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2021Trailblazer RS AWD Scarlet Red Metallic
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I doubt they require drilling, but I've also been looking at them wondering if they help. They do appear to be low profile which is nice.

Steve
 

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2021 LT AWD
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Not sure what is all involved. From the Chevrolet TB accessories page there are two versions. RS P/N 42766803 and everything else?? P/N 42766802. There is a difference in dimensions. I wonder why they would be different. It looks like they used the same picture for both versions. Also from the FAQ's
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Seminolejon,
They look like they fit well. You state no drilling. are there fasteners that need to be removed and then put back in to secure the mud flaps?
Included with the mudflaps are bolts and a mini wrench. The bolt thread was a little thicker than the existing screws so I just reused the existing screws. The holes lineup exactly. If you get them don't forget the bottom screws on the rear flaps.
 

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Included with the mudflaps are bolts and a mini wrench. The bolt thread was a little thicker than the existing screws so I just reused the existing screws. The holes lineup exactly. If you get them don't forget the bottom screws on the rear flaps.
Thanks for the post and pic. Was looking at the OEM Chevy version ...but are $100. Might just go for these. Was happy with the after market console and door inserts so may push my luck with these. The console arm rest cover was OK
but not 100% happy with the fit.
 

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2021Trailblazer RS AWD Scarlet Red Metallic
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Installed the GM splash guards today and I did it without instructions, lol. It took me a few minutes to figure everything out, but the installation wasn't very hard. The kit does come with 3/16" rivets, so you will need a rivet tool. I used Astro Pneumatic part number 1422 which worked great. It would be possible to use screws where the rivets go, but the rivets do look nice and secure the flaps pretty good. You also need to drill some 1/8" holes into the plastic wheel wells and 3/16" holes for the rivets that attach to the plastic trim under the front fender. I'm happy with how it turned and they do fit perfect. I used GM part number 42776252 on my AWD RS. I'll get some pictures posted as soon as I get her all cleaned up.
 

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Installed the GM splash guards today and I did it without instructions, lol. It took me a few minutes to figure everything out, but the installation wasn't very hard. The kit does come with 3/16" rivets, so you will need a rivet tool. I used Astro Pneumatic part number 1422 which worked great. It would be possible to use screws where the rivets go, but the rivets do look nice and secure the flaps pretty good. You also need to drill some 1/8" holes into the plastic wheel wells and 3/16" holes for the rivets that attach to the plastic trim under the front fender. I'm happy with how it turned and they do fit perfect. I used GM part number 42776252 on my AWD RS. I'll get some pictures posted as soon as I get her all cleaned up.
Wow I am surprised you would have to drill anything. I ordered the GM ones for LT. Hope there is no drilling involved.
 

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2021Trailblazer RS AWD Scarlet Red Metallic
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There are 10 holes that need to be drilled. 6 for the front and 4 for the rear. 4 of those holes are for the rivets. The kit comes with 16 screws, 14 clip nuts and 4 rivets.
 

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2021Trailblazer RS AWD Scarlet Red Metallic
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I purchased the GM ones as I like the way they look better. I did a series of videos on the install. Super easy. The videos probably aren’t in order and yes I suck at videos. Hopefully this might help someone install them.

Sometimes videos are more helpful than the supplied instructions. I installed the GM mud guards without instruction which was more time consuming than it needed to be, but they ended up looking and fitting great. Thanks for sharing your videos!
 
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Sometimes videos are more helpful than the supplied instructions. I installed the GM mud guards without instruction which was more time consuming than it needed to be, but they ended up looking and fitting great. Thanks for sharing your videos!
thank you, if I was good at editing I would make it one video. It’s all out of order too lol. Hopefully I help at least one person, then it was worth it!
 
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