91 lumina 3.1 engine Drove it into the garage shut it off will not start. No Spark. Replaced the coil pack about a year ago, It was used but no similar problems, stalling ext. Where is the crank sensor located? I looked all around the harmonic balancer but could not see any thing?

NO YEAR told for a CHALLENGE? year 2000 to 2022,wow !
NO COUNTRY TOLD.
check the FUSES FIRST !!!!!!!!!!!!!!!!!!
with 9 engines used, gas (petrol) , sure not diesel.
all are 4 cylinders and diff. sizes sure.
so he does not know his job , that it?
find one that does.? for sure.
we have no such car here in USA;
for a fact 22 years made the spark systems are NO THE SAME
not old how may coil (HV) packs there are
1 pack (distributor ) year 2000?
2 packs, called wasted spark and 2 or 4 HV spark wires
4in1 pack bricks. one giant pack with 2 coils inside wasted spark.
4 packs called COPS, coil over plugs (sparks)
there you go 22 years of evolution of spark (and more powerful)_
my guess it is 2pack car, (or 4 pack brick)
in both cases, 2 /4 , the young kids working or boomers will not know what wasted spark does. and wired it all up backward
1>4 3>2 (ecu firing order is 1,3,4,2 for ever fixed)
Wasted spark fires. TDC
example 1 fires real ,and 4 fires wasted. wasted means wasted fining on the exhaust stroke. ( and saves owning 2 extra coils)
the magic of just 2 coils wired in series.
but if 1 HV wire is open 2 sparks die, OOPS?
my 1975 honda CB750 had it so is not new ever, this tech
what matters most of all is moving the HV spark wires 1 by 1
never just throwing the wires there. guessing.
HV means the 20,000 volt high voltage wire set.
and last ( causes)_
Some are , even year 2000, had s fire wall igniter block that drives all coil packs and sure that can fail too.
later years the ignitor was moved to the COIL packs.(cops)
and last last, ECU bad to spark coil inputs.
new year told
no engine told
no country told
a hard row to hoe, or a tough nut to crack.

good luck finding real tech. how knows his craft and the evolution of it.(complex)

check fuel pump

what year ? chipped key ?

Check engine light on ? Code's ? What engine ? 2.3 l 4cylinder or 3.ol v-6 This vehicle has coil on plug ignition system , not coil packs ! a coil per cylinder . If new coils an still has no spark , has no B+ voltage to the coil or the PCM isn't controlling them . Without testing i'd only be guessing as to the problem .If the repair shop you had it to can only say it had to be the coils , I'd find another shop to take it to !
Autolite Coil on Plug Ignition troubleshooting

Your ignition spark control module is going bad,your coils pack are located right underneth them. this is what tells your coils packs to produce spark to your spark plugs. they are easy to replace just make sure you mark you coil pack with some tape and make sure you put them back in the same order as they came off the spark control module. Easy to replace,just make sure you use the proper size torx or socket size on the screw heads...

that code p0300 means your haveing a random muticyclinder misfire when your car stumbled and died it may have threw that code but it may be something else as the problem cars not smart enough to relize this it can be a faulty injector or one bad coil pack could be a cracked spark plug things have to be tested to determine the exact cause i had this same problem i i have a 2002 dodge intrepid it did the same thing as your car did

I also have a 91 chevy lumina with the same problem, have replaced the coil packs, throttle sensor, crank sensor and new spark-plugs and still the same problem. Also how many wires connect the the crank sensor as I have two wires that are discconected. Any help will be will better than replacing parts that I don't need to. I am disabled with MS and my car is my legs!!

Thanks Diane

check crank position sensor, run scanner for trouble codes , some auto parts will do this for free

Have you check the O2 sensors? How baout cleaning the MAF and Throttle body? Thermostat?

How does the temp gauge look whn it stalls?

not sure about the 2008 model, but the earlier ones had coil pack problems. it looks like part of the rocker cover with around four torque screws holding it down and one multi plug at the end on the n/s of the engine. oh they used to blow the fuse at the same time for the engine management. 30amp dooor pillar/"A"post area. test by removing the coil pack, fitting the spark plugs into the plug outlets. earth the body of each plug and crank the engine, you shoukld see a spark, if not then there are other tests before confirming the coil pack. let me know how you get on.