Someone stuck toothpicks in the trunk lock of my 2000 Chevy Impala.

No free ones unfortunately Anne, $9.98 here

https://www.lrbservices.net/product/babylock-model-bl-1550-instruction-manual-pdf/

https://www.google.com/search?q=baby+lock+1550+Companion+manual

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It sounds like something is stuck inside after the stabilizer got jammed. Carefully open your machine; start with removing the needle, the presser foot, the bobbin, needle plate (if possible) and start looking around. I use a toothpick to gently (gently) remove dust balls, thread, etc from the machine. My thread was breaking and I found a little thread stuck inside. Once I removed the thread, the machine worked fine again.

Clean them with a q-tip and/or toothpick. Often lint gets in the groves and is hard to see but once cleaned they can move again.

I think you mean the buttons have stuck. Try reading the manual for this unit and if you no longer have the manual, you could try to use a toothpick to gently try to encourage Tue buttons to unstick. Many of these use a small button to release the covers or a screw that can be removed with a screwdriver to gain access.

Is the reverse switch stuck ? Sometimes they get a lot of gunk around them that sort of builds up and stops them moving, and it may be on the inside, rather than where it's easy to see. Might try to use something very slender, maybe a nail file or toothpick to see if you can remove anything from around the switch. Maybe a wee drop of penetrating oil may help dissolve any gunk that's stuck around it, but put a towel under to catch any that leaks through. If possible, remove the screws in the machine body to see if you can remove the exterior casing and get at the underside of the switch. If the switch appears to be ok, I think you'll need a repair shop.

When you say it was cleaned, do you mean on the outside, maybe the bobbin case, or did you have it serviced, where someone removed the casing and cleaned and oiled the entire working assembly inside ? If so, did they guarantee the work ? Most shops give you at least a month on their repairs, but that might not be any help by now and believe me I know how expensive it can be to get repairs done.

Do you have the model number ? Sears used to be pretty good at repairing their machines but they're not as good as they used to be, I'm afraid. But Kenmore is a common brand and most repair shops should be able to mend them unless it's a part they can't get hold of. Ebay can be a good source for parts like that.

This happened to me once. I know it happens for different reasons. My problem was a thread 'locked' under the bobbin carriage. I opened the machine underneath, where is only one screw and found the thread locked between two wheels. If this is not your case, maybe inside the upper case? Also try to change the needle, and make sure there is not other strange object inside the hoop arm, or the bobbin cage.

Singer Athena 2000 won't feed properly, feed dog ok, circuit board.
When top is removed there are four adjustments that have red dots, I think I need to adjust one of them. Can you give me advice.

if your chevy has a v8 the firing order is 18436572 if v6 4.3L 164352

A FRIEND GAVE ME A SUPERLOCK 2000 WITH THE SAME PROBLEM. THE HANDWHEEL WAS HARD TO TURN AND MACHINE WONT RUN WHEN PLUGGED IN. I OPENED THE SIDE COVER WHERE HANDWHEEL IS LOCATED. FOUND THE BELT WAS DRIVEN OFF THE MOTOR. PUT ON THE BELT ON THE MOTOR, OILED THE MOVING PARTS.
WOKRING GREAT NOW.

If you have mice in the house, they may have gotten around the moving parts underneath and urinated and so forth on the working parts. My dad had go in and use a break-free lubricant and physically force the gears to move again in order to free up the working parts. It was bad. Would'nt move at all. Now it moves good again, but I have to find someone to fix the timing of the gears. It's out of timing, but it moves again.