Engine cranks and dies immediately?????

[Ronnie White]

I have read a few posts that talk about a 1999 GMC Suburban that starts and dies immediately. This problem is come and go. It seems to be worse if it sits for a while. After trying to start sometimes it dies a few times and starts and runs fine and sometimes you have to come back in a few hours and it starts right up. Most times it starts with no problems. A mechanic shop told me today it is the passlock sensor and wants over $800 to fix. I have never heard of this problem before now. Any ideas or fixes that some of the others on here have had?

[Ronnie White]

If it is the passlock how do you reprogram after installing a new one or what should a reasonable price be for having a new one installed

[michelq]

I would replace lock cyl to start with

[Ronnie White]

Does the new lock cylinder require reprograming of the passlock? How would I find the process of reprograming. The manual I have does not even mention passlock and information has been hard to come by.

[michelq]

does not nead programing