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Used
2020 GMC Sierra 3500 SLE trucks
for sale
near me
- 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
2020 GMC Sierra 3500 SLE
Vehicle information
Features
Reviews
The sales person Luis was great and very helpful.
The sales person Luis was great and very helpful. Went out of his way to get the car delivered to me. He drove it 3.5 hrs so I can have it in time for a road trip. Also they managed to beat the best APR I got from a credit union. All in all it was a professional and positive experience.
Great Diesel truck when emission sensors work
Great vehicle for pulling my fifth wheel RV which weighs around 20,000 pounds. This dually truck pulls the RV very nicely without any significant strain on the engine or the transmission. However, like all of today's diesel engines there are 4 different system of emissions on this truck. Each one of these emission systems has sensors associated with them. If one of these sensors goes bad the truck will not perform optimally and sometimes it will go into the limp mode. Unfortunately this is not unique to GMC trucks. All manufacturers are battling this system. Also, I have had to take the truck to the dealer for computer upgrades in order to improve performance. I wish these upgrades could be performed on line (through wifi or with my own phone service). It sure would make things a lot simpler and improve the through put of the dealers who are already strained because of the limited number of available diesel mechanics.
Vehicle information
Features
Reviews
Easy Process Thank You
Awesome service Thank You!! Easy online application process looking for a Mercedes Benz and you guys had it in stock and ready to go. John was pleasant to work with
Great car for work!!
Comfort, ease of driving, style, convenient for work and we LOVE the tailgate! Great for towing our heavy fifth wheel and our dogs are riding in style!!
Used
2020 GMC Sierra 3500 SLE
Vehicle information
Features
Reviews
I asked Cae Douville to find me a certain truck by next
I asked Cae Douville to find me a certain truck by next spring, it only took her 4 days to find exactly what I was looking for, she was amazing, friendly and patient with all my requests, because of her I will definitely be back!
Great luxury ride with great pulling capabilities.
The Texas Edition combined with the X31 package and premium SLT makes a very nice combination. The Sierra 3500HD gives you a luxury interior and ride with all the capabilities of a great pulling truck. The Duramax is quiet yet powerful. It is no doubt the best of trucks for 2020.
Used
2020 GMC Sierra 3500 SLE
Vehicle information
Features
Reviews
Really impressed with the performance
Nicest truck I have ever owned preforms great with my RV Truck is comfortable and still works great when you need it to preform. Ride is nice and very roomy for all that want to travel with me
Used
2020 GMC Sierra 3500 SLE
Vehicle information
Features
Reviews
After my experience with my sales team Camary and
After my experience with my sales team Camary and Giselle, as well as the whole dealership I had to come online and share. I’d just like to big the biggest thank and shout out to Camary and Giselle plus the whole Toyota dealership at this location !!! (: From the moment I arrived to the very moment I left I was treated with the most respect, kindness and supportive spirit ever from everyone at the dealership! They were beyond informative about everything I was getting into, they broke everything down from the start to finish. They helped understand things that we didn’t know about as well as get set up with the best perks and benefits ! I would just really like to thank the sales representatives Giselle and Camary again!!! They both went above and beyond to be able to get me an amazing brand new 2025 truck out the lot at such an amazing absolute reasonable price !!!! Everybody was so transparent about the process and the information and what to do moving forward. They even provided Additional important information about the car that I traded in that I did not even know about. This is an amazing team and dealership. I truly thank everybody involved in the process. I definitely will be back for my fiancé in a few months and hopefully as well as my grandma.
Good power very comfortable ride
Good power plenty of room the truck has all kind of new technology in it that helps with driving safety and with job performance Awesome
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GMC Sierra 3500 prices by year
| Model year | Average price | Deals |
|---|---|---|
| 2026 GMC Sierra 3500 SLE | 2 Good deals | |
| 2025 GMC Sierra 3500 SLE | $58,496 | 5 Great deals |
| 2024 GMC Sierra 3500 SLE | $55,533 | 32 Good deals |
| 2023 GMC Sierra 3500 SLE | $49,454 | 6 Great deals |
About the 2020 GMC Sierra 3500 SLE
SLE shown.
- Seating
- 3
- Door count
- 2
- Drivetrain
- Rear Wheel Drive
- Combined MPG
- 0
- Transmission
- 6-Speed A/T
- Engine
- 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel)
How much does the 2020 GMC Sierra 3500 SLE cost?
The 2020 GMC Sierra 3500 SLE price depends on several factors, including optional features, mileage, vehicle history and location. The nationwide average price for a 2020 Sierra 3500 SLE is $43,165, with pricing starting at $39,924.
What are some similar vehicles and competitors of the 2020 GMC Sierra 3500 SLE?
The 2020 GMC Sierra 3500 SLE compares to and/or competes against the following vehicles:
Is the 2020 GMC Sierra 3500 SLE reliable?
The 2020 GMC Sierra 3500 has an average reliability rating of 4.9 out of 5 according to Cars.com consumers. Find real-world reliability insights within consumer reviews from 2020 Sierra 3500 owners.
100% of drivers recommend this car
- Comfort 4.9
- Interior 4.9
- Performance 4.9
- Value 4.7
- Exterior 5.0
- Reliability 4.9
SLE (8 styles)
| Style | |||||||
|---|---|---|---|---|---|---|---|
| 4WD Crew Cab 172" SLE | 2WD Crew Cab 172" SLE | 4WD Crew Cab 159" SLE | 2WD Crew Cab 159" SLE | 4WD Reg Cab 142" SLE | 2WD Reg Cab 142" SLE | 4WD Double Cab 162" SLE | 2WD Double Cab 162" SLE |
| Inventory price | |||||||
| Starting at $48,400 | Starting at $45,600 | Starting at $48,200 | Starting at $45,400 | Starting at $44,400 | Starting at $41,600 | Starting at $46,600 | Starting at $43,800 |
| Combined MPG | |||||||
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Engine | |||||||
| 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) | 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) | 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) | 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) | 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) | 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) | 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) | 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel 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.
GMC Sierra 3500 trims
-
GMC Sierra 3500 2020 Denali
10 Great Deals out of 111 listings starting at $37,203
-
GMC Sierra 3500 2020 AT4
22 listings starting at $39,497
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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.
