I am a 1976 Blazer owner from the Netherlands.
Could someone tell meif it is possible to replace the coolingfan beltdriffen, by a electrical one?

 

Welcome to the forum.

I am not familiar with that year Blazer but I would suspect such a swap of parts would be possible. It is not an uncommon thing for people to do here in the US.

 

Welcome to the forum!
FYI, on Blazerforum.com it's generally best to ask technical questions in that section of the forum. You'll usually get a better chance of a good response.

It is possible to swap from the mechanical clutch fan to an electric fan. Regarding your specific truck year I'm not sure whether there's kits available, nor what will be available in Europe. In North America its pretty common to modify and swap using a fan from another vehicle. I did it using a fan from a Chrysler Intrepid, which is a dual two speed fan setup. I've also seen people use electric fans from other GM vehicles such as from a Camaro. It just depends on which fan is available and then fabricating a way to adapt it to your vehicle. You'll want to find something that is a similar size to the radiator face, and is built for cooling an engine of similar size.

 

Welcome to the Blazer Forum.

From this side of the Atlantic as well.

You may want to do a search in either the "Builds" or the Lighting & Electrical.
Yes, it is possible but involves a bit of planning and fabrication skills.

Best advice is from El_Beautor, there have been several builds and descriptions already.