[W-P]

Check the Scriptfiles folder and locate to file called: famvehicles.ini, edit:

407|1920.983398|-1859.192016|15.061939|353.528289|-1|-1|13|0 (Firetruck)
407|1949.617553|-1871.079833|15.061939|1.501024|-1|-1|13|0 (Firetruck)
407|1941.067016|-1854.081787|15.046875|76.501174|-1|-1|13|0 (Firetruck)
407|1903.970458|-1863.689697|15.064661|0.861392|-1|-1|13|0 (Firetruck)
596|1535.764892|-1668.237060|14.882802|358.783569|-1|-1|13|0 (LSPD - iD78 )
560|1651.690917|-1879.902954|15.043828|69.129592|-1|-1|13|0 (Sultan - iD79)
567|1420.990356|-1349.663208|15.067347|18.979946|3|3|0|0 (Other near LSPD)
492|1425.265380|-1336.334350|15.079997|356.727630|2|2|0|0 (Other near LSPD)
466|1424.399414|-1312.032958|15.054687|169.141098|9|9|0|0 (Other near LSPD)


Save, and youґre done.

PS: As you noticed, the last number of line was 1, after change, 0, it means Locked (1), Unlocked (0).
PS2: You can also teleport to the vehicle, using vehicle spawn-coord. /gotoco x y z int.
Example: /gotoco 1920.983398 -1859.192016 15.061939 0 (firetruck)