2021 GMC Sierra: trims, real prices & how to pick yours

250 builds left the factory as a 2021 Sierra, each a different combination of engine, transmission and body identified by the first eight characters of its VIN. The 136 main configurations sell for $16,500–$69,999 today. Page 1 of 5.

  • 136 main configurations
  • 159,876 vehicles built
  • 4,295 for sale right now
  • $16,500–$69,999 typical price range

Which Sierra is yours?

Enter a VIN — the 17 characters on the windshield or the title — and we’ll match it to its exact factory configuration, typical price and equipment.

Works with any VIN — a different year or model takes you straight to its own page.

Pick your Sierra

What actually differs

AT4 · 4WD 3GTP9EED-M AT4 · 4WD 3GTP9EEL-M Elevation · 4WD SLT · 4WD
Engine 5.3L 8-cyl 6.2L 8-cyl 3L 6-cyl 5.3L 8-cyl
Fuel Gasoline Gasoline Diesel Gasoline
Typical price today $37,840 $39,614 $32,998 $35,489
For sale right now 170 197 190 131
Vehicles built 6,805 6,525 5,542 4,797
Same on every 2021 Sierra
  • Drivetrain Four-wheel drive
  • Body Pickup
  • Doors 4-door

What people actually pay

6,192 price observations · updated Aug 30, 2026
AT4 · 4WD 3GTP9EED-M
$37,840
AT4 · 4WD 3GTP9EEL-M
$39,614
Elevation · 4WD
$32,998
SLT · 4WD
$35,489
AT4 · 4WD 1GT49PEY-M
$52,284
Denali · 4WD
$40,000
$21,358 $34,043 $46,729 $59,414 $72,099
Price trend

Median down $202 over the last 7 months.

2021 Sierra price history →
Will it hold value?

A Sierra typically keeps about 63% of its price over 5 years — a 5-year-old one runs about $22,995 today.

Sierra depreciation by year →
Cost to run

23/30 mpg city/highway. Roughly $1,790/yr on fuel at 15,000 miles.

EPA estimate for the 2021 Sierra

Safety, in plain English

What 1GT49SEY-M means

1GT 49SEY · M
1GT
the World Manufacturer Identifier GMC registered — assembled in the United States
49SEY
together encode the Sierra line — Pickup, 6.6L 8cyl, Four-wheel drive — as GMC filed it, these five characters are read as one block, not letter by letter
M
in position 10 — model year 2021
9, 11–17
differ on every car: check digit, plant code and the serial number
20 rare configurations — mostly fleet, export or irregular VIN patterns. Fewer than 20 known vehicles each.

Already looking at a specific Sierra?

Paste its VIN — we’ll open that exact car’s page: its configuration, market position and every listing we’ve tracked.

2021 GMC Sierra prices →