Still Cutting Out

[quintology]

I have a 98 6.5l tur/diesel Suburban.

I recently posted the below:

"A couple of weeks ago the 'Service throttle soon' light came on whilst driving and the cruise stopped working at the same moment as the light came on. The car accelerated roughly until I stopped and restarted the car and the light went out. Once i restarted the car went fine as if nothing had happened - no light on - all working o.k.

Then last night for no apparant reason, after the car started fine i begun driving the car and it cut out and stalled after 30sec, Stop put tranny in park, restart no prob, 30 sec later cut out again. repeated this exercise every 30 sec for 20 mins or so until I finally got home... Today I get in the car and it is if nothing had happened. All fine..

I understand that my model of car has electronic throttle control, is this causing the problem and if so what would be the cost of replacement. Has anyone else had this strange intermittant problem.

BTW no warning lights displayed after stalling to indicate an engine problem..

Thx

Aussie Suburban Owner."

Can anyone please help as it is driving me nuts!!! and since I am in Australia, not too many mechanics know of this car as only a few suburbans were imported to Australia.