The best floor mats for 2018 GMC Sierra trucks are decided by trim as much as by brand. An SLE with a bench seat, an SLT with buckets, and a Denali with its floor console all anchor liners differently. The wrong pairing fights the seat bolts from day one.
We pulled five sets from the live Amazon catalog, each molded for the 2014-2018 Sierra platform that GMC shares with the Silverado. Each was ranked on cab honesty, lip height, and how well it survives farm and jobsite mud.
Below you get the best floor mats for 2018 GMC Sierra ranking first. Then comes the trim-and-cab confirmation that prevents the classic wrong-SKU order, the loyalty story behind certain molds, and the liner that actually contains a winter of slush.
Quick Verdict
Best Overall Crew Cab: Husky Liners Weatherbeater 98231 — the mold Sierra forum regulars keep recommending
Best Value Full Set: Cartist Crew Cab Set — scanner-molded TPE coverage at a value price
Best Waterproof Front-to-Back: TPE Front & Rear Liner Set — full-row waterproof coverage for slush seasons
Best Double Cab Fit: KARPAL Double Cab Set — one of the few SKUs that names the smaller cab plainly
Best Premium Bucket Row: LASFIT 1st-Row Bucket Liners — laser-measured fit for console trucks
Quick Comparison Table
| Product | Award | Key Spec | Check Price |
|---|---|---|---|
| Husky Liners Weatherbeater Floor Mats for 2014-2018 Silverado Sierra Crew Cab, 98231, 3 pc. | Best Overall Crew Cab | Fits 2014-2018 Sierra/Silverado 1500 and 2015-2019 HD Crew Cab, front and 2nd row, raised lips | Check Price on Amazon |
| Cartist Floor Mats for 2014-2018 Chevy Silverado & GMC Sierra 1500 Crew Cab, All Weather TPE | Best Value Full Set | Crew Cab only, 3D-scanned TPE, 2014-2018 1500 span plus 2015-2019 HD, full front and rear | Check Price on Amazon |
| TPE Floor Liner Set for 2014-2018 Silverado/GMC Sierra 1500 Crew Cab, Waterproof Front & Rear Row | Best Waterproof Front-to-Back | 2014-2018 Crew Cab, 2015-2019 HD span, waterproof black TPE, front and rear coverage | Check Price on Amazon |
| KARPAL Floor Mats for 2014-2019 Chevy Silverado/GMC Sierra 1500, Only Double Cab, TPE Custom Fit | Best Double Cab Fit | Double Cab only, 2014-2019 1500 LD, 2015-2019 HD footwell coverage, TPE custom fit | Check Price on Amazon |
| LASFIT Floor Mats for Chevy Silverado/GMC Sierra 1500 2014-2018, Only Crew Cab Bucket Seat, Anti-slip | Best Premium Bucket Row | Crew Cab 1st-row bucket seats, laser-measured templates, anti-slip, with-carpet note | Check Price on Amazon |
The Picks
1. Husky Liners Weatherbeater Floor Mats for 2014-2018 Silverado Sierra Crew Cab, 98231, 3 pc. — Best Overall Crew Cab
Check On The Amazon.comDisclosure: As an Amazon Associate, I earn from qualifying purchases.
| Type | Rubberized floor liners |
| Fit | 2014-2018 Crew Cab |
| Pieces | Front + 2nd row, 3 pc |
| Lips | Raised containment |
| Line | Weatherbeater |
| Use | Year-round truck duty |
✅ Reasons to buy
- The mold Sierra owners name first in forums and groups
- Containment lips hold slush and mud above the carpet line
- Retention points align with factory posts on this platform
❌ Reasons to avoid
- Costs more than the value TPE sets
- Crew Cab SKU only; Double Cab needs a different part
The Weatherbeater 98231 is the default answer in Sierra communities for a reason: the fit is decade-proven and the mud containment is the best here.
If the truck works for a living, this is the buy-once liner. Value shoppers and Double Cab owners have honest options just below, chosen for the mud they face.
2. Cartist Floor Mats for 2014-2018 Chevy Silverado & GMC Sierra 1500 Crew Cab, All Weather TPE — Best Value Full Set
Check On The Amazon.comDisclosure: As an Amazon Associate, I earn from qualifying purchases.
| Type | TPE all-weather liners |
| Fit | 2014-2018 Crew Cab |
| Rows | Front + rear |
| Molding | 3D-scanned |
| Material | Wear-resistant TPE |
| Class | Value |
✅ Reasons to buy
- Scanner-molded coverage near a third of premium pricing
- Blunt listing honesty about Crew-only fitment
- Waterproof wipe-clean surface for farm mud
❌ Reasons to avoid
- No Double Cab or Standard Cab option in this SKU
- Lip height trails the Husky containment
Cartist brings 3D-scanned Sierra coverage to the value tier, and the listing refuses to pretend it fits every cab, and that earns real trust here.
For a daily-driver Sierra that sees gravel roads and parking lots more than job sites, it covers the whole floor for the least money. Mud hunters step to the rows in between.
3. TPE Floor Liner Set for 2014-2018 Silverado/GMC Sierra 1500 Crew Cab, Waterproof Front & Rear Row — Best Waterproof Front-to-Back
Check On The Amazon.comDisclosure: As an Amazon Associate, I earn from qualifying purchases.
| Type | TPE floor liners |
| Fit | 2014-2018 Crew Cab |
| Rows | Front + rear |
| Finish | Waterproof black |
| HD span | 2015-2019 2500/3500 |
| Class | Midprice |
✅ Reasons to buy
- Full-row waterproof behavior aimed at slush and snow states
- Covers the HD trucks’ later model window too
- Black finish hides the winter salt film between washes
❌ Reasons to avoid
- Newer listing with a shorter review history
- Fit tolerance should be checked on arrival
This set is built for the snowbelt Sierra: a waterproof surface over every row, sized across the HD span, at a midprice that undercuts the legacy brands.
Owners in salt states get easier spring cleanouts. Buy with the return window in mind while the mold proves itself on your floor posts.
4. KARPAL Floor Mats for 2014-2019 Chevy Silverado/GMC Sierra 1500, Only Double Cab, TPE Custom Fit — Best Double Cab Fit
Check On The Amazon.comDisclosure: As an Amazon Associate, I earn from qualifying purchases.
| Type | TPE custom liners |
| Fit | Double Cab only |
| Span | 2014-2019 LD |
| HD notes | Footwell coverage |
| Material | All-weather TPE |
| Class | Midprice |
✅ Reasons to buy
- One of the few SKUs that says Double Cab in the headline
- Solves the wrong-cab order problem this platform breeds
- Custom-mold TPE with footwell-focused HD mapping
❌ Reasons to avoid
- Leaves Crew Cab owners to the sets above
- Rear coverage details worth checking for your seat row
KARPAL earns its slot by fixing the platform’s recurring mistake: Double Cab owners ordering Crew molds that never anchor right.
If your 2018 Sierra has the smaller rear doors, this is the honest fit. Crew Cab readers should bounce back to the Husky or Cartist above.
5. LASFIT Floor Mats for Chevy Silverado/GMC Sierra 1500 2014-2018, Only Crew Cab Bucket Seat, Anti-slip — Best Premium Bucket Row
Check On The Amazon.comDisclosure: As an Amazon Associate, I earn from qualifying purchases.
| Type | Laser-fit TPE liners |
| Fit | Crew Cab bucket row |
| Rows | Front only |
| Surface | Anti-slip texture |
| Measuring | Laser templates |
| Class | Premium |
✅ Reasons to buy
- Bucket-seat precision for Denali and SLT console trucks
- Anti-slip texture grips boots on site visits
- LASFIT template reputation across GM platforms
❌ Reasons to avoid
- Premium price covers one row
- Bench-seat trucks need a different SKU
The LASFIT front row speaks to Denali owners: a laser-measured bucket template that clears the console and locks to factory posts.
Add the second row later or run the full-set values above. Either way the bucket-seat trap ends here. Wider comparison lives in our truck floor mats guide.
How We Chose
Sets qualified only when the listing named Sierra fitment and its cab configuration explicitly. This platform’s costliest order mistake is ignoring the Crew and Double floor split.
Ranking weighed containment lips, coverage per dollar, and mold maturity. The Silverado platform sister sits in our Silverado floor mats guide.
Trim First: SLE, SLT, Denali, AT4
An SLE usually rides a bench with simple retention hooks, while SLT and Denali add the floor console and bucket templates. The AT4 trim arrived a year later, so 2018 buyers only weigh the three core trims.
Confirm your front seat shape before the brand. A bucket-molded liner on a bench truck fights the seat bolts, and the reverse order leaves half the floor bare.
Cab Style Changes the Rear Floor
Crew Cab carries four full doors and a wide rear floor; Double Cab has half-size rear doors with a narrower bench and different hook points.
Listings that promise 2014-2018 fitment while hiding the cab SKU are the trap this platform is famous for. Every set above names its configuration up front.
Why Sierra Owners Stay Loyal to Certain Molds
Forum threads and owner groups repeat one pattern. The legacy molds, Husky above all, keep their shape after seasons of boots and cargo, while thin budget liners curl at the posts.
Legacy molds cost more and forgive years. Newer TPE sets trade proven durability for price, which suits leased trucks and light duty. Both routes are represented here honestly.
Lip Height Decides Slush Season
A liner’s vertical lip is the difference between forty ounces of slush sitting on rubber or soaking carpet. Weatherbeater-class lips run highest; value TPE sets trade some height for money.
Snowbelt and farm trucks should rank lip height near the top. Southern commuter trucks can bank the savings and shake out dry dust weekly. Cross-shopping help lives in our car floor mats guide.
GMC-Brand vs Aftermarket Liners
Owners on Sierra forums praise GM’s own liners for fit, but aftermarket molds like the Husky match them on containment and cost less with easier replacement cycles.
Factory mats keep resale purists happy; aftermarket liners keep the carpet new. Both camps agree on one thing: never run smooth universal mats in a working truck.
Cleaning and Seasonal Reset
Pull the liners, hose them at the car wash bay, and dry them in shade before reinstalling; skip solvent cleaners that cloud TPE surfaces.
A ninety-second rinse each season ends the shampoo-and-carpet-battle cycle forever, and the factory carpet underneath stays new enough to matter at trade-in time.
Frequently Asked Questions
What floor mats fit a 2018 GMC Sierra Crew Cab?
Sets molded for 2014-2018 Crew Cab, like the Husky 98231, Cartist, or the waterproof TPE set here, fit the Sierra directly. Confirm cab style before ordering.
Will Silverado mats fit my Sierra?
Yes on this platform: the trucks share floor stampings, so 2014-2018 Silverado liners fit the same-year Sierra in matching cab configurations.
Which mats fit a 2018 Sierra Double Cab?
Pick SKUs that name Double Cab explicitly, like the KARPAL set here. Crew Cab molds will not anchor correctly on the Double floor pan.
Do Sierras with bucket seats need special mats?
Trucks with the floor console run bucket templates, so choose bucket-rated front rows like the LASFIT here. Bench-seat work trucks use their own SKU pattern.
Are OEM GMC liners better than aftermarket?
GM liners fit well and match trim, but aftermarket molds like the Husky match containment at lower cost. Both beat universal mats by a wide margin.
How do I clean TPE truck liners?
Pull them out, rinse with a hose, dry in shade, and reinstall. Ninety seconds per season keeps both the liner and the carpet under it new.
🚗 Free Tool: Car Mat Finder
Pick your car’s make and model — see mats that fit exactly.
Conclusion
Anchor the choice in your trim and cab. The Husky anchors the working Crew Cab, the Cartist covers value duty, and the KARPAL fixes the Double Cab for good.
Denali console trucks get their precision from the LASFIT bucket row, snowbelt owners lean waterproof, and either way the factory carpet stops working for a living.
