Having the same issues locating the fuel filter on the European 2011 Chevrolet Spark 1.0 LS 68HK. Followed the fuel lines, but can't seem to locate it.
Judging by the part number it looks to be an inline filter. Not even the authorized Chevy mechanic knew where it was and there's no information searching the web. Might be in the fuel tank, but for me it remains a mystery...