Used 2018 GMC Sierra 1500 for Sale nearModesto, CA

Compare 2018 GMC Sierra 1500 Trims

The 2018 GMC Sierra 1500 offers a range of trims from budget-friendly options to luxurious models, all featuring versatile 4WD capabilities.

• Starting at $19,532
• Best MPG/MPGe: 17 city / 22 hwy
• Most Popular: SLT Crew Cab 4WD

Trim Overview

Prices updated weekly from CarGurus listings.

Quick Compare Table

Listing prices sourced from CarGurus — updated weekly. OEM specs from manufacturer data.

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Trim Deep Dives

Base Double Cab 4WD — "Who It's For"

The Base Double Cab 4WD is the pick for shoppers who want a reliable truck without paying for extra features. It's the most budget-friendly option.

• Avg. market price: $19,532 (updated weekly)
• MPG/MPGe: 17 city / 22 hwy
• Inventory: 196 listings — lower availability; may limit negotiating room
• View Base Double Cab 4WD listings

SLE Double Cab 4WD — "Who It's For"

The SLE Double Cab 4WD is the pick for shoppers who want added features without a hefty price tag. It balances affordability with desirable tech.

• Avg. market price: $21,532 (updated weekly)
• MPG/MPGe: 17 city / 22 hwy
• Inventory: 707 listings
• View SLE Double Cab 4WD listings

SLE Crew Cab 4WD — "Who It's For"

The SLE Crew Cab 4WD is the pick for shoppers who want a spacious interior and modern features without breaking the bank. It offers a great blend of utility and comfort.

• Avg. market price: $23,050 (updated weekly)
• MPG/MPGe: 17 city / 22 hwy
• Inventory: 1,317 listings — widest selection in the lineup
• View SLE Crew Cab 4WD listings

SLT Crew Cab — "Who It's For"

The SLT Crew Cab is the pick for shoppers who want a touch of luxury without the highest price tag. It combines comfort with practical features.

• Avg. market price: $22,620 (updated weekly)
• MPG/MPGe: 16 city / 23 hwy
• Inventory: 220 listings
• View SLT Crew Cab listings

SLT Double Cab 4WD — "Who It's For"

The SLT Double Cab 4WD is the pick for shoppers who want sporty performance with added capability. It’s a solid choice for those needing versatility.

• Avg. market price: $23,805 (updated weekly)
• MPG/MPGe: 16 city / 22 hwy
• Inventory: 247 listings
• View SLT Double Cab 4WD listings

SLT Crew Cab 4WD — "Who It's For"

The SLT Crew Cab 4WD is the pick for shoppers who want a well-rounded truck with luxury features. It’s the most popular trim for good reason.

• Avg. market price: $26,206 (updated weekly)
• MPG/MPGe: 16 city / 22 hwy
• Inventory: 7,629 listings — widest selection in the lineup
• View SLT Crew Cab 4WD listings

Denali Crew Cab 4WD — "Who It's For"

The Denali Crew Cab 4WD is the pick for shoppers who want top-tier luxury and advanced features. It’s ideal for those seeking a premium driving experience.

• Avg. market price: $28,678 (updated weekly)
• MPG/MPGe: 15 city / 20 hwy
• Inventory: 5,217 listings — widest selection in the lineup
• View Denali Crew Cab 4WD listings

Trim Recommendations

Most Popular — SLT Crew Cab 4WD

With 7,629 active listings, the SLT Crew Cab 4WD is the clear volume leader in the lineup.

Browse SLT Crew Cab 4WD listings

Best Budget Option — Base Double Cab 4WD

At $19,532 avg market price — below the lineup median of $23,050 — it's the most accessible entry point.

Browse Base Double Cab 4WD listings

Best for Fuel Economy — Base Double Cab 4WD

The Base Double Cab 4WD offers the best fuel efficiency in the lineup with 17/22 MPG.

Browse Base Double Cab 4WD listings

These recommendations are based on CarGurus' proprietary market data from November 12, 2026, CarGurus experts' opinions, and generative AI.

How much does the 2018 GMC Sierra 1500 cost?

Prices have softened 6.92% compared to this time last year, making it a favorable time to shop this model year.

There are 3,969 listings available, which gives you a solid pool of trucks to compare.

Is the 2018 GMC Sierra 1500 a good car?

Generally — the 2018 GMC Sierra 1500 earns a 4.4/5 user rating and an 8.2/10 expert rating. The model scores 9/10 across Form and function and Safety.

Owners consistently praise its smooth ride, luxurious feel, and comfortable interior, and many also call out its power and fuel efficiency. The Sierra’s comfort-first, family-hauling use case fits shoppers who want a full-size pickup that feels more polished in daily driving. Good and great deals account for 32.2% of listings, which suggests there are still worthwhile opportunities in the market.

Is the 2018 GMC Sierra 1500 reliable?

Owners rate it 4.4/5, a solid signal of long-term satisfaction.

Owner feedback points to a truck that many people find dependable and trouble-free over time, with strong satisfaction around its smooth ride and overall comfort. The expert drive notes also frame it as a truck that can handle daily driving well, especially if you’re already used to pickups. If you’re buying used, the main long-term ownership risk is making sure you avoid examples with the engine or transmission concerns some owners have mentioned.

What should I look for when buying a used 2018 GMC Sierra 1500?

At 66.2% accident-free, a meaningful share of listings has prior incidents — history verification is especially important.

You should start with a vehicle history report and then prioritize a pre-purchase inspection, especially if the truck has higher mileage or a long option list. Focus on body condition, signs of prior repair, and whether the truck’s comfort and convenience features still work as expected. Because some owners have raised concerns about engine performance and transmission issues, a careful road test matters as much as the paperwork.

Key things to evaluate:

• Trim level: The Base truck comes with Bluetooth hands-free connectivity, a 6-speaker stereo, power locks, a power tailgate, a tire pressure monitoring system, and a 7-inch touchscreen, while the SLE adds satellite radio, a Wi-Fi hotspot, and an 8-inch IntelliLink screen. The SLT adds leather seating, heated front seats, dual-zone climate control, and the 5.3-liter V8, while the Denali adds heated and ventilated front seats, a heated steering wheel, navigation, wireless charging, and unique Denali headrest embroidery.
• Powertrain: The Sierra 1500 offers a 4.3-liter V6 with 285 horsepower and 305 pound-feet of torque, a 5.3-liter V8 with 355 horsepower and 383 pound-feet of torque, and a 6.2-liter V8 with 420 horsepower and 460 pound-feet of torque. The V6 and 5.3-liter V8 use a 6-speed automatic, while the 6.2-liter V8 gets an 8-speed automatic.
• Safety package: The standard safety equipment includes a reversing camera with dynamic guidelines, six airbags, StabiliTrak stability control, the LATCH child-seat anchoring system, and Easy Fill Alert. The Enhanced Driver Alert Package adds forward-collision alert, automatic high-beam control, lane-departure warning, and front and rear parking sensors, and it is available on the SLE and SLT and standard on the Denali.
• Infotainment: The base truck uses a 7-inch IntelliLink screen, while all other trims but the Base get an 8-inch touchscreen. IntelliLink includes Apple CarPlay and Android Auto, and the system is described as easy to use.
• Fuel efficiency: The most efficient setups return 18 mpg city, 24 highway, 20 combined, and the conventional 5.3-liter V8 with rear-wheel drive returns 16 mpg city, 23 highway, 19 combined. The test model with the 6.2-liter V8 and 4WD returns 15 mpg city, 20 highway, 17 combined.

Which 2018 GMC Sierra 1500 trim should I buy?

The 2018 GMC Sierra 1500 is offered in 4 trim levels: Sierra 1500, SLE, SLT, Denali.

Here's the short version:

• Sierra 1500: This is the value-focused starting point, and it already gives you the 7-inch IntelliLink screen, Bluetooth, a 6-speaker stereo, power locks, a power tailgate, and standard safety basics. It makes the most sense if you want the lowest entry price and can live without the extra comfort and tech upgrades.
• SLE: This trim adds satellite radio, a Wi-Fi hotspot, and the larger 8-inch IntelliLink screen, which makes it the best-value pick for many shoppers. It also opens the door to more option packages, so it’s the trim to target if you want a better-equipped truck without jumping too far upmarket.
• SLT: This is the comfort step-up, with leather seating, heated front seats, dual-zone climate control, and the standard 5.3-liter V8. If you want a more upscale daily driver and stronger standard power, this is the trim to consider.
• Denali: This is the luxury choice, with heated and ventilated front seats, a heated steering wheel, navigation, wireless charging, and the unique Denali interior touches. It also gets the Enhanced Driver Alert Package standard, which adds forward-collision alert, automatic high-beam control, lane-departure warning, and front and rear parking sensors.

Is now a good time to buy a used 2018 GMC Sierra 1500?

This is a moderate, selective buyer’s market, so you have room to shop carefully without rushing every listing.

• Deal availability: 32.2% of listings are priced as good or great deals.
• Inventory: There are 3,969 listings available.
• Price trend: Prices have softened 6.92% compared with last year.
• Clean inventory: 66.2% of listings are accident-free.

If you find a listing below $25,650, that's toward the low end of the year-round range and worth acting on quickly.

What is the 2018 GMC Sierra 1500's resale value?

The current average of $25,650 sits slightly below last year's $27,558.

That softer pricing suggests the truck has already absorbed some of its near-term depreciation, which can help future resale stability if you buy at the right number. For a seller, the current market shows that condition, trim, and equipment will matter a lot when it’s time to list. Trucks with strong owner satisfaction tend to keep buyer interest longer, especially when they offer the comfort and feature content shoppers want in a used full-size pickup.

Vehicles with solid owner satisfaction ratings, like this model year's 4.4/5, tend to retain buyer demand, which supports resale value over time.

Is the 2018 GMC Sierra 1500 safe?

The 2018 GMC Sierra 1500 earns a 9/10 safety score from our experts.

It comes standard with a reversing camera with dynamic guidelines, six airbags, StabiliTrak stability control, the LATCH child-seat anchoring system, and Easy Fill Alert. The Enhanced Driver Alert Package adds forward-collision alert, automatic high-beam control, lane-departure warning, and front and rear parking sensors, and it is standard on the Denali but not on the SLE or SLT. That means safety equipment is solid overall, but you may want to prioritize a higher trim or a well-equipped example if driver-assistance features matter to you.

Should I buy a 2018 GMC Sierra 1500 or consider a different year?

If you're weighing the 2018 against nearby model years, here's how to think about it:

Choose the 2018 if:

• 32.2% of listings are priced as good or great deals.
• At 66.2% accident-free, a meaningful share of listings has prior incidents — history verification is especially important.
• Price trend: Prices have softened 6.92% compared with last year.
• Owners rate it 4.4/5 — a solid satisfaction signal.
• It adds standard reversing camera and infotainment equipment, which makes it feel more modern than the prior year.

Consider the 2019 if:

• At $30,554, the 2019 costs more than the current year's $25,650 average.
• It was completely redesigned for more capability and usefulness.

The bottom line: If you want the better value today, the 2018 is the smarter buy because it combines lower pricing with strong owner satisfaction and improved standard equipment. If you’re willing to spend more for a redesigned truck, the 2019 is the cleaner upgrade path; if you’re price-sensitive, the 2018 gives you the stronger bargain.

How does the 2018 GMC Sierra 1500 compare to the 2018 Chevrolet Silverado 1500?

These recommendations are based on CarGurus' proprietary market data from November 10, 2026, CarGurus experts' opinions, and generative AI.