Warranty: This genuine part is guaranteed by GM's
factory warranty.
Fits the following Vehicles:
1988-1995, 1986 GMC C2500 | Base, High Sierra, Sierra, Sierra Classic, Sierra SL, Sierra SLE, Sierra SLX | 6 Cyl 4.3 L GAS
GMC C2500 Oil Pan
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GMC C2500 Oil Pan Parts Questions & Experts Answers
A: Before changing the Oil Pan, begin with disconnecting the negative Battery Cable. Should the car have four-wheel drive, take out the front Differential. Next, get rid of the underbody shield and the Oil Pan underbody shield and also take out the cross brace if it exists. Drain out the engine oil and get rid of the engine Oil Filter. After that, unbolt the lower transmission-to-Oil Pan, cut off the electrical cable from strain gauge block and remove two front wiring harness connections on the engine Oil Pan. Take out the engine oil cooler pipe from the Oil Pan bolt and the transmission oil cooler pipe retainer and bolt as well. Then, take away the Starter motor and the cover and fastener on the left and finally remove the engine Oil Pan. Before the installation, apply a 5 mm (0.20 inch) bead of sealant gm p/n 12378190 or its equivalent to both the engine block and the front and rear cover's protruding gasket tabs that contact the Oil Pan. Set the Oil Pan Gasket onto the Oil Pan before installing the whole assembly with tightened bolts to the engine block. Place the two lower bellhousing bolts to properly fix the Oil Pan and tighten them with your fingers. Fix the Oil Pan-to-block, Oil Pan-to-Oil Pan front cover and Oil Pan-to-rear cover bolts to a tension of 25 n.m (18 lb ft) and tighten all the bellhousing bolts to 50 n.m (37 lb ft). Put back the left closeout cover and bolt and make sure to tighten the Oil Pan closeout cover bolt to 9 n.m (80 lb in). Make sure to fit the Starter motor, secure the transmission pipe retainer and bolt it to the Oil Pan, plus the oil cooler pipe to the Oil Pan and fasten the oil cooler pipe nut at 10 n.m (89 lb in). Fix the engine wiring harness retainer bolts into the engine Oil Pan, fitting the oil level sensor electrical connector and attach the transmission to Oil Pan bolts, tightening them until you reach 55 n.m (41 lb ft). In case your vehicle is equipped with four-wheel drive, replace the front Differential and finish by putting the underbody shield back on. Turn the vehicle upside down, top up the engine with motor oil and insert the Oil Filter before you replace the negative cable.