You will need to pull the transmission out or the engine out, which ever is the easiest for you. It has a solid round rear main seal that goes over the back of the crankshaft were the fly-wheel bolts to it.
you have eight main bolts. 10
It is in the main power distribution box under the hod.
under the hood in the power distribution box, maxi-fuses. gm Jim
There are many different features of a 2002 Chevrolet Silverado. Some of these features include a V-6 engine, chrome bumpers, an engine hour meter, and front and rear ventilated disc brakes.
How do you change a rear main seal on a 2001 Chevy 2500 HD long bed
Need to know the year and engine size and what it is in.
You will have to REMOVE the transmission and flywheel, Then pop the old seal out and drive the new 1 in.
if on a 4.8/5.3 or 6.0 you have to remove the main serpentine belt first then slide the 4 rib a/c belt off of the crank pulley while holding the tensioner back if you are replacing it with a new belt, hold the tensioner back and cut the belt unless you want it for a roadside spare.
NO
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Replacing the rear main seal on this engine requires complete crankshaft removal. It's a major job for the professional mechanic and should not be attempted by an amateur tinkerer.
inside the airbox