, if needed. Refer to Fuel Tank Replacement (15 Rec Cab With 26 Gal Tank)   (See: Powertrain

Management/Fuel Delivery and Air Induction/Fuel Tank/Service and Repair/Removal and Replacement/Fuel Tank Replacement (15 Rec Cab
With 26 Gal Tank))Fuel Tank Replacement (15 Ext/Crew Cab With 26 Gal Tank)   (See: Powertrain Management/Fuel Delivery and Air
Induction/Fuel Tank/Service and Repair/Removal and Replacement/Fuel Tank Replacement (15 Ext/Crew Cab With 26 Gal Tank))Fuel Tank
Replacement (15 Reg/Ext/Crew Cab w/34 Gal Tank)   (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel Tank/Service and
Repair/Removal and Replacement/Fuel Tank Replacement (15 Reg/Ext/Crew Cab w/34 Gal Tank))Fuel Tank Replacement (Cab/Chassis - Rear)  
(See: Powertrain Management/Fuel Delivery and Air Induction/Fuel Tank/Service and Repair/Removal and Replacement/Fuel Tank Replacement
(Cab/Chassis - Rear))Fuel Tank Replacement (Cab/Chassis - Front)   (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel
Tank/Service and Repair/Removal and Replacement/Fuel Tank Replacement (Cab/Chassis - Front))Fuel Tank Replacement (35 Reg/Ext/Crew
Cab With 34 Gal Tank)   (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel Tank/Service and Repair/Removal and
Replacement/Fuel Tank Replacement (35 Reg/Ext/Crew Cab With 34 Gal Tank))Fuel Tank Replacement (15/25 Reg/Ext/Crw Cab With 34 Gal
Tnk)   (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel Tank/Service and Repair/Removal and Replacement/Fuel Tank
Replacement (15/25 Reg/Ext/Crw Cab With 34 Gal Tank))Fuel Tank Replacement (25 Ext/Crew Cab With 26 Gal Tank)   (See: Powertrain
Management/Fuel Delivery and Air Induction/Fuel Tank/Service and Repair/Removal and Replacement/Fuel Tank Replacement (25 Ext/Crew
Cab With 26 Gal Tank))

5. Remove and discard the rear spring U-bolt nuts (1) and the washers (2). Replace with NEW only.
6. Remove the rear spring anchor plate (3).