Check the Owner's Manual - it tells it just like Doug says.
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Pg 10-55
This vehicle may come with a jack
and spare tire or a tire sealant and
compressor kit. To use the jacking
equipment to change a spare tire
safely, follow the instructions below.
Funny they still have the language in the OM about the spare being good for 70 MPH.
Pg 10-68
After installing the spare tire on the
vehicle, stop as soon as possible
and check that the spare is correctly
inflated. The spare tire is made to
perform well at speeds up to
112 km/h (70 mph) at the
recommended inflation pressure, so
you can finish your trip.
To me, the manual should also state that in addition to stopping to check pressure, the other step(s) should be to verify correct wheel nut torque and to ensure TPMS is indicating the replacement/spare now in use properly. It does that in a back-handed way, I suppose, but I'm surprised it's not more detailed in nature.