Undercover Uc1138l G1k Elite Lx Tonneau Cover Fits 15 18 Sierra 1500 Fits select: 2015-2018 GMC SIERRA
Undercover Uc1138l G1k Elite Lx Tonneau Cover Fits 15 18 Sierra 1500 Fits select: 2015-2018 GMC SIERRA
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UNDERCOVER

Undercover Uc1138l G1k Elite Lx Tonneau Cover Fits 15 18 Sierra 1500 Fits select: 2015-2018 GMC SIERRA

4.6 stars out of 243 reviews
(4.6)|
243 ratings
Undercover Uc1138l G1k Elite Lx Tonneau Cover Fits 15 18 Sierra 1500 Fits select: 2015-2018 GMC SIERRAUndercover Uc1138l G1k Elite Lx Tonneau Cover Fits 15 18 Sierra 1500 Fits select 2015 2018 GMC SIERRA
Actual Color:Deep Ocean Blue-Out of stock
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Key item features

  • The Elite LX is the newest cover from UnderCover. It comes standard with all the features from the UnderCover Elite. Weve added a premium carpet lined underside, topped with flawless paint to match to make the LX the sharpest tonneau on the market. Engineered to provide a precise fit and finish to your truck bed.
  • EX 15-18/19 Limited Sierra 5.9ft


Fits Select:
2015-2018 GMC SIERRA
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Current price is $1,498.99
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Out of stock

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Customer ratings & reviews

4.6 out of 5 stars
stars243 ratings243 reviews
How item rating is calculated
  1. 5 stars77% (188)
  2. 4 stars13% (31)
  3. 3 stars4% (9)
  4. 2 stars0% (1)
  5. 1 star6% (14)

Reviews summary

Pros

  • : Has a perfect color match with trucks.
  • : Accurately matches vehicle's paint job color.
  • : Cover fits snugly around truck bed edges.
  • : Quick process with minimal effort.
  • : Made with high-end components that are durable.

Neutral

  • : Can be clear and concise, but sometimes incomplete or confusing.
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Showing 1-3 of 243 reviews

Sep 17, 2025
Katherine C.
5 out of 5 stars review

Seller Verified Purchase

Product is beautiful

Everything matched well. No instructions came with the tonneau top at all. We used youtube videos to help. As for customer service of this company: it was horrible. Ordered on July24th. Got it September 4th. We had to drive 115 miles to get it. Everytime I called they gave me different dates. I would not buy from them again. The product itself was good quality is about the only positive I can say.

Review from realtruck.com
Helpful?30B6M1J1D82O842382005
Oct 14, 2024
Kenneth A.
5 out of 5 stars review

Seller Verified Purchase

UnderCover tonneau

Purchased the color matched Undercover Elite LX tonneau cover and I'm very pleased. The color match is spot on, and the fit and finish are excellent. The inside is finished with material that matches the BedRug I installed and matched perfectly. Installation is simple and fast, measure for the four brackets, tighten down 8 bolts, snap on the pistons, then adjust the latches for the locks. Very easy and takes around 30 minutes. I think it's a little on the high side for price, but that's how I feel about EVERYTHING today. Even with the price, would I buy it again - yes!! I previously owned another major brand tonneau on my last truck and this UnderCover tonneau blows that brand away.

Review from realtruck.com
Helpful?30B6M1J1D82O842382005
Jun 25, 2025
Douglas R.
5 out of 5 stars review

Seller Verified Purchase

Still Waiting To Receive My Item

I ordered the item on 6/9/25 and it still has not shipped so I can't rate it.

Review from realtruck.com
Helpful?30B6M1J1D82O842382005