Removal Procedure

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2011 GMC Yukon XL, 2011 GMC Yukon, 2011 Chevrolet Tahoe, 2011 Chevrolet Suburban, and 2011 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Oil Pan Skid Plate And Bolts

Courtesy of GENERAL MOTORS CORP.

Drain the cooling system/engine block. Refer to Cooling System Draining and Filling (Static Fill) .
Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
For 1500 series vehicles, remove the oil pan skid plate bolts and plate, if equipped.

Fig 2: Oil Pan Skid Plate And Bolts

Courtesy of GENERAL MOTORS CORP.

For 2500 series vehicle, remove the front 2 oil pan skid plate bolts, loosen the 2 rear bolts and remove the skid plate, if equipped.

Fig 3: Oil Cooler Hose Bracket And Adapter Bolts

Courtesy of GENERAL MOTORS CORP.

For vehicles with regular production option (RPO) LY6 (6.0L) perform the following steps otherwise proceed to step 10.
Remove the oil cooler hose bracket bolt (1).
Remove the oil cooler hose adapter bolts (2).
Remove and discard the oil cooler hose adapter gasket.
Reposition the oil cooler hose adapter end out of the way.

Fig 4: Coolant Heater Cord

Courtesy of GENERAL MOTORS CORP.

Disconnect the coolant heater cord electrical connector.

Fig 5: Heater

Courtesy of GENERAL MOTORS CORP.

NOTE:

Do not score the surface of the engine block hole when removing the coolant heater.

Remove the coolant heater from the engine block.
Remove any burrs, sealer, or other rough spots.