2006 GM Envoy suspect anti theft problem.

We bought this car for my wife last October. It was fine for about 6 months and then one day my wife said that it wouldn't start. I came home later that day and tried to start it and it started right up. We subsequently took it on vacation and put all kinds of miles on it and it was fine. Then two weeks ago it did it again. This time I had made some en quires on this problem beforehand and we've noticed the blinking padlock symbol flashing on the dash. Since that time it's happened a few more times. Every time it's failed to start there is the padlock blinking. We've had to perform the relearn procedure a number of times since then but with the increasing frequency this is now happening, (twice this week), it looks like the hand writing is on the wall and I fear that the next time will be the tow truck.

So, first I would appreciate help in determining which Passlock, passkey, VATS, (or whatever the damned thing in my vehicle is called) system we have in this car and then if someone could please direct me to the proper procedure to permanently bypass and rid my life if this useless nuisance I would be very grateful. There are so many different procedures and so many different systems out there. I just want to be sure I'm definitely going into this with my eyes open. For example some of these procedures mention cutting a yellow wire. Yellow wires scare me because aren't those for the air bag circuits? I've really looked at the key and aside from the fact that there is definitely no resistor chip in it and I don't know about a transponder I've hit a wall with this. Thanks for any and all help. Lenny

wrote in
:

> We bought this car for my wife last October. It was fine for about 6
> months and then one day my wife said that it wouldn't start. I came
> home later that day and tried to start it and it started right up. We
> subsequently took it on vacation and put all kinds of miles on it and
> it was fine. Then two weeks ago it did it again. This time I had made
> some en quires on this problem beforehand and we've noticed the
> blinking padlock symbol flashing on the dash. Since that time it's
> happened a few more times. Every time it's failed to start there is
> the padlock blinking. We've had to perform the relearn procedure a
> number of times since then but with the increasing frequency this is
> now happening, (twice this week), it looks like the hand writing is on
> the wall and I fear that the next time will be the tow truck.
>
> So, first I would appreciate help in determining which Passlock,
> passkey, VATS, (or whatever the damned thing in my vehicle is called)
> system we have in this car and then if someone could please direct me
> to the proper procedure to permanently bypass and rid my life if this
> useless nuisance I would be very grateful. There are so many different
> procedures and so many different systems out there. I just want to be
> sure I'm definitely going into this with my eyes open. For example
> some of these procedures mention cutting a yellow wire. Yellow wires
> scare me because aren't those for the air bag circuits? I've really
> looked at the key and aside from the fact that there is definitely no
> resistor chip in it and I don't know about a transponder I've hit a
> wall with this. Thanks for any and all help. Lenny
>

pretty sure you have a chip or transponder in your key and one of them
is failing. replace that key and most likely your problems will be gone.
KB pretty common problem

The deler says this is Passlock 2 and that the key is nothing special, available at most hardware stores. Lenny

wrote:
> We bought this car for my wife last October. It was fine for about 6
> months and then one day my wife said that it wouldn't start. I came
> home later that day and tried to start it and it started right up. We
> subsequently took it on vacation and put all kinds of miles on it and
> it was fine. Then two weeks ago it did it again. This time I had made
> some en quires on this problem beforehand and we've noticed the
> blinking padlock symbol flashing on the dash. Since that time it's
> happened a few more times. Every time it's failed to start there is
> the padlock blinking. We've had to perform the relearn procedure a
> number of times since then but with the increasing frequency this is
> now happening, (twice this week), it looks like the hand writing is
> on the wall and I fear that the next time will be the tow truck.
>
> So, first I would appreciate help in determining which Passlock,
> passkey, VATS, (or whatever the damned thing in my vehicle is called)
> system we have in this car and then if someone could please direct me
> to the proper procedure to permanently bypass and rid my life if this
> useless nuisance I would be very grateful. There are so many
> different procedures and so many different systems out there. I just
> want to be sure I'm definitely going into this with my eyes open. For
> example some of these procedures mention cutting a yellow wire.
> Yellow wires scare me because aren't those for the air bag circuits?
> I've really looked at the key and aside from the fact that there is
> definitely no resistor chip in it and I don't know about a
> transponder I've hit a wall with this. Thanks for any and all help.
> Lenny

Should be Passlock 2. No chip/transponder in the key. The electronics
are in the key cylinder. They have a bad habit of the wires breaking and
the signal fails. Not hard to deal with but it won't fix itself.

--
Steve W.

On Tuesday, August 11, 2015 at 9:35:48 PM UTC-4, wrote:
> We bought this car for my wife last October. It was fine for about 6 months and then one day my wife said that it wouldn't start. I came home later that day and tried to start it and it started right up. We subsequently took it on vacation and put all kinds of miles on it and it was fine. Then two weeks ago it did it again. This time I had made some en quires on this problem beforehand and we've noticed the blinking padlock symbol flashing on the dash. Since that time it's happened a few more times. Every time it's failed to start there is the padlock blinking. We've had to perform the relearn procedure a number of times since then but with the increasing frequency this is now happening, (twice this week), it looks like the hand writing is on the wall and I fear that the next time will be the tow truck.
>
> So, first I would appreciate help in determining which Passlock, passkey, VATS, (or whatever the damned thing in my vehicle is called) system we have in this car and then if someone could please direct me to the proper procedure to permanently bypass and rid my life if this useless nuisance I would be very grateful. There are so many different procedures and so many different systems out there. I just want to be sure I'm definitely going into this with my eyes open. For example some of these procedures mention cutting a yellow wire. Yellow wires scare me because aren't those for the air bag circuits? I've really looked at the key and aside from the fact that there is definitely no resistor chip in it and I don't know about a transponder I've hit a wall with this. Thanks for any and all help. Lenny

HWhen you say "electronics" I was under the inpression that it was simplty a resistance that was

On Tuesday, August 11, 2015 at 9:35:48 PM UTC-4, wrote:
> We bought this car for my wife last October. It was fine for about 6 months and then one day my wife said that it wouldn't start. I came home later that day and tried to start it and it started right up. We subsequently took it on vacation and put all kinds of miles on it and it was fine. Then two weeks ago it did it again. This time I had made some en quires on this problem beforehand and we've noticed the blinking padlock symbol flashing on the dash. Since that time it's happened a few more times. Every time it's failed to start there is the padlock blinking. We've had to perform the relearn procedure a number of times since then but with the increasing frequency this is now happening, (twice this week), it looks like the hand writing is on the wall and I fear that the next time will be the tow truck.
>
> So, first I would appreciate help in determining which Passlock, passkey, VATS, (or whatever the damned thing in my vehicle is called) system we have in this car and then if someone could please direct me to the proper procedure to permanently bypass and rid my life if this useless nuisance I would be very grateful. There are so many different procedures and so many different systems out there. I just want to be sure I'm definitely going into this with my eyes open. For example some of these procedures mention cutting a yellow wire. Yellow wires scare me because aren't those for the air bag circuits? I've really looked at the key and aside from the fact that there is definitely no resistor chip in it and I don't know about a transponder I've hit a wall with this. Thanks for any and all help. Lenny

Hi Steve
This is what I've learned so far. The dealer says this is a version 2
system, so the key is nothing special. It can be made at any hardware
store. That suggests that it is the cylinder (or whatever rotates with
it) that puts out the resistance when the key is inserted and turned
that the anti theft module wants to see. Apparently while it could be
the key, it is more likely this flaky and troublesome resistance unit
cylinder that the computer wants to see during the initial handshake
period. What I've been told is that this hand shake intermittently
gets screwed up because the correct resistance is not always seen by
the CPU. Subsequently the car "thinks" it's being stolen, goes into
protect mode and you spend the next ten minutes with your thumb up
your ass hoping the damn thing will relearn the key. I could be way
off base here but from what I've seen, if I can substitute the correct
resistance, (and more than one video I've looked at shows how to do
this), then I can eliminate the cylinder resistance from the starting
prerequisites. We have now found the spare key and we're going to
start using that one instead of the first, to see if the frequency of
this problem changes as well. So depending on that outcome I think
we're going to attempt the bypass and see what happens. As far as
the "electronics" you mentioned in the cylinder Steve I was under the impression that it was simply a unit that provides a resistance that the anti theft module sees during that initial handshake period. Is it more than that? Thanks for looking into this for me. Lenny