Removal Procedure

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2008 GMC Yukon XL, 2008 GMC Yukon, 2008 Chevrolet Tahoe, 2008 Chevrolet Suburban, and 2008 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: View Of Oil Pan Skid Plate & 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: View Of Oil Pan Skid Plate & 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: Locating Oil Cooler Hose Bracket & 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: View Of Coolant Heater Cord

Courtesy of GENERAL MOTORS CORP.

Disconnect the coolant heater cord electrical connector.

Fig 5: Locating Coolant Heater

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IMPORTANT: 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.