Oil Pan Cleaning and Inspection

WARNING: This page is about a different car, the 2008 GMC Sierra, 2008 GMC Cab & Chassis Sierra, 2008 Chevrolet Silverado, and 2008 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: View Of Oil Filter Fitting

Courtesy of GENERAL MOTORS CORP.

Remove the oil filter fitting (438), as required.

Fig 2: View Of Oil Pressure Relief Valve Components

Courtesy of GENERAL MOTORS CORP.

Remove the active fuel management oil pressure relief valve (455) and washer.
Inspect the oil pressure relief valve for proper operation. Lightly depress the valve (2). The valve spring (1) should seat the valve to the proper closed position.

Fig 3: View Of Oil Level Sensor & O-Ring

Courtesy of GENERAL MOTORS CORP.

Remove the oil level sensor (727) and O-ring (728).

Fig 4: View Of Baffle & Bolts

Courtesy of GENERAL MOTORS CORP.

Remove the bolts (427) and baffle (428).

Fig 5: View Of Oil Pan Cover, Bolts & Gasket

Courtesy of GENERAL MOTORS CORP.

Remove the oil pan cover (434), bolts (435), and gasket (433).
Clean the oil pan in solvent.

CAUTION: Refer to Safety Glasses and Compressed Air Caution .

Dry the oil pan with compressed air.

Fig 6: View Of Oil Pan Inspection Points

Courtesy of GENERAL MOTORS CORP.

Inspect the oil pan for the following conditions:
- Damaged gasket surfaces (1)
- Restrictions within the oil passages (2) of the pan
- Damaged oil filter seal surface (3)
- Threaded oil level sensor hole (4) for damage