How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask AZTechBrian Your Own Question
AZTechBrian
AZTechBrian, ASE Certified Technician
Category: Chevy
Satisfied Customers: 708
Experience:  Owner
77606712
Type Your Chevy Question Here...
AZTechBrian is online now
A new question is answered every 9 seconds

Same as whats going on in this post, 02 trailblazer, 2002,

Customer Question

same as whats going on in this post
JA: What is the model/year of your Chevy?
Customer: 02 trailblazer
JA: What year is your Chevy?
Customer: 2002
JA: Are you hoping to fix this yourself? What have you tried so far?
Customer: replaced the selonid on the floor
JA: Anything else you think the mechanic should know?
Customer: car doesnt start anymore
JA: Have you checked the battery, particularly the terminal connections? Are they corroded?
Customer: they are fine
Submitted: 5 months ago.
Category: Chevy
Expert:  AZTechBrian replied 5 months ago.

Hello. I don't see a description of the issue your having. What's the problem your having?

Customer: replied 5 months ago.
it shifts freely and the key didnt want to come out but i opened up by the column and pressed the button and it releses but now the car still shifts freely and now doesnt want to start
Expert:  AZTechBrian replied 5 months ago.

it sounds like something with your shift linkage. When you say it shifts freely, does it feel like the gear selector is not connected anymore? or more like it's just sloppy and loose? If you push the gear selector in park and put a little pressure on it will the engine start then?

Customer: replied 5 months ago.
im a mechanic but i needed the help i replace the shifter cable thats not the issue it shifts without pressing the brake
Expert:  AZTechBrian replied 5 months ago.

if it shifts without pressing the brake then you probably have a damaged shift interlock solenoid

Customer: replied 5 months ago.
the one that goes on the floor in the center console?
Expert:  AZTechBrian replied 5 months ago.

correct. If you are able to take it out of park without pressing the brake pedal then I would suspect the shift interlock. Was that the issue you are having?

Expert:  AZTechBrian replied 5 months ago.

and, yes.. it would be located at the floor shifter.

Customer: replied 5 months ago.
already replaced it with an oem part still does the same
Expert:  AZTechBrian replied 5 months ago.

Before you replaced it, did you check to see if the problem was that it was getting energized even with the brake pedal not depressed?

Customer: replied 5 months ago.
i did and it wasnt
Expert:  AZTechBrian replied 5 months ago.

If that's the case, and the shift interlock isn't damaged or getting energized when it shouldn't be, then something is damaged in the shifter assembly.

Customer: replied 5 months ago.
but why would the key not want to come out
Customer: replied 5 months ago.
why wouldnt it start
Expert:  AZTechBrian replied 5 months ago.

I suspect what is happening is that your gear selector isn't going fully into the park position. either something is damaged in the linkage or something needs to be adjusted. That would also cause the gear selector to move without the brake pedal depressed. because it was never fully in park to begin with taking the interlock out of the equation.

Expert:  AZTechBrian replied 5 months ago.

If it's not fully in park, it will not start thanks to the NSS, it also will not allow you to remove the key and will also not allow the interlock to lock the selector.

Customer: replied 5 months ago.
ok so i should take apart the assembly and see what i find there
Expert:  AZTechBrian replied 5 months ago.

I would first make sure that there isn't something out of adjustment in the linkage. That is most suspect in my mind right now.

Expert:  AZTechBrian replied 5 months ago.

out of adjustment or damaged somewhere in the linkage.

Expert:  AZTechBrian replied 5 months ago.

hold on man.... let me check something

Customer: replied 5 months ago.
the linkage underneath the car?
Expert:  AZTechBrian replied 5 months ago.

either under the car or at the gear selector in the car. Check this TSB too.

TECHNICAL SERVICE BULLETIN

Customer: replied 5 months ago.
i have the boot off so that cant be it
Expert:  AZTechBrian replied 5 months ago.

alright. just thought I would throw that out there. Your not getting fully into park, whether it's an issue in the linkage or an issue in the shifter assembly. check over the linkage good and try adjusting it. if that isn't the problem then it's in the shifter.

Customer: replied 5 months ago.
even if the indicator on the cluster is underlined park?
Expert:  AZTechBrian replied 5 months ago.

yes. it could still not be fully in park. hold on, i'll get you the procedure for adjusting it

Expert:  AZTechBrian replied 5 months ago.
Customer: replied 5 months ago.
alright let me print this and see what happens, i should have someone up in the air correct'
Expert:  AZTechBrian replied 5 months ago.

you should be able to do this alone.

Customer: replied 5 months ago.
alright give me a sec lets see what happens
Customer: replied 5 months ago.
still nothing, can the neutrual switch come in the play as well
Expert:  AZTechBrian replied 5 months ago.

it could prevent it from starting, yes but all the symptoms your describing point to it not going into park. Did you say that you replaced the shift cable earlier in the conversation?

Customer: replied 5 months ago.
yeah i replaced it
Expert:  AZTechBrian replied 5 months ago.

was this a problem before it was replaced?

Customer: replied 5 months ago.
it started when the little plastic piece where it connects underneath the car broke
Expert:  AZTechBrian replied 5 months ago.

Ok. That totally reinforces the idea that the issue is that it's not going totally into park and the problem being with the linkage and not the shifter assembly. Look over everything well. Try adjusting it again. Disconnect the cable, put it into park and see if the key goes in, out, engine starts, etc. There is something going on with the shift cable.

Customer: replied 5 months ago.
alright let me check again
Customer: replied 5 months ago.
still nothing manim thinking it might be the neutrual swtich
Customer: replied 5 months ago.
thats what changes the gears and thats where the bot***** *****nk connects too
Expert:  AZTechBrian replied 5 months ago.

if you disconnect the cable, does it work normally then?

Customer: replied 5 months ago.
it does the same
Expert:  AZTechBrian replied 5 months ago.

with the linkage disconnected, it's exactly the same? what i believe happened when the plastic item you spoke of broke, was the gear selector was freed up and allowed to move fully into park. Tension was released from the cable. Maybe I am confused as to what's going on?

Customer: replied 5 months ago.
yeah with the linkage disconnected from underneath the car where it connects on the neutral switch it does the same
Expert:  AZTechBrian replied 5 months ago.

when you disconnected the linkage, you did re'put the selector into park, correct? made sure it was fully engaged in park?

Customer: replied 5 months ago.
yeah it was fully in park
Expert:  AZTechBrian replied 5 months ago.

and still exhibited all the same symptoms as before?

Customer: replied 5 months ago.
yeah and now it wont even turn on
Expert:  AZTechBrian replied 5 months ago.

that's probably because your transmission isn't in park and your NSS recognizes that.

Customer: replied 5 months ago.
why wouldnt it notice it and nss?
Expert:  AZTechBrian replied 5 months ago.

neutral safety switch will prevent you from starting the car when it's not in park or neutral. It wont however cause the selector lever to move out of park without the brake pedal applied. That's the job of the shift interlock.

Customer: replied 5 months ago.
sso what could be the cause of that
Expert:  AZTechBrian replied 5 months ago.

either the nss is out of adjustment, or the transmission not being in park. If you remove the selector cable, and manually put the transmission in park, and make sure the gear selector is also in the park position, will the truck start?

Expert:  AZTechBrian replied 5 months ago.

not remove it, disconnect it..

Customer: replied 5 months ago.
it wont
Expert:  AZTechBrian replied 5 months ago.

ok. I am going to open this up to the other techs. hopefully one of them will know what's up. sit tight..

Customer: replied 5 months ago.
thanks
Customer: replied 5 months ago.
anyone else give you ideas