Changing oil pan gasket on 2007 3.5L Impala.I need step by step instructions.

SOURCE: how much will it cost for a mechanic to change oil pan gasket on my 1998 chevy blazer 4wd big v6 engine?

Gasket = $35 (permatex rubber)
Labor - my manual says 3 hours.
You'll have to be responsible for figuring out the labor price per hour depending on where you are located.
In MI, a garage is about $50/hr, and dealership = $85/hr
CA might be $95/$150/hr.

Parts are minimal on the job - its all labor.
Figure in about $20 for shop supplies... gasket remover, sealant, rags, etc.

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SOURCE: replac 2003 monte carlo oil pan gasket

To remove the oil pan on any vehicle, first remove anything obviously in your way...starter, exhaust pipe etc. Then disconnect the engine mounts and raise engine to gain sufficient clearance between frame and pan. You cannot support the engine from under the pan so either use a fixture above the engine or put blocks between mounts and engine to support it. After all rail bolts have been removed, remember that the oil pump pickup will interfere with removal somewhat but pan can be maneuvered around it. Anything preventing you from getting the pan out will then need to be removed or moved as they are identified. Be careful when raising the engine that you do not break anything above it as it comes up.

SOURCE: (HOW LONG DOES IT TAKE) replacing oil pan gasket

If this is being done in the back yard and using air tools to speed up things it can be done in 2.45hours

SOURCE: Is there ANY way to change the oil pan gasket on a S10...

Remove motor mount bolts and rear transmission crossmember bolts or nuts,suppport engine/trans. see if u have enough clearance between pan and axle remove pan. if not, split the exh away from the manifolds. worth a try

SOURCE: changing oil pan gasket on 02 impala ls 3.8

The engine does have to be raised. The bolts are not easy to get to until the engine is lifted and the engine mount is removed. I'm doing this job right now and the book time is around 5 hours.