1999 GMC Yukon Start

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Craig3708

Copper - Posts: 155

Joined: January 30, 2004

Location: Canada

Posted: December 21, 2005 at 3:38 PM / IP Logged

You said that the remote start was installed by someone else. I think they cheated and bypassed the passlock the cheap way. If the truck was started with the key and then the passlock wire was cut then the security would have been bypassed. The truck would know that the passlock issue happened after the truck was running and would not allow the passlock to stop the truck from starting. The only thing that would be changed is the security light would be on. (if the blub hasen't been removed). If you reconnected this passlock wire and the truck won't start, I would assume that you have a cut key instead of the original. If this is the cause (since the passlock wire has been reconnected) you will have to use the original Coded (resistance) key.

scarf12

Member - Posts: 25

Joined: September 05, 2004

Location: Canada

Posted: December 21, 2005 at 3:56 PM / IP Logged

hmm maybe that was the way because when i opened it up the ORANGE / black wire was the only wire cut

however... the key is not a cut key and is the original key...

maybe it is working however i am in tamper mode and simply cannot get out of it? thats my guess because i have rechecked everything.

right now i just reconnected the BLACK/ orange and the yellows back to FACTORY and am letting the key sit inside on RUN for alittle bit... hopeing it will do SOMETHING

anyone have any more ideas?

scarf12

Member - Posts: 25

Joined: September 05, 2004

Location: Canada

Posted: December 21, 2005 at 4:52 PM / IP Logged

did nothing

im so frustrated right now, have never run into this problem EVER

this is the 2nd day of the truck not starting because of this damn passlock and I dont understand why it just dosnt want to reset

chriswallace187

Gold - Posts: 1,661

Joined: March 11, 2002

Location: Pennsylvania, United States

Posted: December 21, 2005 at 4:57 PM / IP Logged

This might be stupid, but are you sure the passlock is the problem? If the security light isn't on or flashing, it may be another problem with the truck not getting fuel or something.

Also, if you haven't done so already I would follow the passlock wires all the way from the key cylinder to anywhere they may have been used for the remote start...the passlock connector has the ORANGE / black, RED / white, and yellow wires, and is a 3-pin connector that goes directly into the key cylinder.

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scarf12

Member - Posts: 25

Joined: September 05, 2004

Location: Canada

Posted: December 21, 2005 at 8:11 PM / IP Logged

it has to be because it was working...

Iv followed the passlock wires as much as possible and I cannot see anything at all.

Any other ideas? im at a total loss at this point

is there some kind of fuse or anything thats hidden for the passlock? or ANYTHING..... im really dumbfounded from this right now and really just want this to start at this point

Craig3708

Copper - Posts: 155

Joined: January 30, 2004

Location: Canada

Posted: December 21, 2005 at 9:25 PM / IP Logged

When you turn the key to the on position, do you here the fuel pump running??? If you do, while cranking the engine check for spark. You menitioned that you had blown a fuse, was this a ignition fuse??? Check these things out and post a reply......

scarf12

Member - Posts: 25

Joined: September 05, 2004

Location: Canada

Posted: December 21, 2005 at 10:18 PM / IP Logged

yup again the engine starts and then quickly dies... u can tell the engine is getting fuel and then bam it cuts it..

Craig3708

Copper - Posts: 155

Joined: January 30, 2004

Location: Canada

Posted: December 22, 2005 at 8:22 AM / IP Logged

Then this is a passlock problem, aii I can suggest now is measuring the resistance with the key in the on position, and match it with either resistors or a dip switch unit. This will try and permently bypass the passlock while hooked in line.

Craig

Craig3708

Copper - Posts: 155

Joined: January 30, 2004

Location: Canada

Posted: December 22, 2005 at 8:51 AM / IP Logged

Also check around the steering colmun for a second key. These systems will not read two keys at same time. It will start and stop. Go and get a cut key instead of the original and try it. Please post your results.

Craig

chris354

Silver - Posts: 253

Joined: February 19, 2005

Location: United States

Posted: December 23, 2005 at 1:24 AM / IP Logged

The passlock system does not need a special key the r code is generated by the key cylinder so just getting a new key does no good. Does this yucon have the square info box in the cluster if so what does it say when trying to start. If its not saying security I would say its not a problem with the passlock system. if it is and you have all the passlock wires back together it could be the key cylinder is bad they have quite a bit of problems with those key cylinders. Also somthing else to check is to make sure you removed any pieces to the other alarm and reconected any cut wires so if it had any type of imobilizer with the other system its took off.

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