Removal Procedure

The optional oil cooler is either an integral part of the radiator or a separate unit placed in front of the radiator. The cooler lines and hoses are serviceable.

Fig 1: Locating Quick Connect Fitting
Courtesy of GENERAL MOTORS COMPANY
1. Disconnect the engine oil cooler quick connect fittings. Refer to Engine Oil Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection .
2. If equipped with regular production option (RPO) L76 (6.0L) engine, perform the following.
   1. Open the oil cooler hose clip located on the lower fan shroud.
   2. Remove the oil cooler hoses from the clip.
3. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle .
Fig 2: View Of Oil Cooler Hoses & Clips
Courtesy of GENERAL MOTORS COMPANY
4. If equipped with RPO LY6 (6.0L) engine, remove the oil cooler hoses from the clip.
5. Place a jack or utility stands at the rear of the vehicle.
6. If equipped, remove the engine protection shield. Refer to Engine Shield Replacement .
7. If equipped, remove the oil pan skid plate, if equipped. Refer to Oil Pan Skid Plate Replacement (1500 with RPO NZZ) , Oil Pan Skid Plate Replacement (2500/3500 with RPO NZZ) .
Fig 3: Locating Differential Carrier Nuts
Courtesy of GENERAL MOTORS COMPANY
8. For both 1500 and 2500 series, support the front differential carrier with a suitable adjustable jack.
9. For 1500 series vehicles, remove the differential carrier right side nuts.
Fig 4: View Of Differential Carrier Bolts
Courtesy of GENERAL MOTORS COMPANY
10. Remove the differential carrier left side bolts.
11. Lower the differential carrier.
12. For 2500 series vehicles, remove the differential carrier right side nuts.
Fig 5: View Of Differential Carrier Lower Mounting Bolt
Courtesy of GENERAL MOTORS COMPANY
13. Remove the differential carrier upper mounting bolt and nut.
14. Remove the differential carrier lower mounting bolt and nut.
Fig 6: Locating Oil Cooler Hose Bracket & Adapter Bolts
Courtesy of GENERAL MOTORS COMPANY
15. If equipped with RPO L76 (6.0L) engine, perform the following:
    1. Lower the differential carrier.
    2. Remove the oil cooler hose adapter bolts (2).
    3. Remove the oil cooler hose assembly and gasket. Discard the gasket.
    4. Inspect the fittings, connectors, and cooler hoses for damage or distortion.
Fig 7: Locating Oil Cooler Hose Bracket & Adapter Bolts
Courtesy of GENERAL MOTORS COMPANY
16. If equipped with RPO LY6 (6.0L) engine, perform the following:
    1. Remove the oil cooler hose bracket bolt. (1)
    2. Remove the oil cooler hose adapter bolts. (2)
    3. Remove the oil cooler hose assembly. Discard the gasket.
    4. Inspect the fittings, connectors, and cooler hoses for damage or distortion.