Never had an issue with fuses before, and all of the sudden, the car took a turn for the worse. It's blowing the 350 amp fuse to the wire going to the starter solenoid.... Put a new Starter (against my own judgement), and still does the same thing.... I tested the old starter, and it was fine, not blowing anything during the test... any advices, please.

 

What year and engine is this truck?

Where is this 350A fuse that you say is blown?

George

 

Its a 2020 chevy Blazer V6.... its the fuses connected to the battery positive terminal....

 

Sorry, I don't have any wiring diagrams past the 2nd gen blazers.

George

 

"It's blowing the 350 amp fuse to the wire going to the starter solenoid."

Which "wire to the solenoid" there are TWO of them. The "solenoid" wire (smaller one) only supplies about 10-20 amp to the solenoid.

You must mean the LARGE wire to the big stud on the solenoid? If thats blowing:

1) RISK OF FIRE. That much current can cause enough heat to melt/ignite things. Also keep your FACE away from that fuse link so pieces dont explode and hit you in the face. Fuses can break (crack), melt or VIOLENTLY EXPLODE.
2.) Starter windings shorted, time for a new one
3.) check that the large wire isnt pinched against the engine mount or upper Control Arm

On my "old" truck, the wires go down to above the Crossmember, then under the engine mount and up, to be away from the hot exhaust manifold.

 

Daveca.... Thanks for the answer.... yes, there is only one high amps cable from the battery, the other two are solenoid activation.... hear what I found out so far... The fuse indeed is to protect from high amps on the wire and possible starter fire.... the starter is good.... now when it's trying to turn the engine over, something is keeping the engine from rotating in the direction of starting rotation. I rotate the engine via dampener bolt, and it only rotates in one direction, opposite of starting rotation, when I try to rotate the other way, it will not go... I'm assuming some bolt or something got loose and felt down, and it's stuck in the timing chain.... "Only assuming".... cause it will not turn at all to one side.... but it will in the other direction, so of course, when the starter tries to start, the fuse (which is protection) blows.... will find out more once i start to disassemble...

 

Were you able to get this problem fixed? I just had the same thing happen this week with my 2020 Blazer. Had it towed to the dealership and they're struggling but are reaching out to GM for help. Sounds very similar - fuse blew, screen said the battery had low power and to put it in neutral and pull over. Couldn't get it going again, wouldn't jump start...dealer replaced amp and starter but it sounds like it blew again. Seems like every time I get an error message on the screen it's totally unrelated to the actual problem. Just curious if you figured it out.

 

Yes I did.... Here is the summary of events.... Wife drives Blazer, Blazer engine stopped suddenly and cannot turn over, tow truck tows blazer to our house. I tried with different fuses, I was able to turn engine via socket on main pulley, but not via key 'thus blasting many fuses'. New starter replaced even though I new "stupidly" it was not going to resolve the issue (cause I tested the old started separately). so I decided to give mechanic the job. Blazer towed again to mechanics this time. Mechanic summary was as follows; since the engine was already to believe seized, then we (mechanic said) proceded to turn it over without the fuse, heard a whistling sound and "voila" the engine turned and started.... end result "A/C compressor seized "big hole on the side" and not allowing the engine to turn, cause the seizing was stronger than the fuse opportunity to make the engine turn... (note: we did not noticed about the lack of cooling cause the engine was not running), replaced compressor and end of problems.