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  *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.
  
  
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  Used
  2018 GMC Sierra 1500 trucks
  for sale
  
  
    near
Columbine Valley, CO 
    
  
      - 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
Great process, no dealer handling or hidden fees Straight
Great process, no dealer handling or hidden fees Straight to the point and no haggle on trade values. Thank you Arsen and the BMW team
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
Gary in sales, Sean in service, and Eric the GM are
Gary in sales, Sean in service, and Eric the GM are awesome. Leased another Jeep! Traded in my prior Jeep that I leased from and serviced with them.
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
Took my 2025 Toyota 4Runner for service to the rear
Took my 2025 Toyota 4Runner for service to the rear liftgate. The power liftgate only worked intermittently. Sometimes it would beep but not open and had to be opened, and closed manually. The service advisor told me the rear liftgate was not in proper alignment and would need to be re-aligned. I made an appointment and then dropped the car off on the appointed day (Tuesday) and it wasn?t ready until Monday after that. The service advisor apologize for it taking so long. I told him I didn?t mind as long as the service/repair was done correctly. On picking up the vehicle, I wanted to check to see if the power buttons on the liftgate worked properly. I showed him that when I pressed the ? lock and close? button on the rear liftgate, it only beeped at me and did not close. He said it was because I have to push the ?lock close? button and then push the ?close? button separately.. My first trip to the store after that, I attempted to use the power open feature on the rear liftgate and it did not work. It only beeped at me. I had to put down the large bag of dog food. I had just bought in order to manually raise the rear liftgate and then manually close it. This was the problem that I took the vehicle in for to be fixed. They had the car for almost a week and the first time I used the feature that wasn?t working before, it failed to work again. I went home and googled, as well as looked in the manual on how to close and lock the rear liftgate. The results of this research said that there are two buttons on the rear liftgate (which I was well aware of). One is just for closing it without locking it, the other is for closing and locking it. You only need to press one or the other, not both buttons as the service advisor had instructed me I needed to do. I am not happy with having spent my hard earned money on a new vehicle, having to take it in to have a problem corrected, and then getting the vehicle back, and the problem has not been rectified. Also, the service advisor needs to know how to properly operate features on the vehicle if he is going to instruct the customer on proper operation.
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
Outstanding customer service / warranty service / repair
Outstanding customer service / warranty service / repair service. Steve, Kevin, and the technicians came through again with a warranty repair in record time. I am very glad I bought an extended warranty to match my lease term, but it would be nothing without the service team here at AutoNation Jeep in Golden. A steering part failed on I25, and we experienced significant ?death wobble? (IYKYK). Steve responded to my text immediately and I went in two days later (my schedule). The whole repair was done in less than 3 hours, and I was on my way. The service department here continues to earn my loyalty each and every time I come in. They are fast, friendly, professional, and demonstrate a genuine concern for me and my Wrangler. Good customer service and good vehicle repair service are hard to find. Both are top tier at this location. Again, it is worth the half-hour drive from our house and more. Thank you from a very satisfied customer!
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 Denali
Vehicle information
Features
Reviews
Thank you Delmar for a great experience!!
A huge thank you to our salesman Delmar Fralick! He provided us with seamless car buying experience to help us purchase the CT5 Sport have been eyeing for a while. Communication, the test drive and paperwork all were very smooth. We have bought from Delmar 3 other times at a different dealership and cannot recommend him enough.
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
Courteous service rep.
Courteous service rep. was immediately available. Close estimate of service time. Waiting area clean and contained TVs and a variety of items to sip or snack on.
 
          
        
       
          
        
       
          
        
       
          
        
       
          
        
       
            Used
2018 GMC Sierra 1500 SLE
Vehicle information
Features
Reviews
The used Chevrolet Camero was in good condition.
The used Chevrolet Camero was in good condition.The office staff was professional and the buying experience smooth. The facility is comfortable and large enough to help many customers.
 
          
        
       
          
        
       
          
        
       
          
        
       
          
        
       
            Used
2018 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
Joey was great service manager.
Joey was great service manager...car service correct and prompt...very positive experience. Car was returned clean and with a full service report. Highly recommend dealership.
 
          
        
       
          
        
       
          
        
       
          
        
       
          
        
       
            Used
2018 GMC Sierra 1500 SLE
Vehicle information
Features
Reviews
I had a great experience buying an old car at this
I had a great experience buying an old car at this dealership. The whole staff was very friendly and helpful. I was looking for one of the cheapest options knowing the vehicle would probably need a little work which can be worrisome if a dealer hides what work needs to be done. That was no issue at Berkenkotter. The staff was upfront about all the known issues with the car and even took it into the shop and walked through the issues with me. The owner of the dealership answered all of my questions and went out of his way to make sure that the car was in good driving condition before I left with it. I've been driving the car for several days without any problem. They didn't pull any tricks and were very honest about the car. They even negotiated on price. I would highly recommend Berkenkotter for their integrity and professionalism.
 
          
        
       
          
        
       
          
        
       
          
        
       
          
        
       
            Used
2018 GMC Sierra 1500 SLE
Vehicle information
Features
Reviews
Great experience, good people
I was in the market for truck and messaged Ryan after finding a great deal off the Sterling Auto website. This was one of the easiest, stress free, no pressure experiences I’ve ever had purchasing a vehicle. I was in and out the door in under 2 hours. Highly recommend. Everyone I met with was kind and straight to the point. I highly recommend and would happily do business with them again.
 
          
        
       
          
        
       
          
        
       
          
        
       
          
        
       
            Used
2018 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
Very helpful staff, great vehicles.
Very helpful staff, great vehicles. Very patient with us. Fair trade in value given to us
 
          
        
       
          
        
       
          
        
       
          
        
       
          
        
       
            Used
2018 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
Good service, nice cars Juan Lagarda was incredible!
Good service, nice cars Juan Lagarda was incredible! He took care of me and his commitment was perfect He is awesome; the best!
 
          
        
       
          
        
       
          
        
       
          
        
       
          
        
       
            Used
2018 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
Great family owned dealership No tricks just good
Great family owned dealership No tricks just good vehicles Nice dogs too Would buy from them again
 
          
        
       
          
        
       
          
        
       
          
        
       
          
        
       
            Used
2018 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
Awesome experience.
Awesome experience. The five star rating is too low, I'd give them a 15 star. No high pressure sales. Everyone was so nice and helpful, treated us like royalty. Roberto listened to what we wanted to look at, he went through the inventory, and we found the one we loved.
 
          
        
       
          
        
       
          
        
       
          
        
       
          
        
       
            Used
2018 GMC Sierra 1500 Denali
Vehicle information
Features
Reviews
Amazing deal
Zee was extremely helpful and did not put any pressure on me to buy the car. He helped me with the application and got me a great deal. Very happy and excited about my new camaro.
 
          
        
       
          
        
       
          
        
       
          
        
       
          
        
       
            Used
2018 GMC Sierra 1500 Denali
Vehicle information
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Reviews
Awesome buying experience
Very good buying experience. We purchased a BMW with the help of Phil. Both Phil and the rest of the staff were always very friendly throughout the buying process and we never felt pressured to buy the vehicle. We were able to test drive the car by ourself and more than one time before buying.
 
          
        
       
          
        
       
          
        
       
          
        
       
          
        
       
            Used
2018 GMC Sierra 1500 Denali
Vehicle information
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Reviews
Five Star Service!
I drove right in, the Service Associate that greeted me was very polite and explained exactly what was going to be done, as I waited for my vehicle he came to check on me and asked if I had any other questions or concerns, it was a great experience and I will certainly be returning to Transwest GMC for all my service needs
 
          
        
       
          
        
       
          
        
       
          
        
       
          
        
       
            Used
2018 GMC Sierra 1500 SLT
Vehicle information
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Happy auto customer
Great customer service , bought 2 cars my family is very impressed with the process and the way everything was so smooth and very informational thank you
 
          
        
       
          
        
       
          
        
       
          
        
       
          
        
       
            Used
2018 GMC Sierra 1500 Denali
Vehicle information
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Buy great deal
Great I have to do this again good staff George sourial was great handling my purchase. Would recommend every one to going and get a quality vehicle.
 
          
        
       
          
        
       
          
        
       
          
        
       
          
        
       
            Used
2018 GMC Sierra 1500 SLT
Vehicle information
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I live in another state and this was my first experience
I live in another state and this was my first experience buying a car without driving it first. Very pleased with my car. Thank you Ryan for all your help in making this happen. Service was amazing.
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GMC Sierra 1500 prices by year
| Model year | Average price | Deals | 
|---|---|---|
| 2026 GMC Sierra 1500 | $69,367 | |
| 2025 GMC Sierra 1500 | $60,312 | 2 Good deals | 
| 2024 GMC Sierra 1500 | $55,382 | 9 Great deals | 
| 2023 GMC Sierra 1500 | $49,478 | 7 Great deals | 
| 2022 GMC Sierra 1500 | $42,051 | 20 Good deals | 
| 2021 GMC Sierra 1500 | $37,809 | 17 Good deals | 
| 2019 GMC Sierra 1500 | $34,712 | 7 Good deals | 
About the 2018 GMC Sierra 1500
Base shown (base trim).
- Seating
- 3
- Door count
- 2
- Drivetrain
- Rear-wheel drive
- Combined MPG
- 20
- Transmission
- 6-Speed A/T
- Engine
- 285.0-hp, 4.3-liter, V6 Cylinder Engine (Flex Fuel Capability)
 
          How much does the 2018 GMC Sierra 1500 cost?
The 2018 GMC Sierra 1500 price depends on several factors, including the trim level, optional features, mileage, vehicle history and location. The nationwide average price for a 2018 Sierra 1500 is $28,287, with pricing starting at $11,595.
What is the MPG of the 2018 GMC Sierra 1500?
The 2018 GMC Sierra 1500 offers up to 18 MPG in city driving and 24 MPG on the highway for a combined rating of 20 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 trim, driving conditions, driving habits, vehicle maintenance, and other factors.
Is the 2018 GMC Sierra 1500 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.
Is the 2018 GMC Sierra 1500 a good truck?
Below are the Cars.com consumer ratings for the 2018 GMC Sierra 1500.
- Comfort 4.9
- Interior 4.8
- Performance 4.7
- Value 4.6
- Exterior 4.8
- Reliability 4.7
93% of drivers recommend this car
- Comfort 4.9
- Interior 4.8
- Performance 4.7
- Value 4.6
- Exterior 4.8
- Reliability 4.7
Base (10 styles)
| Style | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 2WD Crew Cab 143.5" | 4WD Crew Cab 143.5" | 4WD Double Cab 143.5" | 2WD Double Cab 143.5" | 4WD Crew Cab 153.0" | 2WD Crew Cab 153.0" | 4WD Reg Cab 119.0" | 2WD Reg Cab 119.0" | 2WD Reg Cab 133.0" | 4WD Reg Cab 133.0" | 
| Inventory price | |||||||||
| Starting at $35,500 | Starting at $38,700 | Starting at $37,000 | Starting at $33,000 | Starting at $40,100 | Starting at $36,900 | Starting at $32,900 | Starting at $29,000 | Starting at $29,300 | Starting at $33,200 | 
| Combined MPG | |||||||||
| 20 | 19 | 19 | 20 | 18 | 19 | 19 | 20 | 20 | 19 | 
| Engine | |||||||||
| 285.0-hp, 4.3-liter, V6 Cylinder Engine (Flex Fuel Capability) | 285.0-hp, 4.3-liter, V6 Cylinder Engine (Flex Fuel Capability) | 285.0-hp, 4.3-liter, V6 Cylinder Engine (Flex Fuel Capability) | 285.0-hp, 4.3-liter, V6 Cylinder Engine (Flex Fuel Capability) | 355.0-hp, 5.3-liter, 8 Cylinder Engine (Gasoline Fuel) | 355.0-hp, 5.3-liter, 8 Cylinder Engine (Gasoline Fuel) | 285.0-hp, 4.3-liter, V6 Cylinder Engine (Flex Fuel Capability) | 285.0-hp, 4.3-liter, V6 Cylinder Engine (Flex Fuel Capability) | 285.0-hp, 4.3-liter, V6 Cylinder Engine (Flex Fuel Capability) | 285.0-hp, 4.3-liter, V6 Cylinder Engine (Flex Fuel Capability) | 
Denali (3 styles)
| Style | ||
|---|---|---|
| 4WD Crew Cab 153.0" Denali | 2WD Crew Cab 143.5" Denali | 4WD Crew Cab 143.5" Denali | 
| Inventory price | ||
| Starting at $56,300 | Starting at $52,900 | Starting at $56,000 | 
| Combined MPG | ||
| 17 | 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) | 
SLE (10 styles)
| Style | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 2WD Reg Cab 119.0" SLE | 4WD Reg Cab 133.0" SLE | 4WD Reg Cab 119.0" SLE | 2WD Reg Cab 133.0" SLE | 4WD Double Cab 143.5" SLE | 2WD Double Cab 143.5" SLE | 4WD Crew Cab 153.0" SLE | 2WD Crew Cab 153.0" SLE | 2WD Crew Cab 143.5" SLE | 4WD Crew Cab 143.5" SLE | 
| Inventory price | |||||||||
| Starting at $35,700 | Starting at $39,900 | Starting at $39,600 | Starting at $35,800 | Starting at $42,100 | Starting at $38,300 | Starting at $46,100 | Starting at $42,100 | Starting at $40,700 | Starting at $44,700 | 
| Combined MPG | |||||||||
| 20 | 19 | 19 | 20 | 19 | 20 | 18 | 19 | 20 | 19 | 
| Engine | |||||||||
| 285.0-hp, 4.3-liter, V6 Cylinder Engine (Flex Fuel Capability) | 285.0-hp, 4.3-liter, V6 Cylinder Engine (Flex Fuel Capability) | 285.0-hp, 4.3-liter, V6 Cylinder Engine (Flex Fuel Capability) | 285.0-hp, 4.3-liter, V6 Cylinder Engine (Flex Fuel Capability) | 285.0-hp, 4.3-liter, V6 Cylinder Engine (Flex Fuel Capability) | 285.0-hp, 4.3-liter, V6 Cylinder Engine (Flex Fuel Capability) | 355.0-hp, 5.3-liter, 8 Cylinder Engine (Gasoline Fuel) | 355.0-hp, 5.3-liter, 8 Cylinder Engine (Gasoline Fuel) | 285.0-hp, 4.3-liter, V6 Cylinder Engine (Flex Fuel Capability) | 285.0-hp, 4.3-liter, V6 Cylinder Engine (Flex Fuel Capability) | 
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.
  
Research the 2018 GMC Sierra 1500
Compare the 2018 GMC Sierra 1500
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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.
