Where is the best place to put the jack to lift the motor on 99 gmc sierra to replace oil pump, to take the pan off, have motor mounts loosened and oil pan bolts out. what else needs to be removed?

You may have to loosen the transmission also to get enough room to remove it without taking the motor out. Make sure your pan is not cracked first. Also be careful when lifting the motor as to not damage anything on top of the engine.

Jack up truck for safety sake put jack stands under frame . remove all engine oil remove all bolts holding oil pan on if their is not enough room to drop pan you may have to remove bolts holding motor mounts and jack up engine. if front end linkage is still in the way remove linkage. pull oil pan out. check gasket that was between block and oil pan if any stuck to block of engine remove with gasket scraper or wire brush or wire wheel on drill.make sure mating surface is clean put new gasket on new oil pan I like to use a high temp sealer on gasket both sides. Put pan with gasket back in place of old oil pan and tighten all bolts. jack engine down ,replace moter mount bolts replace any linkage you took apart. and dont forget to replace engine oil. make sure oil plug is in pan before pouring oil in . before starting engine check that no oil is leaking than start engine and check for any leaks again if all is good your done. if this was helpful please leave good feed back. A good temp fix on a rusted oil pan is JB weld make sure no oil is on pan clean with towel and rubbing alchol .you may have to drain oil first. if it is rusted badly you may have to use a wire brush on a drill to clean the area to patch. if patched properly it may last for years.

yes you do. place a floor jack under engine with a block of wood on top of jack to protect the engine, put just enough pressure on jack to steady engine. remove motor mount, then jack up engine a bit to take belt off. replace the belt then lower jack and attach the mount. on the mount only the outside bolts need to come off to raise engine. do not remove from engine side unless you are changing it or its bad, be carefull when raising engine, pick it up from a sturdy place, not the oil pan. have a good day !!

You may have to loosen the engine-to-frame mounts and slightly raise the motor to access these. Always use jack stands when lifting something as heavy as the engine for safety.

Does it feel like the motor is jumping when it shifts? Check to see if you have a bad motor mount. Jack your car up and put on jack stands. Place a floor jack under the oil pan and jack it up gently to see if the motor lifts up higher than normal. If so replace the motor mount that is bad. Hope this helps. Please comment. Put a piece of wood between the jack and the oil pan so you won't dent the pan.

lossen motor mounts and sligtly jack up motor if that dont work you will have to losen oil pump ***.and remove with pan

"The" motor mount implies one of the three (actually the rear on is a transmission mount).
Loosen the bolts on the mounts that you are keeping.
Next, place a 2x6 about 1 ft long under the oil pan and place a jack under the oil pan and 2x6 board.
Apply pressure (just a little) to the jack.

Now, remove the bolts that hold the bad motor mount. Apply enough lift on the jack to get the engine weight off the motor mount (and no more).

Next, knock out the bad mount and insert the new mount. Insert the bolts (hand tighten).

Next, lower the jack until the block rests on the new mount. Tighten the other motor mount bolts and the new mount bolts (torque to about 35 Ft. lbs.)

You are done!

You need to loosen the motor mount slightly--just a full turn or two. Place a jack under the oil pan and lift the engine until the strain is relieved on the motor mount and finish removal. Replacement installation is the opposite except you'll want to tighten the new motor mount into place fully (if possible) before lowering the jack.

it is in deed a tough job you have to use a piece of wood under the oil pan and gently lift the motor using a hydraulic follr jak

just put the jack under the engine with a board in between the oil pan and jack, raise up a little unbolt the mount, jack up more, you might have to loosen other motor mounts but you should be able to squeeze out the mounts with ease or a little prying of a pry bar, its much simpler then most would think, just did it on 2 awd turbo eclipses last week, you can also buy a polly urithane kit and knock out the guts of the mounts and replace with the pollys for pretty cheap. im in iowa if you need help let me know.