Save your search and get notified when new inventory arrives.
Contact seller
Customize your budget
*Estimated payments are calculated by Cars.com and are for informational purposes only. We’ve estimated your taxes based on your provided ZIP code. These estimates do not include title, registration fees, lien fees, or any other fees that may be imposed by a governmental agency in connection with the sale and financing of the vehicle. Other taxes may apply. They do not represent a financing offer or a guarantee of credit from the seller. Actual terms vary by lender.
**Your Saved Vehicles list will be shared along with your contact information when you submit a vehicle request to a dealership. To opt out of this sharing, please view your options on Cars.com Privacy Notice.
About your privacy: Cars.com is asking for your ZIP and credit rating because it helps us to make an educated guess at your sales tax and loan interest. These two factors can greatly change your monthly payment.
Used
2018 GMC Sierra 1500 SLT trucks
for sale
near
Roanoke, TX
- Down Payment
- $0
- Net trade-in value
- $0
- Months
- 72
- APR
- 7.0%
- Sales tax
- 0.0%
*Estimated payments are calculated by Cars.com and are for informational purposes only. We’ve estimated your taxes based on your provided ZIP code. These estimates do not include title, registration fees, lien fees, or any other fees that may be imposed by a governmental agency in connection with the sale and financing of the vehicle. Other taxes may apply. They do not represent a financing offer or a guarantee of credit from the seller. Actual terms vary by lender.
**Your Saved Vehicles list will be shared along with your contact information when you submit a vehicle request to a dealership. To opt out of this sharing, please view your options on Cars.com Privacy Notice.






Used
2018 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
They were great.
They were great. Very attentive, kept checking in with me. Great dealership. I drag my feet too much. I would recommend them to everyone. Great people working tgere
2018 crew cab gmc Sierra 1500
Am in disbelief every week at the Gas Pumps. Thou a big truck, mileage per gallons are 18 +. Last week it was 22.8. This week 19.78.






Used
2018 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
new owner of the gmc denali, 2018 6.2
handles and drives great, the electronics don't always work, mirrors don't always work, spray with wd 40, check engine light, EVAP culprit, auto nation has no luck with this, will drive it till the warrenty expires and its back to ford for me






Used
2018 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
Great place to buy
I have bought several trucks from Kevin, they are my go to place for a good deal. Can't recommend them enough. They even got me a great rate on financing.
best in class
My GMC Sierra is the best ride I have had in all the years that I have been driving. I started driving in 1977. I love my new Sierra.
Used
2018 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
Better than my old truck
The truck has more features than I need. It is quiet and comfortable. it has plenty of power to pull a work trailer. Overall a nice truck






Used
2018 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
I had A great experience with Brenden, I was in and out.
I had A great experience with Brenden, I was in and out. I was able to walk out with what I wanted the whole team was amazing.
This is an attractive and enjoyable vehicle.
I traded my Chevrolet Silverado for this GM Certified GMC Sierra 1500. It is an attractive and enjoyable vehicle. Some years ago I had a GMC and really prefer them over a Chevrolet. This vehicle is just what I need for hauling and general driving.






Used
2018 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
We called about a specific car we found on CL and ended
We called about a specific car we found on CL and ended up spending 4 hours at the dealership to work it out where the price offered matched the listed price on Craigslist. After discussing our experience with the general manager, I'm hopeful that others will not have the same experience.






Used
2018 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
It started in the service department after I arrived in
It started in the service department after I arrived in my 2019 GMC Sierra 1500 with 175,000+ miles. There was a problem with the transmission. After consulting with a few service techs, I decided it was time to buy a new truck. They introduced me to Thomas Swink in the sales department. He was very knowledgeable about all the trucks and he was an excellent salesman. Not pushy at all, but knows how to close a deal. Negotiations were quick and easy. I was able to drive away that same day in the new truck.






Used
2018 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
Great buying experience, much better than other
Great buying experience, much better than other dealerships for buying a vehicle. They didn't force us to add an extended warranty or other typical dealership nonsense.






Used
2018 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
Best Car Buying Experience Ever!!
Jose the Sales Manager listened to what I wanted and found the vehicle at another dealership and brought it over. Briana in Sales showed me all the features and explained how everything works. She even helped me get the app set up on my phone. David in Finance was so friendly and made the process easy. I have told all my friends how nice everybody was to me and this was really a no-stress day. I love them. I wish I could buy a new vehicle every year so I can go back over and over.






Vehicle information
Features
Reviews
I recently purchased a 2020 Mercedes G550 from Top Line
I recently purchased a 2020 Mercedes G550 from Top Line Auto, and I couldn’t be happier! The car is absolutely phenomenal—every detail exceeds my expectations. The service I received was exceptional, going above and beyond to ensure a seamless experience. If you’re in the market for a vehicle, I highly recommend Top Line Auto. They truly deliver excellence in both cars and customer care!






Used
2018 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
Dealership was professional, courteous and committed to
Dealership was professional, courteous and committed to providing a great experience. The sales person provided insights on the car history and features of that model. Buying process was no pressure and straight forward. Would purchase from them again. Car online was exactly what we had seen on internet and priced correctly.






Used
2018 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
I am Very happy with the service I received from
I am Very happy with the service I received from Vandergriff Acura Arlington on May 1, 2024. George Hardwick went over and above helping me do an oil change on my 2020 Alfa Romero. He was very pleasant and efficient. He is one of the reasons my wife and I purchased this Alfa Romero and 3 other car from this dealership over the years.






Used
2018 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
Went to get the oil changed and a few other things.
Went to get the oil changed and a few other things. Maria was very helpful and friendly. When I aske if Reliable replaces windshield, she lead me through what they would do and how much it would cost to replace. Very nice experience






Used
2018 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
The salesperson Norman was great to work with.
The salesperson Norman was great to work with. The dealership had the vehicles that I needed. Easy to get in and out with little wasted time. Highly recommend Norman and Hiley GMC






Used
2018 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
Andres helped my get the best deal for my trade in and
Andres helped my get the best deal for my trade in and put me in a 218 ford raptor, best car buying experience hands down
Vehicle information
Features
Reviews
I've traded in my old Mercedes for a newer model.
I've traded in my old Mercedes for a newer model. From the moment I visited the dealership everyone was very nice, friendly, courteous and professional. They took the time to show me a few cars I was interested in before I was able to make my decision. It has been a fantastic experience and a very smooth transition from beginning to the end, thanks to guys like Joel, Oscar, Mike and Jhonatan. They have made my shopping and driving experience so much smoother than I ever imagined, and of course they made me an offer I couldn't refuse. I strongly recommend the Bishop Maserati dealership for all your car needs. These guys are the best!!!






Used
2018 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
Excellent service!
Excellent service! Got em exactly what I wanted and quick no xx. Nick J is awesome!
Used
2018 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
Sewell is THE BEST...
My second vehicle from this dealership. My second Buick Enclave and it keeps getting better.
There are 20 matching cars close to your year range.






Used
2019 GMC Sierra 1500 SLT
Vehicle information
Features






Vehicle information
Features






Used
2020 GMC Sierra 1500 SLT
Vehicle information
Features






Used
2020 GMC Sierra 1500 SLT
Vehicle information
Features






Used
2019 GMC Sierra 1500 SLT
Vehicle information
Features






Vehicle information
Features






Vehicle information
Features






Used
2020 GMC Sierra 1500 SLT
Vehicle information
Features






Used
2017 GMC Sierra 1500 SLT
Vehicle information
Features






Used
2017 GMC Sierra 1500 SLT
Vehicle information
Features






Used
2020 GMC Sierra 1500 SLT
Vehicle information
Features




Used
2019 GMC Sierra 1500 SLT
Vehicle information
Features






Used
2017 GMC Sierra 1500 SLT
Vehicle information
Features




Used
2019 GMC Sierra 1500 SLT
Vehicle information
Features






Used
2020 GMC Sierra 1500 SLT
Vehicle information
Features






Used
2017 GMC Sierra 1500 SLT
Vehicle information
Features






Used
2019 GMC Sierra 1500 SLT
Vehicle information
Features






Used
2020 GMC Sierra 1500 SLT
Vehicle information
Features






Vehicle information
Features






Vehicle information
Features
-
Prev - 1
-
Next
GMC Sierra 1500 prices by year
Model year | Prices from | Deals |
---|---|---|
2026 GMC Sierra 1500 SLT | $60,500 | |
2025 GMC Sierra 1500 SLT | $39,888 | 6 Great deals |
2020 GMC Sierra 1500 SLT | $21,000 | 8 Good deals |
About the 2018 GMC Sierra 1500 SLT
SLT shown.
- Seating
- 6
- Door count
- 4
- Drivetrain
- Rear Wheel Drive
- Combined MPG
- 19
- Transmission
- 6-Speed A/T
- Engine
- 420.0-hp, 6.2-liter, 8 Cylinder Engine (Gasoline Fuel)

How much does the 2018 GMC Sierra 1500 SLT cost?
The 2018 GMC Sierra 1500 SLT price depends on several factors, including optional features, mileage, vehicle history and location. The nationwide average price for a 2018 Sierra 1500 SLT is $29,668, with pricing starting at $14,900.
What is the MPG of the 2018 GMC Sierra 1500 SLT?
The 2018 GMC Sierra 1500 SLT offers up to 16 MPG in city driving and 23 MPG on the highway for a combined rating of 19 MPG.
These figures are based on EPA mileage ratings and are for comparison purposes only. The actual mileage will vary depending on the selected vehicle options, driving conditions, driving habits, vehicle maintenance, and other factors.
What are some similar vehicles and competitors of the 2018 GMC Sierra 1500 SLT?
The 2018 GMC Sierra 1500 SLT compares to and/or competes against the following vehicles:
Is the 2018 GMC Sierra 1500 SLT reliable?
The 2018 GMC Sierra 1500 has an average reliability rating of 4.7 out of 5 according to Cars.com consumers. Find real-world reliability insights within consumer reviews from 2018 Sierra 1500 owners.
93% of drivers recommend this car
- Comfort 4.9
- Interior 4.8
- Performance 4.7
- Value 4.6
- Exterior 4.8
- Reliability 4.7
SLT (5 styles)
Style | ||||
---|---|---|---|---|
2WD Double Cab 143.5" SLT | 4WD Crew Cab 143.5" SLT | 2WD Crew Cab 143.5" SLT | 4WD Double Cab 143.5" SLT | 4WD Crew Cab 153.0" SLT |
Inventory price | ||||
Starting at $42,800 | Starting at $48,400 | Starting at $45,200 | Starting at $46,000 | Starting at $48,700 |
Combined MPG | ||||
19 | 17 | 18 | 18 | 17 |
Engine | ||||
420.0-hp, 6.2-liter, 8 Cylinder Engine (Gasoline Fuel) | 420.0-hp, 6.2-liter, 8 Cylinder Engine (Gasoline Fuel) | 420.0-hp, 6.2-liter, 8 Cylinder Engine (Gasoline Fuel) | 420.0-hp, 6.2-liter, 8 Cylinder Engine (Gasoline Fuel) | 420.0-hp, 6.2-liter, 8 Cylinder Engine (Gasoline Fuel) |
*Estimated payments are calculated by Cars.com and are for informational purposes only. We’ve estimated your taxes based on your provided ZIP code. These estimates do not include title, registration fees, lien fees, or any other fees that may be imposed by a governmental agency in connection with the sale and financing of the vehicle. Other taxes may apply. They do not represent a financing offer or a guarantee of credit from the seller. Actual terms vary by lender.
**Your Saved Vehicles list will be shared along with your contact information when you submit a vehicle request to a dealership. To opt out of this sharing, please view your options on Cars.com Privacy Notice.
Used 2018 GMC Sierra 1500 SLT by city
-
2018 GMC Sierra 1500 SLT in Keller, TX
3 Great Deals out of 20 listings starting at $21,797
-
2018 GMC Sierra 1500 SLT in Southlake, TX
3 Great Deals out of 21 listings starting at $21,797
-
2018 GMC Sierra 1500 SLT in Colleyville, TX
3 Great Deals out of 21 listings starting at $21,797
-
2018 GMC Sierra 1500 SLT in Grapevine, TX
2 Great Deals out of 20 listings starting at $21,797
-
2018 GMC Sierra 1500 SLT in North Richland Hills, TX
3 Great Deals out of 20 listings starting at $21,797
-
2018 GMC Sierra 1500 SLT in Hurst, TX
3 Great Deals out of 21 listings starting at $21,797
-
2018 GMC Sierra 1500 SLT in Bedford, TX
3 Great Deals out of 22 listings starting at $21,797
- ${price_badge()}
- ${ami_badge()}
- ${battery_badge()}${ev_report_link()}
- ${hot_car_badge()}
- ${award_badge()}
- ${cpo_badge()}
${price_badge_description}
${ami_badge_description}
The EV Battery Rating is based on this vehicle's current expected range relative to the vehicles expected range when new. ${battery_badge_text}
This vehicle is certified pre-owned, backed by a manufacturer warranty, and typically undergoes a rigorous multi-point inspection to ensure quality and reliability.
This vehicle is currently in high demand given its competitive price, desirable features, and overall condition, and may have a higher chance of selling quickly.
${award_blurb}
${award_two_blurb}