No crank no start 01 tahoe..never had any issues b4 this....

No crank no start 01 tahoe..never had any issues b4 this..fuses are good relays are good..12.6 in battery. No corrosion. Good grounds... security light is not flashing when i turn to on position...where to turn next Mechanic's...

No crank no start 01 tahoe..never had any issues b4 this..fuses are good relays are good..12.6 in battery. No corrosion. Good grounds... security light is not flashing when i turn to on position...where to turn next Mechanic's Assistant: Does the light flash, blink or stay solid? Have you tried to reset the security system? Nope..n its not acting outta the norm..the security light that is Mechanic's Assistant: Are you fixing your Tahoe yourself? What have you tried so far? Yes n tested all fuses,relays n power

Automotive Expert
Hello and welcome! My name isCustomerand I can assist you with your question. I am a former master tech and I have worked in this field for 20 years. I specialize this type of problem you are experiencing so I am confident I can assist with this issue. I am sorry you are having this issue and I understand this can be frustrating so I will try my best to help. While we are working on this issue together, please allow up to 30 minutes (or more) between replies as I might be online helping other customers or offline spending time with family. Please understand I can only see what is on this page and what you have already shared with me. I don’t know the all of the vehicle history and I don’t know your mechanical ability, but I will try my best to help. I am going to start by asking some basic questions to get up to caught up to where you are at with this situation so I can assist you in a timely manner. I appreciate your time and patience while we are working together on this issue. My goal is to provide you with a pleasant experience and ensure all of your questions are answered. Please reply back at anytime so I can fully answer or address any questions or concerns you may have. Please download or save any documents or images I may send you as they will automatically expire after 7 days. Can I start by getting your first name? Thank you

Automotive Expert
Thank you Lisa. You are saying the [engine](/topics-engine-chevy/) does not crank over and all fuses are good and there is no security light on or flashing? Have you checked the starter or the starting circuit?

I havent pulled the starter yet.. i have lights,radio, clicking,i dont hear fuel pump either, as if im not even turning the key..thought security issue..but my security light is acting normal
Automotive Expert
Have you checked for codes in the computer?

Just sensor code comes up..which it did b4 thisO2 bank 1
Automotive Expert
Thank you. Start by checking the inputs to the starter relay to see what is missing if the relay is not activating. It needs two powers and one ground to operate. Pin 85 should have power going into the relay comes from the ignition switch and PNP or transmission range switch with the key in the CRANK or START position. Pin 86 should have ground at all times.

I swapped out my starter relay and ignition relay with the headlamp relay..nothing
Automotive Expert
NO. I am not saying the relay is bad. I am recommend that you check the inputs to the starter relay

How do i do that
Automotive Expert
This would be done using a test light or a voltmeter. If your are SURE all fuses are good, and the relay is not activating when turning the key, this would suggest a faulty ignition switch or transmission range switch. If the starter relay is clicking like it should when turning the key, this would suggest the starter is getting power but not working because it is a faulty starter. It has been a pleasure working with you so far. Keep in mind this is a “starting point”. We can always continue as needed at a later date or at any time. Feel free to run some tests and reply back for further assistance as needed. Glad I can help. Please let me know if you have any further questions. Thanks and have a great day!

The relay is Not clicking
Automotive Expert
Ok then it is missing an input like I suspected. You will need to confirm which input is missing using a test light or a voltmeter.

Ok ill go do that now
Automotive Expert
Sounds good

Sooo i pulled the ignition switch n sprayed some canned air on it..i ordered a new 1 itll b here tomorrow..i also noticed my steering wont lock ..n i grabbed a new battery n threw that in..well now my headlights come on wo the key being in..what the f\*\*k
Automotive Expert
Lets replace the ignition switch and retest the system. We'll go from there. I will be looking forward to your reply.

Having do i remove the additional wire from the old to add to the new



These are the 4 additional wires in my hand

Nvm. Got it

Soo changed all that..still the same no crank no start no power other then lights,radio,etc
Automotive Expert
Hello! Can you speak on the phone? I can walk you through this diagnoses over the phone right now

I tried to call it tells me to change my numbers url...i dont even kno what that means
Automotive Expert
There should be a pop up on your end that you need to click on to accept my phone call offer. It will have my phone number in the offer. The number you are texting to is not my number. There is an additional cost for a phone call. Yes I'm confident I can help with this issue. If you don't see a pop-up, you will need to disable your pop-up blocker on your device.

No pop up blocker..Anyway...could this b the starter?
Automotive Expert
Yes it's possible. You can verify this by checking for power down at the start of using a voltmeter a test light.

I only have multimeter
Automotive Expert
Yes that will work

What am i touching each end to n what setting should i have it on

Customer attachment 8/13/2020 7:56:00 PM
Automotive Expert
The auto ranging section should work. If not, try the yellow 2 through 600 volts DC setting

N touch them where?
Automotive Expert
Red lead goes to the terminals at the starter and the black lead goes to battery ground.

Guess ill rip it out n take it to b tested...
Automotive Expert
Sounds good

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