I can jump it with a screwdriver and it starts

a Chevy (got A/t trans or manual mt trans,?) sold with both new.
dead starter 101:
will not crank
so battery is good, this old never will it be.
so Jumper cable jump starts fail, ??????
its not a NOSTART, it is a NO CRANK.> the later is easy former not. easy even 50 causes of no starts.

yes the starter is GOOD is/ was good. as you proved hot wired it.
the causes are:
fuses blown or IGN fuse 50amp blown.?
Key switch bad.
starter relay bad. (the schematics online show no such thing)
that relay missing means the key switch can fail easy.
TRANNY rules.
PRNDL switch bad, , crank in Neutral now ,foot on brake..!
if M/T box, the clutch switch is bad, top of clutch pedal.
the clutch must be depressed or will never ever crank over.
but?
if shifter lever will not move, brake lamps are dead or fuse to it,.
starter motor bad,(not is it not you hot wired it and works.
Jumper cable jump cranking fails. (assumed)
the schematic on this car shows only 4 parts to fail, besides wires.
assumes battery good, or jump started cables fails.
fuse blown.
keyswitch bad (easy due to no starter relay)_
PRNDL or clutch switch bad.
starter.bad no it is not. and engine not seized no it is not.
I use volt meter to find the point of failure and never not found it.
wires bad.
sure!
2 battery cables. ,4 ends not loose or rusty.
or
some one put alarm on car and hacked cars wiring under dash and to the starter, or worse , hacks have no end,. and only tech that sees those hacks knows what to do, he removes the hack and puts the cars wiring back to OEM factory stock condition.
or worse, remote starter kits hacked in.
use a voltmeter and the schematic and find it.


https://eautorepair.net/Marketing/Default.asp

Look under dash. It works off the clutch pedal

ill answer for NO ELECTRICAL POWER :
sure and is easy with any DMM meter, got one? any $20 DMM.
my guess;1
engine will not crank
dash lamps out.
head lights out. dead.
post systems of electrical system , all parts that work and those that dont work, and problem is easy.
cleaned battery terminals.
tried borrowed battery that reads, 12.6vdc ? (charged is 12.6)
2012 that is in warranty car.... ?
my guess on 2012
jumping a car, that is battery jump starting.
a battery can short, and no jump start on earth will start shorted battery in car. but does lay down some big sparks, or burns up cheap walmart cables.
if the car will not crank, say just that, my starter motor will not crank
jump started from live running other car.
if true then make sure headlights work , if they dont work fix that first.
HL must always work, even keys in pocket.
best is to put a fully charged battery in the car, jump starting can cause
surges that can damage sensitive electronic$$$, do jumps as a desperate measure,
with a charged battery,
1: Head lights work, no fix that , use voltmeter
2: cranks robustly.
no , wiggle shifter lever, (on A/T cars the park switch blocks cranking) On M/T the clutch blocks cranking.
with any dMM
measure battery voltage before crank and during.
12.6v good. reseted.
cranking.
0 to 10v bad (weak battery or shorted starter motor)
11 and above good. and must crank, if not , starter is bad.
to prove starter is bad, check voltage at starter solenoid coil wire lug.
it must be at 11v cranking , below 8v it chatters, and fails.
if at 0v cranking this lug that means the Key start line is failing.
A/T switch not closes, or bad ignition switch.

Hi, diagnosing a no-start condition requires a logical approach to figuring out what might be preventing your car from starting. First, if the engine won't even crank over when you turn the ignition to START, your car obviously won't start.
When you turn the ignition key to start your car, voltage from the battery flows through the ignition switch to the Park/Neutral safety switch and/or brake pedal or clutch pedal safety switch (you have to push the pedal down before the circuit will complete) to the starter relay or solenoid. When the relay or solenoid is energized by voltage from the ignition switch circuit, it closes a contact that routes more power from the battery directly to the starter to crank the engine. The starter motor spins, pushes the starter drive gear to engage the flywheel and cranks the engine.

If the engine fails to crank, there is a fault in one of the components in the battery/ignition/starter circuit.

Ten Reasons why you car won't start..

1. Low battery (Check battery voltage, recharge if low, or jump start with another vehicle or battery charger).
2. Loose or corroded battery cables (Inspect, clean and tighten BOTH ends of BOTH battery cables).
3. Bad starter relay wiring connections or ground connection (Inspect, clean, tighten wiring connections).
4. Bad starter relay/solenoid (Check for voltage at relay, if relay has voltage but there is no "click" when key is turned to start, replace relay).
5. Bad starter (Jump battery voltage direct to starter to see if it spins, or remove starter and have it bench tested at auto parts store).
6. Damaged starter drive or teeth on flywheel (Remove starter and inspect drive gear and flywheel teeth, replace damaged parts if necessary).
7. Bad ignition switch (Check to see if voltage reaches starter relay/solenoid when turn to start. If not, check for open P/N switch and brake or clutch pedal switch. Replace ignition switch if defective).
8. Open P/N safety switch, or open Brake Pedal Safety Switch (automatic transmission) or open Clutch Pedal Switch (manual transmission). Bypass switch with jumper wire to see if engine cranks, or use test light or voltmeter to check for voltage passing through switch when ignition is turned to start.
9. Engine seized due to bearing failure or internal damage (Use socket and long handle to see if engine can be turned by hand, if not engine is locked up).
10. Engine hydrolocked due to coolant leak from leaky head gasket (Use socket and wrench to see if engine rotates, remove spark plugs and see if coolant comes out or engine can not be cranked with plugs out).

Hope it helps identify and solve the problem

Does the car crank with the new starter? If it does, then it might be fuel system or ignition system problem. Take one spark plug wire off, put a screwdriver in the wire and rest it near a metal object on the engine. Have someone crank the car while you watch for a spark jumping from the screwdriver to the engine. If so, then the problem is fuel related. Don't touch or hold the screwdriver while cranking, it will be shocking. Some ignition systems can stop your heart.

Easier to test in the car. Put starter back in the car. First, please try to jump start the car. If it will jump and start, starter is OK. If it will not jump start, go to the starter with a screwdriver. Use the screwdriver to short the big red-wire terminal to the small terminal on the solenoid. Be very careful not to short the big red-wire terminal to anything else, or you will get a big spark. If the battery, starter, and solenoid are good, the car will crank. If it does not crank, try again while jumping the battery to another car. If it cranks, the battery is low or the terminals need to be cleaned and tightened. If you have more questions, please reply.

Won't crank? What about relays? Can you safely jump across back of starter with screwdriver? (positive to positive jump) Starter should crank while you do this (don't let screwdriver touch positive and negative) like body of starter . Electrical short can burn you or blind you. Don't attempt if unsure.

If starter will crank by jumping then at least you know what you are looking for.

You will need to verify if the starter solenoid is getting power when you are attempting to crank it. I dont have a diagram, but the clutch switch may be the problem if you must depress the clutch to start the engine.

Yes, there is a clutch switch which must be activated (closes switch) for the starter to engage. This is a safety item so the truck won't start in gear. With time it may begin to fail, this should be any easy fix. And yes from time to time you may not be pushing the clutch in far enough to actuate this switch.
I hope this may have helped,
Tom

check fuel pressure.if not above recomended spec. replace fuel pump. for starting have solenoid 0n starter checked.