Per the Sears Outlet website: "We can connect to an existing gas line using a new gas connector. We cannot disconnect an old range if the gas shut-off valve is not above the floor, or if re-connecting is prohibited by local code" Also, different delivery options are available, with the premiere option allowing for complete unpacking of the range, removal of packing debris, hook-up, and installation. So it seems the only iffy thing is uninstalling your old range.
If they're doing the delivery they normally will install it to ensure it's working properly before they leave like they do with all other appliances they deliver.
Unfortunately I dont know but it isn't hard and there are ti s of YouTube videos of how to if the don't. As long as you can fi d the gas turn off valve it really isn't dangerous.
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