Is there not a key slot in the driver's side door or the hatch?
ouch sometimes the key slot gets dirty [inside] I shot WD 40 in the slot and that freed it up. on a frozen key slot I used some freeze busting spray guaranteed to free a frozen lock. that worked, But right after it worked I sprayed WD in there to help dispell moisture and wash away the other stuff as my thought was to protect the finch/paint/chrome as much as I could. yeah my battery dies often in my Suburban in winter and sometimes the key just wont turn in the lock. So it gets sprayed to free it to clean it to lube it.
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