GM 12612257
Oil Pan

Replacing the Oil Pan requires front suspension crossmember removal and draining the engine oil before removing the engine Oil Filter to empty the fluid contents. Disconnection of automatic transmission fluid cooler lines should be followed by removal of the engine oil level sensor electrical connector before extracting the oil level sensor and securing all Oil Pan bolts for easy removal of the Oil Pan. Begin by cleaning the Oil Pan before applying a new Oil Pan gasket to the oil manifold plate and setting the Oil Pan into position against the crankcase with a 0.50 mm (0.020 inch) space forward from the engine block's rear face. Following Oil Pan retaining bolt installation, use a torque tool to secure them at 25 nm (18 ft. Lbs.). The oil Drain Plug installation requires 25 nm (18 ft. Lbs.) of torque. Fasten the engine oil level sensor into place with 20 nm (15 ft. Lbs.) before you connect the electrical connector to the sensor and install the automatic transmission fluid cooler lines. After tightening the new engine Oil Filter to 30 nm (22 ft. Lbs.) you should install the Oil Pan Drain Plug with 25 nm (18 ft. Lbs.) torque. Place the front suspension crossmember back into position before filling the crankcase with proper engine oil grade and quantity while checking transmission fluid level and testing the engine for any leaking areas.

First wash out the front suspension crossmember and drain the engine oil before removing the engine Oil Filter to complete drain off. You should start by disconnecting the engine oil level sensor electrical connector then remove the automatic transmission fluid cooler line mounting clips before removing the oil level sensor itself. Begin by removing the Oil Pan bolts followed by the Oil Pan and drilling out the Oil Pan Gasket rivets before disposing of the old gasket. Inspection of the Oil Pan must take place before new gasket installation when rivets are omitted on the Oil Pan surface. Place the Oil Pan in the lower crankcase space with front edges positioned 0.50 mm (0.020 in) ahead of the engine block's rear contour. Initial bolt torques for the Oil Pan should be set at 15 n.m (11 lb ft) before tightening them to 25 n.m (18 lb ft). Screw in the oil drain plug then place torque at 25 n.m (18 lb ft). After installing the engine oil level sensor into the Oil Pan you should securely fasten it to 20 n.m (15 lb ft) before connecting the electrical connector. The automatic transmission fluid cooler lines should receive their clips back while you place a brand new engine Oil Filter which requires a torque of 30 n.m (22 lb ft). Reinstall the front suspension crossmember before you fill the crankcase with the recommended oil grade while performing an oil leak test under engine operation.

Use a new oil pan gasket without riveting it to the oil pan, position the oil pan to the lower crankcase, and hold it flush to 0.50 mm (0.020 in) forward of the rear face of the engine block.

Remove the automatic transmission fluid cooler line mounting clips and disconnect the engine oil level sensor electrical connector.