Have a 2001 Jeep Grand Cherokee Larado - Our son now has it up in Wisc.... for kayaking... below is email discussion...
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A friend had a flat tire, and could not get the lugnuts off - tire iron was too big, and would not fit them...
SO - here's an observation. I think I saw on our Jeep that a couple of the lugnuts had lost their silver covers... which should be solid on them. The tire iron is under the passenger side flip seat.
You might check this out and see if the tire iron will fit and turn both the normally covered silver lugnut, and the broken ones with the raw lugnuts showing.
If not, I would suggest buying some replacements, - I also seem to recall the front and rear are actually different sizes, depths, or something...
Just thought I would pass this along to fix now, in case you ever had a flat and would not be able to get the lugnuts removed due to mismatch between tire iron vs lugnut diameter.
see ya - Dad -
--------- Seems really stupid to have a nut with a cover that have two different sizes, and breaks off... I'll take a look at it. Probably will just get an 18mm lug wrench, throw it in the back, and be done. Sounds like they just break off after awhile.