Updated October 2026
2018 GMC Sierra 1500 value in Canada
A 2018 GMC Sierra 1500 SLE with 145,000 km is worth about $21,150–$23,700 in a private sale in Canada, and about $13,600 as a trade-in at a dealer (Offro estimate, October 2026). Dealers list the same car for $22,450–$29,100. Trim, mileage, condition and province all move the number — see the tables below.
Prices for a 2018 Sierra 1500 vary more than most with condition, options and history. Treat these values as a starting point, and get an estimate for your exact car.
How much is a 2018 GMC Sierra 1500 worth by trim and mileage?
At 145,000 km, the Denali is worth the most (about $27,650 privately) and the SLE the least (about $23,700).
SLE
- 85,000
- $26,050–$28,350Trade-in $18,600
- 145,000
- $21,150–$23,700Trade-in $13,600
- 205,000
- $15,300–$17,400Trade-in $9,050
SLT
- 85,000
- $28,100–$29,550Trade-in $22,200
- 145,000
- $23,150–$25,250Trade-in $16,300
- 205,000
- $16,800–$18,800Trade-in $10,750
Denali
- 85,000
- $36,050–$36,950Trade-in $30,550
- 145,000
- $26,550–$27,650Trade-in $21,500
- 205,000
- $18,150–$19,700Trade-in $12,750
How much does mileage change the value?
Going from 85,000 km to 205,000 km takes about $10,950 (39%) off the private-sale price of a 2018 Sierra 1500 SLE.
Does condition or an accident change the price?
A clean Sierra 1500 sells for about $300 more than an average one, and a reported accident takes about $100 off.
Rough
- Private sale
- $20,000–$23,150
- Trade-in
- $11,200
Average
- Private sale
- $21,150–$23,700
- Trade-in
- $13,600
Clean
- Private sale
- $21,900–$24,000
- Trade-in
- $15,100
With an accident
- Private sale
- $20,950–$23,600
- Trade-in
- $13,150
Is a 2018 GMC Sierra 1500 worth more in Quebec, Ontario or the West?
It sells for the most in Alberta (about $24,500) and the least in Quebec (about $21,800).
Alberta
- Private sale
- $22,100–$24,500
- Trade-in
- $14,650
British Columbia
- Private sale
- $21,950–$24,250
- Trade-in
- $14,800
Ontario
- Private sale
- $21,150–$23,700
- Trade-in
- $13,600
Nova Scotia
- Private sale
- $19,300–$22,000
- Trade-in
- $11,500
Quebec
- Private sale
- $19,550–$21,800
- Trade-in
- $12,700
What will a 2018 GMC Sierra 1500 be worth next year?
If you drive about 17,000 km, expect roughly $17,900–$20,150 in a private sale by October 2027, about $3,550 less than today. This is a projection, not an offer.
Trade-in, private sale or dealer price: what's the difference?
The trade-in value is what a dealer would likely pay you for the car today. The private-sale range is what to list it at: the low end sells in about 2 weeks, the high end in about 6. The dealer price is what dealers ask when they resell the same car, which includes their reconditioning, warranty and margin.
How does Offro calculate these values?
Offro's price models learn from hundreds of thousands of real vehicle sales and dealer listings across Canada, and we retrain them every week. Each value on this page is the model's estimate for the exact trim, mileage, condition and province shown. Your car's options, history and condition can move it, so get a free estimate for your exact car.
Frequently asked questions
How much is a 2018 GMC Sierra 1500 worth?
A 2018 GMC Sierra 1500 SLE with 145,000 km is worth about $21,150–$23,700 in a private sale in Canada, and about $13,600 as a trade-in at a dealer (Offro estimate, October 2026). Dealers list the same car for $22,450–$29,100. Trim, mileage, condition and province all move the number — see the tables below.
What is the trade-in value of a 2018 GMC Sierra 1500?
About $13,600 for a SLE with 145,000 km in average condition, in a range of $10,350 to $18,000 depending on the car.
What should I list my 2018 Sierra 1500 for?
List at about $23,700 to sell in around 6 weeks, or about $21,150 to sell in around 2 weeks.
How many km is normal for a 2018 Sierra 1500?
About 145,000 km. Canadians drive roughly 17,000 km a year.
Which 2018 Sierra 1500 trim is worth the most?
The Denali, at about $27,650 privately with 145,000 km.
Can I sell my Sierra 1500 to Offro?
In Quebec, Offro can make you a cash offer. Elsewhere in Canada, we can help you sell it for more than a trade-in. Start with a free estimate.
Other years
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