Tech 2 Purchase

[George B]

the ANC mic's basically create a artificial filter and lower the output, when I added a sub to mine I was getting a lot of feedback hum. I discovered this was because of the anc mic's, so I disconnected them and not only did it eliminate the hum but it sounded better to me overall.
the active noise cancellation is designed to drown out any exterior noise so you do not hear it, this is done by creating a opposing sound thereby "canceling it out"
so if there is a sssshhh sound around you it creates hhhssss sound.
maybe if you normally listen at low volume this may sound fine but I usually have the radio jamming and there is a noticeable gain in the output with the mics offline.

I didn’t know they had that.

 

[Doubeleive]

I didn’t know they had that.

it's only on certain bose equipped models I am not sure what year they started doing it, my Silverado has bose but no ANC
if you have it on your gmt900 then there is 2 little grills above the drivers head in the headliner, 1 is the environmental sensor the other is 1 of the bose anc mic, the 2nd one is on the passenger side not sure where the 3rd one is. I cut the wires under the center console which can be patched back if need be for resale.

 

[j91z28d1]

I skimmed the first few pages, but didn't see a solid answer. did anyone figure out what the product line is?

 

[swathdiver]

I skimmed the first few pages, but didn't see a solid answer. did anyone figure out what the product line is?

Product line for what?

 

[j91z28d1]

when you first start up the tech 2 it ask for year and model then product line. I Googled and it said 3rd vin but that's not an option and looking at this thread it seems like 3rd vin is never an option. I picked k for my 96 tahoe and y for my 08 c6 but those are just random guesses before I made any real changes, I'd like to know forsure I have the right one?

 

[Fless]

IIRC product line is the 5th VIN digit. K=4x4 C=4x2

 

[j91z28d1]

you think it would be the same for a 2011 yukon as well? I haven't actually hooked it up there yet but it's the one I really picked it up for.

 

[Fless]

Yes

 

[j91z28d1]

thanks

 

[j91z28d1]

the ANC mic's basically create a artificial filter and lower the output, when I added a sub to mine I was getting a lot of feedback hum. I discovered this was because of the anc mic's, so I disconnected them and not only did it eliminate the hum but it sounded better to me overall.
the active noise cancellation is designed to drown out any exterior noise so you do not hear it, this is done by creating a opposing sound thereby "canceling it out"
so if there is a sssshhh sound around you it creates hhhssss sound.
maybe if you normally listen at low volume this may sound fine but I usually have the radio jamming and there is a noticeable gain in the output with the mics offline.

just as an interesting thing, I did pick up a clone tech 2 and under the amp modual there's an option to turn noise canceling on and off. just thought that was interesting.

 

[Doubeleive]

just as an interesting thing, I did pick up a clone tech 2 and under the amp modual there's an option to turn noise canceling on and off. just thought that was interesting.

That may be just for testing purposes only you could try it by turning it off in the menu then back out, cycle the key off/on and go back in and see if it is still turned off

 

[j91z28d1]

ahh might be.. I'll check next time I'm playing with it. I was thinking it was like the afterblow option

 

[Doubeleive]

ahh might be.. I'll check next time I'm playing with it. I was thinking it was like the afterblow option

I can tell you that disabling it does make a difference, I cut the mic wires on mine. it wakes the system up a bit I have a louder muffler on it anyway Bose can't drown that out.

 

[George B]

Well, my second tech2 just bit the dust. I inadvertently started the truck while it was booting up and it flaked out. Wouldn’t connect to the candi and now has a blue screen unless I hold the cord tight to the back. I think I am done with these things. Too bad, I liked having the tool but can’t keep dropping $300 on one every year.

 

[mikez71]

Does it work with the cord held? (I'm assuming you mean pushing it in?) Maybe the CF card took a hit and you need software?
That's a bummer... hoping you can get it fixed so when mine breaks you can tell me how to fix it!

 

[George B]

Does it work with the cord held? (I'm assuming you mean pushing it in?) Maybe the CF card took a hit and you need software?
That's a bummer... hoping you can get it fixed so when mine breaks you can tell me how to fix it!

If I hold the cord it boots but won’t connect to the candi. Maybe just needs a new VCIM but our little friends that are building these don’t help with warranty

 

[George B]

Oh the joy! I want an MDI but they don’t come with software.

 

[George B]

I don’t get it. We drove around for a half hour using it. It worked fine. Came home and when I reconnected it flaked out.

 

[mikez71]

Yikes! Never start car while booting, now we know! Yea what could it possibly have been a low voltage while booting? Makes no sense about the cable..

Might be time for a vxdiag VCX nano.. Good little writeup here, although it looks like a pain to setup.. It sounds like they have it figured out..

Tech2 and SPS2 programing

I am an owner of a Tech2 diagnostic tool and after countless hours of trying to get the unit to serve as a pass through, I began reading and researching why the GM SPS site would not working with the tool. After reading on several sites, including our own, I learned that GM had changed the site...

www.tahoeyukonforum.com

 

[George B]

Yikes! Never start car while booting, now we know! Yea what could it possibly have been a low voltage while booting? Makes no sense about the cable..

Might be time for a vxdiag VCX nano.. Good little writeup here, although it looks like a pain to setup.. It sounds like they have it figured out..

Tech2 and SPS2 programing

I am an owner of a Tech2 diagnostic tool and after countless hours of trying to get the unit to serve as a pass through, I began reading and researching why the GM SPS site would not working with the tool. After reading on several sites, including our own, I learned that GM had changed the site...

www.tahoeyukonforum.com

Yeah, I don’t know what the heck happened. It was just an automatic movement to go to start instead of key on.