It sounds too late now... but the dealer provides ignition cylinders
and key matched to the VIN number.

So when an ignition goes bad you can replace it with an exact match that matches doors and trunk locks. And only have one key to deal with.

I have removed door locks and cleaned and lubed which made them work better. I have not tried to match a door lock to an ignition lock.

__________________
80 300D 340K Owned 30 yrs
83 300SD 440K Owned 9 yrs - Daily Driver 150mi/day
02 Z71 Suburban 117,000
15 Toyota Prius 2600 miles
00 Harley Sportster 24k
09 Yamaha R6
03 Ninja 250