VXOC Astra-J/GTC

Hi folks, new to the forum. I have an Astra GTC SRI 1.4 with an engine warning light issue. 
My garage told me that after consulting their Technical Information Supplier with the fault codes, that it needed an ECU update in response to Technical Service Bulletin 3141. 
I've just taken it into Vauxhall Wakefield and their service team have done 'an' update, but have never heard of Technical Service Bulletin 3141, so won't confirm whether or not it has fixed the warning light issue. 

Does anyone have access to this bulletin please, so that I can figure out whether it's my garage or Vauxhall Wakefield that's not doing their job right. 

Very many thanks in advance. 

Tony

I have access to them but very rarely pay to log into that section of GM but when I do I'll let post back here.

The issue I have with these "updates" is they mostly mask the problem/s if the car's been running fine then all of a sudden these issues occur to me its not software related as the issue would of been there since day one.

It just the quick way for garages to make money these days.

Thank you very much for the quick reply, Rusty. Much appreciated. I've only had the GTC (2014 model) for two months and already up over £2K in repairs. The standard Astra I had before this never cost a penny in repairs, and this one is three years younger. Very frustrating. It's worrying that Vauxhall Wakefield are saying that they don't know about this bulletin. It seems they're just concocting a set of words to be able to say they can charge me without fixing the problem.. I certainly agree with your final comment..