2018 GMC Sierra 1500 Depreciation
A 8-year-old 2018 GMC Sierra 1500 has lost about 45.7% of its roughly $48,140 original value. In the 2026 source cohort, it typically listed for around $26,886, with most listings between $23,054 and $31,481. Listed examples average 109,989 miles.
2018 GMC Sierra 1500 Price by Mileage
What buyers actually pay at different odometer readings.
How Mileage Affects 2018 GMC Sierra 1500 Price
Each dot is a real listing — price plotted against odometer reading.
| Mileage | Median price | Listings |
|---|---|---|
| 30k–50k mi | $36,051 | 10 |
| 50k–75k mi | $32,296 | 26 |
| 75k–100k mi | $29,695 | 57 |
| 100k–130k mi | $26,456 | 76 |
| Over 130k mi | $23,679 | 67 |
What's a Good Price for a 2018 GMC Sierra 1500?
Great deal
Under $24,124
Typical
$24,124–$29,989
Overpriced
Above $29,989
Based on the middle 50% of listings — always adjust for mileage and condition.
Price Spread
Range across 238 listings.
Half of all listings fall between $24,124 and $29,989, with a median of $26,881.
Ownership & Condition
Across 238 2018 GMC Sierra 1500 listings.
Certified (CPO)
0.4%
2018 GMC Sierra 1500 Efficiency & Specs
EPA fuel-economy and powertrain data.
Combined
19 MPG
City / Hwy
17 / 23
Fuel / year
$3,200
Fuel
Regular
Engine
5.3L 8-cyl
EPA class
Standard Pickup Trucks 2WD
Depreciation by Trim
See how each 2018 GMC Sierra 1500 trim holds its value.
How the 2018 GMC Sierra 1500 Compares to Other Years
At 45.7% depreciation, the 2018 GMC Sierra 1500 sits among its neighbors on the depreciation curve. The one-year-newer 2019 has lost 38.5% (around $32,858), so stepping up a model year costs roughly $5,972 more. The older 2017 sits at 50.5% (around $24,995), so dropping back a year saves about $1,891. Buying one model year newer or older is one of the easiest ways to trade purchase price against age and remaining warranty.
Safety Ratings
NHTSA crash test ratings for the 2018 GMC Sierra 1500.
Known Issues & Complaints
293 NHTSA complaints, 7 recalls reported.
POWER TRAIN
115 complaintsVehicle Details: 2018 GMC Sierra 1500 Z72 4x4, 5.3L V8 EcoTec3 engine, VIN: [XXX] Mileage at time of incident: 220,000 miles Location: [e.g., Little Rock, Arkansas area or specific road/highway – please provide if desired] What happened: Th
ENGINE
33 complaintsThe lifters in my engine collapsed. This caused a push rod to be bent and the cam shaft to be damaged causing thousands to fix. While I was driving. I could feel the engine malfunction causing my speed to significantly decrease. The vehicle
ELECTRICAL SYSTEM
30 complaintsOdometer Fraud. The contact purchased a 2018 GMC Sierra 1500. The contact discovered that there was a mileage discrepancy after the purchase. The vehicle was a private sale. At the time of purchase, the vehicle mileage was 72,000. It was la
STEERING
29 complaintsPower steering went out for 2-3 seconds as I was making a turn into a street , this happened twice to be exact
SERVICE BRAKES
20 complaintsThe contact owns a 2018 GMC Sierra 1500. The contact stated that while depressing the brake pedal, the brake pedal displayed more resistance than expected, causing the contact to have to apply more pressure while depressing the brake pedal.
UNKNOWN OR OTHER
17 complaintsI’ve owner the vehicle since new. My A/C condenser has failed 3 times, meaning I’m now about to be on my 4th. The welds are weak and it cracks in the same spot 95% of the time. It should last more than a 2 year average.
Top Issues
- POWER TRAIN
- ENGINE
- ELECTRICAL SYSTEM
- STEERING
- SERVICE BRAKES
Buyer Red Flags
- !Recall 19V645000 (SERVICE BRAKES, HYDRAULIC): General Motors LLC (GM) is recalling certain 2015-2017 Cadillac Escalade, 2014-2018 Chevrolet Silverado, GMC Sierra, 2015-2018 Chevrolet Suburban, Tahoe, GMC Yukon vehicles. The am
- !Recall 19V761000 (SERVICE BRAKES, HYDRAULIC): General Motors LLC (GM) is recalling certain 2015-2020 Chevrolet Suburban, Tahoe, and GMC Yukon, and 2014-2018 Chevrolet Silverado 1500 and GMC Sierra 1500 vehicles equipped with a
- !Recall 20V603000 (SERVICE BRAKES, HYDRAULIC): General Motors LLC (GM) is recalling certain 2018 Cadillac Escalade, Chevrolet Silverado 1500 and Tahoe, GMC Sierra 1500 and Yukon vehicles equipped with either a 5.3L or 6.2L V8 e
- !Recall 24V756000 (AIR BAGS): General Motors, LLC (GM) is recalling certain 2018 Chevrolet Silverado 1500, GMC Sierra 1500, 2018-2019 Chevrolet Silverado 2500, 3500, and GMC Sierra 2500, 3500 Crew Cab trucks. T
2018 GMC Sierra 1500 Listings
Real 2018 Sierra 1500 listings on the market now.
$23,988
2018 SLT · Red
27,193 mi · Houston, TX
View listing →
$25,771
2018 · Gray
39,865 mi · Hammond, LA
View listing →
$24,998
2018 · White
43,615 mi · West Carrollton, OH
View listing →
$37,750
2018 SLT · Black
43,940 mi · Murrieta, CA
View listing →
$37,615
Certified2018 SLT · White
46,591 mi · Sullivan, MO
View listing →
$25,389
2018 · White
49,948 mi · North Salt Lake, UT
View listing →
Live dealer listings, refreshed periodically. Prices and availability change.
Frequently Asked Questions
How much is a 2018 GMC Sierra 1500 worth?
A 2018 GMC Sierra 1500 is typically worth around $26,886, with most listings falling between $23,054 and $31,481. The single biggest swing factor is mileage — listed examples average about 109,989 miles, and each additional 10,000 miles shaves a few percent off the price. Condition, accident history, trim, and how many owners a car has had move the number from there. Treat the median as a fair starting point and adjust up for a clean, low-mileage, one-owner car or down for higher mileage and any reported damage.
How much has the 2018 GMC Sierra 1500 depreciated?
The 2018 GMC Sierra 1500 has lost about 45.7% of its original $48,140 base MSRP — roughly $22,000 in value, after adjusting listing prices to typical mileage for the age. Most of a car's lifetime depreciation happens in its earliest years, so a vehicle of this age has usually weathered the steepest part of the curve already. That's what makes a well-kept example at this age an efficient buy: you let the original owner absorb the fastest depreciation, then enjoy a much slower decline from here.
How many miles does a used 2018 Sierra 1500 have?
Listed 2018 Sierra 1500s average about 109,989 miles, with most between 74,391 and 147,619. As a rule of thumb, "average" mileage for any car is roughly 12,000 miles per year of age, so compare a specific listing against that benchmark. A below-average odometer commands a premium and an above-average one a discount, but a higher-mileage car with complete service records and one owner can be a better buy than a low-mileage car with gaps in its history. Consistent maintenance does more for a car's remaining lifespan than a low number on the odometer alone.
What is a good price for a 2018 GMC Sierra 1500?
For a 2018 GMC Sierra 1500, anything under $24,124 is a strong deal, $24,124 to $29,989 is the typical range where most cars trade, and above $29,989 is on the expensive side — those higher prices usually buy lower mileage, a certified warranty, or a premium trim. Always weigh the asking price against the car's specific mileage and condition rather than the sticker alone: a slightly higher price for a clean, one-owner, accident-free example is often money well spent. And treat a listing priced well below the range as a prompt to dig deeper — unusually cheap cars almost always have a reason, whether it's high mileage, accident history, or a branded title.
Methodology
Figures for the 2018 GMC Sierra 1500 are computed from 179 real used-car listings. Each asking price is normalized to a standard 12,000 miles per year for the car's age, adjusted by a 5% asking-to-sale estimate, and compared against the original base MSRP for that VIN's trim. Full methodology. Updated August 2026.