Installation Procedure

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Important:

The alignment of the structural oil pan is critical. The rear bolt hole locations of the oil pan provide mounting points for the transmission bellhousing. To ensure the rigidity of the powertrain and correct transmission alignment, it is important that the rear of the block and the rear of the oil pan must NEVER protrude beyond the engine block and transmission bellhousing plane.
Do not reuse the oil pan gasket.
It is not necessary to rivet the NEW gasket to the oil pan.

Apply a 5 mm (0.20 in) bead of sealant GM P/N 12378190, or equivalent 20 mm (0.80 in) long to the engine block. Apply the sealant directly onto the tabs of the front cover gasket that protrudes into the oil pan surface.

Fig 1: Applying Sealant Directly Onto Tabs Of Front Cover Gasket
Courtesy of GENERAL MOTORS CORP.
Apply a 5 mm (0.20 in) bead of sealant GM P/N 12378190, or equivalent 20 mm (0.8 in) long to the engine block. Apply the sealant directly onto the tabs of the rear cover gasket that protrudes into the oil pan surface.

Fig 2: Applying Sealant Directly Onto Tabs Of Rear Cover Gasket
Courtesy of GENERAL MOTORS CORP.

Important: Be sure to align the oil gallery passages in the oil pan and engine block properly with the oil pan gasket.
Pre-assemble the oil pan gasket to the pan.
- Install the gasket onto the pan.
- Install the oil pan bolts to the pan and through the gasket.
Install the oil pan, gasket and bolts to the engine block.
Tighten the oil pan bolts until snug. Do not overtighten.

Fig 3: Installing Oil Pan, Gasket & Bolts To Engine Block
Courtesy of GENERAL MOTORS CORP.
Install the transmission converter cover bolts until snug, if equipped with the 4L80-E automatic transmission.

Fig 4: Installing Transmission Converter Cover Bolts
Courtesy of GENERAL MOTORS CORP.
Install the transmission bolt and stud on the right side until snug, if equipped with the 4L60-E automatic transmission.

Fig 5: Installing Transmission Bolt & Stud On Right Side
Courtesy of GENERAL MOTORS CORP.

NOTE: Refer to FASTENER NOTICE in Cautions and Notices.
Install the bottom bolt on the left side until snug.
Tighten
1. 8.1. Tighten the oil pan-to-front cover bolts to 25 N.m (18 lb ft).
2. 8.2. Tighten the oil pan-to-rear cover bolts to 12 N.m (106 lb in).
3. 8.3. Tighten the converter cover, and transmission bolts/stud to 50 N.m (37 lb ft).
Fig 6: Installing Bottom Bolt On Left Side
Courtesy of GENERAL MOTORS CORP.
Install the positive battery cable clip bolt.
Tighten

Tighten the bolt to 9 N.m (80 lb in).

Fig 7: Installing Procedure Oil Pan (7 Of 16)
Courtesy of GENERAL MOTORS CORP.
Slide the channel pin in to the oil pan tab.
Install the battery cable channel bolt.
Tighten

Tighten the bolt to 12 N.m (106 lb in).

Fig 8: Installing Battery Cable Channel Bolt
Courtesy of GENERAL MOTORS CORP.
Connect the oil level sensor electrical connector (6).

Fig 9: Connecting Oil Level Sensor Electrical Connector
Courtesy of GENERAL MOTORS CORP.
Install the transmission cover and bolt.
Tighten

Tighten the bolt to 12 N.m (106 lb in).

Fig 10: Installing Transmission Cover & Bolt
Courtesy of GENERAL MOTORS CORP.
Install the crossbar.
Install the crossbar bolts.
Tighten

Tighten the bolts to 100 N.m (74 lb ft).

Fig 11: Installing Crossbar & Bolts
Courtesy of GENERAL MOTORS CORP.
If equipped, install the oil pan skid plate.
Install the oil pan skid plate bolts.
Tighten

Tighten the bolts to 20 N.m (15 lb ft).

Fig 12: Installing Oil Pan Skid Plate & Bolts
Courtesy of GENERAL MOTORS CORP.
Install the transmission cover bolt.
Tighten

Tighten the bolt to 12 N.m (106 lb in).

Fig 13: Installing Transmission Cover Bolt
Courtesy of GENERAL MOTORS CORP.
Raise the front drive axle into position.
If equipped with 4WD, install the differential carrier upper mounting bolt and nut until snug. Do not tighten at this time.

Fig 14: Installing Differential Carrier Upper Mounting Bolt & Nut
Courtesy of GENERAL MOTORS CORP.
If equipped with 4WD, install the differential carrier lower mounting bolt and nut.
Tighten

Tighten the bolts to 100 N.m (75 lb ft).

Fig 15: Installing Differential Carrier Lower Mounting Bolt & Nut
Courtesy of GENERAL MOTORS CORP.
If equipped with 4WD, install the inner axle housing washers and nuts to the bracket.
Tighten

Tighten the nuts to 100 N.m (75 lb ft).
Remove the jack from the front drive axle.
Install new engine oil and a new oil filter. Refer to ENGINE OIL AND OIL FILTER REPLACEMENT .

Fig 16: Installing Inner Axle Housing Washers & Nuts To Bracket
Courtesy of GENERAL MOTORS CORP.