Removal Procedure

WARNING: This page is about a different car, the 2007 GMC Sierra and 2007 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: View Of Oil Pan Skid Plate & Bolts

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Drain the cooling system/engine block. Refer to Cooling System Draining and Filling (Static Fill) or Cooling System Draining and Filling (Vac-N-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

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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

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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

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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.