I believe that this style of faucet is tightened from the top. The faucet will be held on to the monoblock with a grub screw somewhere on the tap (probably requires a small hex key to loosen).

The faucet should then lift away revealing the fixing that you loosen to remove the c-clamp below.

Edit: Following your edit to add the picture from above, looks like my initial suspicion was wrong. Does it have a pull out nozzle?

Answer from scotty3785 on Stack Exchange
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Hunker
hunker.com › 12002051 › how-do-i-remove-a-grohe-kitchen-faucet
How Do I Remove A Grohe Kitchen Faucet? - Hunker
December 12, 2021 - As with all types of faucets, you remove a Grohe faucet by removing the nuts holding it to the countertop. When a faucet has been in place for long enough, the nuts securing it to the countertop are almost certain to be stuck, and getting them ...
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Answer The Home
answerthehome.com › how-to-remove-grohe-kitchen-faucet
How To Remove Grohe Kitchen Faucet With Single Handle Or Double Handles
September 1, 2025 - A step-by-step DIY guide on how to remove Grohe kitchen faucet: Safely remove your sink faucet with one handle or two handles with a sprayer easily and safely.
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How do you disassemble a Grohe tap?
Disassembling a Grohe tap is easy plumbing work if you approach it strategically. Firstly, you have to stop and disconnect hot and cold water lines after switching off the utility supply. Then you have to unbolt the mounts. And finally, Take the tap out and disassemble.
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answerthehome.com
answerthehome.com › how-to-remove-grohe-kitchen-faucet
How To Remove Grohe Kitchen Faucet With Single Handle Or Double ...
How to remove a Grohe faucet head?
You can remove the Grohe faucet head by tightly gripping it with one hand and untwisting the cap on the mouth. Then pull the spray head to detach it from the faucet. If you require changing your whole Grohe faucet, follow our step-by-step instructions.
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answerthehome.com
answerthehome.com › how-to-remove-grohe-kitchen-faucet
How To Remove Grohe Kitchen Faucet With Single Handle Or Double ...
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Reddit
reddit.com › r/askaplumber › how do i remove this stupid grohe kitchen faucet nut?
r/askaplumber on Reddit: How do I remove this stupid Grohe kitchen faucet nut?
September 12, 2020 - Wrench then hand unscrew...bottom shit falls off when faucet pulls up and out!! More replies ... Since you got many helpful answers, I just want to say take off and nuke it from orbit, its the only way to be sure.
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Mr. Kitchen Faucets
mrkitchenfaucets.com › how-to-take-apart-a-grohe-bathroom-faucet
How To Take Apart A Grohe Bathroom Faucet | Mr. Kitchen Faucets
March 31, 2023 - Get the part number for your faucet model, then go to the Grohe website to find the specific replacement cartridge. You can purchase it directly from Grohe or another trusted retailer (such as Amazon). Reach out to their customer service with additional questions. Local hardware stores will typically have these parts either in stock or available by order. Whether you have a single or double-handle faucet, the process for Grohe bathroom faucet handle removal is the same.
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Grohe
grohe.ca › bathroom-faucet-fittings-and-spare-parts › disassembling-key › grohe-chrome-48021000
Disassembling Key
Disassembling Key
Find your perfect product using our Selector Tool
Price   $7.50
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Tumblr
ryanlangdraws.tumblr.com › post › 692624796090040320 › how-to-remove-grohe-kitchen-faucet
Ryan Langdraws : How to Remove Grohe Kitchen Faucet?
August 15, 2022 - Remove any extra screws that may be holding down your old kitchen faucet. Once you’ve removed all of them, pull out the old faucet and set it aside. Take a look at your new Grohe kitchen faucet and decide which way it will fit in relation to where the pipes run in your kitchen.
Find elsewhere
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Houzz
houzz.com › discussions › 2505549 › help-me-remove-old-grohe-kitchen-faucet
Help me remove old Grohe kitchen faucet?
The rigid metal lines are still connected to the bottom of the faucet and I am using them to torque the assembly out from inside the nut (yes, it is moving, not stuck anymore) but I just cannot get hold of the nut well enough to get it off the rest of the way. It is a weird shape and the sink in my way is not helping. Any ideas, or does it just take some tool my plumber will have but I don't? I don't know how well you can see what I am working with from the faucet diagram, but I'll link it below.
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JustAnswer
justanswer.com › plumbing › kovdi-trying-remove-grohe-kitchen-faucet-having.html
Expert Tips: How to Remove a Grohe Kitchen Faucet Without a Basin Wrench
The part above the nut should not be spinning, so I do not believe that is the issue. The nut you have indicated will indeed unscrew but may require some force. The problem with the basin wrench you are using is that it squeezes when in use, which can make it a bit more challenging to remove the nut. Can you get a crescent wrench under the sink and use that? ... No, it's extremely tight in there; there's no space for that. ... I am trying to remove a ladylux grohe kitchen faucet...
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Quora
quora.com › How-do-I-remove-an-old-Grohe-kitchen-faucet
How do I remove an old Grohe kitchen faucet?
Answer: Same way you remove any other kitchen faucet buddy. Is it a Hans grohe or just a regular grohe, yeah I was shocked to find out that there are actually two different grohe brands. There from the same family they were brothers one did better than the other and one it has a better product bu...
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Pinterest
pinterest.com › explore › home decor
How to remove a Grohe kitchen faucet
July 11, 2022 - How to remove a Grohe kitchen faucet · Bryan · Explore · Home Decor · Kitchen sink plumbing · 42 Pins · 2y · Faucet Installation Guide · Diy Faucet Installation Guide · Faucet Repair Parts Diagram · Faucet Technical Diagram · Grohe Kitchen Faucet ·
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Plbg.com
plbg.com › forum › read.php
How to remove a Grohe faucet?
Ask your do it yourself plumbing questions and get free answers as well as DIY information about faucets, toilets, pumps and water filters from plumbers at Plbg.com
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Quora
quora.com › How-do-I-take-apart-a-grohe-bathroom-faucet
How do I take apart a grohe bathroom faucet?
You only need a couple of screwdrivers. If you only need to replace the cartridge (they don’t have washers), carefully temove the little cap on the handle, unscrew handle and you will see the cartridge.
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JustAnswer
justanswer.com › plumbing › cnc0h-i-m-trying-figure-remove-grohe-kitchen.html
Expert Tips on Removing Grohe Kitchen Faucets | JustAnswer Plumbing
I would appreciate it if you could leave me a five-star rating and check out the video below. ... Disclaimer: The customer and expert messages presented herein may have been altered or modified to enhance readability and safeguard the privacy of individuals. These modifications do not change the intent or substance of the original messages. ... Grohe faucets often have hard-to-reach mounting nuts and unusual fastener designs complicating removal. Grohe kitchen faucets may use a unique U-shaped mounting nut that resists standard basin wrenches.
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DoItYourself.com
doityourself.com › doityourself.com community forums › plumbing, piping, water heating, wells, air & water filtration and conditioning › plumbing and piping › my grohe ladylux faucet leaks... and i can't remove the lever
My Grohe Ladylux faucet leaks... and I can't remove the lever - DoItYourself.com Community Forums
May 3, 2013 - My Grohe Ladylux faucet leaks... and I can't remove the lever · I have found the maintenance instructions and I have removed the fixing screw with the hex wrench. Unfortunately I cannot pull off the lever. I have tried to pry it off - but I can see that I am bending the cap and I fear that I will break it. Does anyone have any ideas? Regards Ken ... Is this one of the sidearm faucets ? If you go to page 3.......expand the pic real big.....there is more than one screw holding the system together http://www.faucetdirect.com/mediabas...es33755ins.pdf
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Reddit
reddit.com › r/plumbing › how does one get a grohe faucet handle to come off - won’t budge even after set screw removal.
r/Plumbing on Reddit: How does one get a Grohe faucet handle to come off - won’t budge even after set screw removal.
April 18, 2020 - Take the little circle that indicates which side is hot and which is cold off , there should be a hex socket there (it's small , I warned you). Umscrew , take the handle off. If the advice didn't work it means not all grohe are the same.
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Terry Love
terrylove.com › home › forums
Grohe, Request help removing old kitchen sink faucet
Terry Love Plumbing Advice, Remodel DIY & Professional Forum. The best plumbing forums in the USA and Canada. A place for home owners to ask questions and for professionals to share information.
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Hunker
hunker.com › 13417711 › how-to-remove-handles-from-grohe-sink-faucets
How To Remove Handles From Grohe Sink Faucets - Hunker
March 26, 2022 - You might also have some luck by ... handle that is mounted sideways to the faucet body, and you remove this the same way — by pulling....