2021 GMC Sierra Denali
VIN: 3GTU9FET1MG352132 | 2021 | General Motors LLC | SILAO, GUANAJUATO, MEXICO
2021 GMC Sierra Denali — 3L 6 Cyl, 4x4, Automatic. Pickup.
D
45/100
Safety & Recall Score: Caution
This score reflects NHTSA safety data only — recalls, complaints, and crash ratings. It does not include title status, accident history, or odometer records. Verify hidden history with VIN Pro Plus →
Composite rating based on recalls, complaints, crash ratings, and vehicle age.
⚠ 10 recall campaigns (very high)
⚠ 668 owner complaints (high)
⚠ No NHTSA crash-test rating available
✓ VIN fully verified
VIN Decoded
VIN Verified- Official VIN decode record located
- Type: TRUCK
- Body: Pickup
- Plant: SILAO, GUANAJUATO, MEXICO
NHTSA Recalls
10 Recall Campaigns- General Motors, LLC. (GM) is recalling certain 2020-2021 Chevrolet...
- General Motors, LLC (GM) is recalling certain 2021-2022 Chevrolet...
- General Motors, LLC (GM) is recalling certain 2019-2021 Chevrolet...
Owner Complaints
668 filed with NHTSA- The contact owns a 2021 GMC Sierra 2500. The...
- The left rear internal "top-hat" parking brake shoes suffered...
Fuel Economy
24 MPG Combined- City: 22 MPG
- Hwy: 26 MPG
- Combined: 24 MPG
- Fuel: Diesel
Technical Specifications
Vehicle Overview
VIN
3GTU9FET1MG352132
Model Year
2021
Make
GMC
Model
Sierra
Trim
Denali
Series
1500
Body Style
Pickup
Vehicle Type
TRUCK
Doors
4
Seats
Not reported by manufacturer
Seat Rows
Not reported by manufacturer
Drive Type
4WD/4-Wheel Drive/4x4
Fuel Type
Diesel
Transmission
Automatic
Engine
3L 6 Cyl
Manufacturer
General Motors LLC
Plant Location
SILAO, GUANAJUATO, MEXICO
Country of Origin
MEXICO
VIN Breakdown
Position 1 — WMI Region
3 → Mexico
Position 2 — Manufacturer
G → General Motors LLC
Position 3 — Vehicle Type
T → TRUCK
Positions 4–8 — Descriptor
U9FET → Sierra Denali
Position 9 — Check Digit
1 → ✓ Valid
Position 10 — Model Year
M → 2021
Position 11 — Plant Code
G → SILAO, GUANAJUATO, MEXICO
Positions 12–17 — Serial
352132 → Production sequence
Engine & Powertrain
Engine Model
LM2
Cylinders
6 Cyl
Displacement
3 L
Displacement CC
3000.0
Displacement CI
183.07123228419
Engine Config
In-Line
Valve Train
Dual Overhead Cam (DOHC)
Turbocharger
Yes
Drive Type
4WD/4-Wheel Drive/4x4
Fuel Type Primary
Diesel
Fuel Economy & Environmental Impact
Fuel Type
Diesel
Combined MPG
24 MPG
City MPG
22 MPG
Hwy MPG
26 MPG
Annual Fuel Cost
$3,900
5-Yr Fuel Cost
$19,500
GHG Score
4/10
CO₂ Emissions
430 g/mi
Barrels/Year
14.88
Safety & Driver Assistance
ABS
Not reported in manufacturer data
ESC
Not reported in manufacturer data
Traction Control
Not reported in manufacturer data
TPMS
Standard (Federal Req.)
Forward Collision Warn
Not reported in manufacturer data
Lane Departure Warning
Not reported in manufacturer data
Lane Keep System
Not reported in manufacturer data
Blind Spot Monitoring
Not reported in manufacturer data
Blind Spot Intervention
Not reported in manufacturer data
Rear Cross Traffic Alert
Not reported in manufacturer data
Adaptive Cruise Control
Not reported in manufacturer data
Parking Assist
Not reported in manufacturer data
Dynamic Brake Support
Not reported in manufacturer data
Pedestrian AEB
Not reported in manufacturer data
Rear Auto Braking
Not reported in manufacturer data
Auto Reverse System
Not reported in manufacturer data
Daytime Running Lights
Not reported in manufacturer data
Adaptive Driving Beam
Not reported in manufacturer data
Keyless Ignition
Not reported in manufacturer data
Auto High Beams
Not reported in manufacturer data
Front Airbags
1st Row (Driver and Passenger)
Side Airbags
1st Row (Driver and Passenger)
Curtain Airbags
All Rows
Knee Airbags
Not reported in manufacturer data
Seat Belt Type
Manual
Pretensioner
Not reported in manufacturer data
Brake System
Hydraulic
Steering Location
Not reported in manufacturer data
Vehicle Dimensions & Weight
Curb Weight
6,947 lbs
GVWR
Class 2F: 7,001 - 8,000 lb (3,175 - 3,629 kg)
Doors
4
Cab Type
Crew/Super Crew/Crew Max
Towing & Utility
GVWR
Class 2F: 7,001 - 8,000 lb (3,175 - 3,629 kg)
Drive Type
4WD/4-Wheel Drive/4x4
Wheels & Tires
TPMS
Standard (Federal Req.)
Manufacturing & Identity
Manufacturer
General Motors LLC
Manufacturer ID
984
Make ID
472
Model ID
1857
Plant City
SILAO
Plant State
GUANAJUATO
Plant Country
MEXICO
Vehicle Descriptor
3GTU9FET*MG
GVWR
Class 2F: 7,001 - 8,000 lb (3,175 - 3,629 kg)
Recall & Safety Summary
Total Recalls
10
Recall Status
Recall campaigns found
Recall Campaigns
10 recall campaigns identified
VIN repair status unknown — verify open recalls with NHTSA or a GMC dealer.
✅ Pre-Purchase Checklist
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Get a Vehicle History ReportUnlock accident history, title status & odometer records with VIN Pro Plus for $4.99 — scroll down to get it.
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Verify All Recalls Are FixedVisit the GMC dealer with this VIN to confirm all 10 recalls are resolved.
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NICB Stolen Vehicle CheckFree check at nicb.org to confirm no theft, salvage, or total-loss history.
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Negotiate Using This ReportUse the 10 recall campaigns as leverage for a lower price.
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Review Title & Lien StatusEnsure no outstanding liens before transfer. Your state DMV can verify title.
Estimated Market Value
Based on vehicle age, class, trim & U.S. market conditions
Market estimate
$27,100–$35,900
Based on vehicle class, age, trim, and U.S. market trends. Verify with Kelley Blue Book or Edmunds for mileage-adjusted value.
💡 This is a general estimate, not real data for this specific vehicle. Get the real, transaction-based Verified Market Value with VIN Pro Plus — $4.99 →
📚 Helpful Vehicle Resources
Safety Ratings
NHTSA has not published a crash-test rating for this 2021 GMC Sierra. This is common for older, lower-volume, or recently-released vehicles that weren't included in NHTSA's crash-testing program.
Safety Recalls
TIRES:TEMPORARY/EMERGENCY SPARE TIRE
General Motors, LLC. (GM) is recalling certain 2020-2021 Chevrolet Silverado 2500 and GMC Sierra 2500 vehicles equipped with a 17" spare tire (RPO ZHQ or ZXT) and either the 20" accessory road tire (RPO REM) or the 18" accessory road...
Risk: An ABS system that cannot control the rear wheels independently increases the risk of a crash.
Remedy: Dealers will provide the appropriate spare tire and apply a new spare tire information label, free of charge. Owner notification letters were mailed on...
SERVICE BRAKES, HYDRAULIC:POWER ASSIST:ELECTRIC:CONTROL MODULE
General Motors, LLC (GM) is recalling certain 2021-2022 Chevrolet Silverado 2500, Silverado 3500, GMC Sierra 2500, and Sierra 3500 vehicles with electronic brake control modules (EBCM) replaced during vehicle assembly. The bolts that attach the brake pressure modulator valve (BPMV)...
Risk: Water in the BPMV may cause an electrical short circuit and increase the risk of fire.
Remedy: Owners are advised to park outside and away from other structures until the recall repair is completed. Dealers will replace the BPMV assembly, free...
SEAT BELTS
General Motors, LLC (GM) is recalling certain 2019-2021 Chevrolet Silverado 1500 and GMC Sierra 1500, 2021 Chevrolet Suburban and Tahoe and GMC Yukon XL and 2020-2021 Chevrolet Silverado 2500 and 3500 and GMC Sierra 2500 and 3500 vehicles. The seat...
Risk: If a seat-belt bracket is not secured, the seat belt may not properly restrain an occupant in the front-row center seat position, increasing the...
Remedy: GM will notify owners, and dealers will inspect left-side and right-side front-row center seat-belt bracket attachments and reassemble it correctly as necessary, free of...
SEAT BELTS
General Motors, LLC (GM) is recalling certain 2020 Chevrolet Bolt EV and 2021 GMC Canyon and Sierra 1500, 2500 and 3500, Yukon, Yukon XL, Cadillac Escalade and Escalade ESV and Chevrolet Blazer, Camaro, Colorado, Equinox, Silverado 1500, 2500 and 3500,...
Risk: If a seat belt assembly is not properly attached to the vehicle, the seat belt may not properly restrain an occupant in the event...
Remedy: GM will notify owners, and dealers will replace the suspect bolts, free of charge. The recall began January 29, 2021. Owners may contact GMC...
LATCHES/LOCKS/LINKAGES:TAILGATE:LATCH
General Motors, LLC (GM) is recalling certain 2020-2024 Chevrolet Silverado 2500, 3500, GMC Sierra 2500 and 3500 vehicles equipped with power-unlatching tailgates. The tailgate's electronic gate-release switch may short circuit due to water intrusion, which can result in the tailgate...
Risk: An unlatched tailgate may open while driving and result in a loss of unsecured cargo, creating a road hazard and increasing the risk of...
Remedy: Owners are advised to check that the tailgate is closed and latched before driving. Dealers will replace the exterior touchpad switch assemblies, free of...
POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE:SOFTWARE
General Motors, LLC (GM) is recalling certain 2020-2022 Chevrolet Silverado 1500, 2500, 3500, GMC Sierra 1500, 2500, 3500, 2021 Cadillac Escalade, Escalade ESV, Chevrolet Tahoe, Suburban, GMC Yukon, and Yukon XL vehicles equipped with diesel engines. The transmission control valve...
Risk: Rear wheel lock-up can increase the risk of a crash.
Remedy: Dealers will install new transmission control module software, free of charge. GM will provide a special coverage program to cover the repair of transmissions...
TIRES
General Motors LLC (GM) is recalling certain 2020 Buick Enclave, Cadillac XT5, GMC Acadia and Chevrolet Traverse vehicles and 2020-2021 Chevrolet Silverado 1500, GMC Sierra 1500 vehicles. The vehicles may have been manufactured with Continental tires that were overcured.
Risk: Overcured tires may experience a carcass break in the sidewall resulting in a sudden air loss or could develop a belt edge separation which...
Remedy: GM will notify owners, and dealers will inspect vehicles and replace tires that have DOT number and production mold number combinations identified by Continental,...
TIRES:TEMPORARY/EMERGENCY SPARE TIRE
General Motors (GM) is recalling certain 2019-2021 GMC Sierra 1500 and Silverado 1500 vehicles equipped with certain accessory road tires and a 17" spare tire. The 17" spare tire provided with the vehicle is not compatible for use with the...
Risk: An ABS system that does not function properly can increase the risk of a crash.
Remedy: Dealers will provide a new 17" spare tire and wheel assembly that is compatible with the accessory wheels, free of charge. Dealers will also...
ENGINE AND ENGINE COOLING:ENGINE:HARD PARTS INTERNAL/MECHANICAL
General Motors LLC (GM) is recalling certain 2021-2024 Cadillac Escalade and Escalade ESV, Chevrolet Silverado 1500, Suburban, and Tahoe, GMC Sierra 1500, Yukon, and Yukon XL vehicles equipped with a 6.2L V8 gas engine. The connecting rod and/or crankshaft engine...
Risk: Engine failure increases the risk of a crash.
Remedy: Dealers will inspect the engine, and as necessary, repair or replace the engine. For vehicles that pass inspection, dealers will add higher viscosity oil,...
POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE:SOFTWARE
General Motors, LLC is recalling certain 2020 Chevrolet Silverado 2500, 3500, GMC Sierra 2500, 3500, and 2020-2022 Chevrolet Silverado 1500 and GMC Sierra 1500 vehicles that may have been repaired incorrectly under recall 24V797. The transmission control valve may fail...
Risk: Rear wheel lock up increases the risk of a crash.
Remedy: Dealers will inspect the vehicles and update the transmission control software, free of charge. Owner notification letters were mailed March 6, 2026. Owners may...
Service bulletins and open investigations aren't part of this report. You can search them for free on NHTSA's site.
Finance & Cost Estimates
🔧 Service & Parts for this 2021 GMC Sierra
$1,820/yr
Estimated Annual Insurance (national avg — varies by driver, location & coverage)
5-Year Cost of Ownership (estimate)
Insurance (5yr)
$9,100
Maintenance (5yr)
$7,500
5-Yr Fuel Cost (EPA)
$19,500
Depreciation (5yr est.)
$12,565
⛽ Fuel Cost Calculator
🏢 Find GMC Dealers
Get this VIN's recalls resolved, service appointments, and CPO program details from an authorized GMC dealer.
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Run Free NICB Check for 3GTU9FET1MG352132 →State Emissions & Lemon Law
Emissions Testing & Lemon Law by State
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OBD-II Check Engine Code Lookup
🔧 Check Engine Light Code Lookup
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Common:
Owner Complaints
The contact owns a 2021 GMC Sierra 2500. The...
The contact owns a 2021 GMC Sierra 2500. The contact stated that while driving at an undisclosed speed, the transmission unexpectedly shifted out of first gear and the...
The left rear internal "top-hat" parking brake shoes suffered...
The left rear internal "top-hat" parking brake shoes suffered a total manufacturing bonding failure, causing the friction lining to completely delaminate and detach from the metal backing plates...
After finishing a long drive south, I shut the...
After finishing a long drive south, I shut the engine off and a yellow engine code popped on. I connected my computer to it and revealed a P129F...
I am reporting repeated failures involving both the transmission...
I am reporting repeated failures involving both the transmission and diesel emissions (DEF) system on my 2021 GMC Sierra 2500HD Denali equipped with the 6.6L Duramax diesel engine...
We keep getting an error message that shows we...
We keep getting an error message that shows we need to service DEF SYSTEM, it also started to limit my MPH and is now locked at 55 MPH....
The contact owns a 2021 GMC Sierra 2500. The...
The contact owns a 2021 GMC Sierra 2500. The contact stated that on several occasions, the automatic power side-out step failed to extend as designed. The vehicle was...
XXX Power Assist Step Reversing I have a 2021...
XXX Power Assist Step Reversing I have a 2021 GMC Sierra 2500HD that the local dealership (Ozark MO 65714) is stating has expired and not covered by the...
The contact owns a 2021 GMC Sierra 2500. The...
The contact owns a 2021 GMC Sierra 2500. The contact stated that while driving at 55 MPH, the vehicle stalled unexpectedly. There were no warning lights illuminated. The...
Showing 8 of 668 complaints. View all on NHTSA →
Maintenance Schedule
Current
Oil & Filter Change
Every 7,500 mi
GMC recommended interval
Due Now
Air Filter (Engine)
Every 15,000–30,000 mi
Dirty filter reduces fuel economy by up to 10%
Due Now
Cabin Air Filter
Every 15,000–25,000 mi
Affects AC, heat, and air quality
Current
Tire Rotation
Every 5,000–7,500 mi
Extends tire life by 25–40%
Due Soon
Brake Inspection
Every 12 months or 15,000 mi
Brake pads typically last 30,000–70,000 mi depending on driving
Due Soon
Spark Plugs
Every 30,000–100,000 mi
Copper plugs every 30k; iridium/platinum every 60–100k
Due Now
Coolant Flush
Every 30,000 mi or 5 years
Old coolant becomes acidic and damages the cooling system
Due Soon
Transmission Fluid
Every 30,000–60,000 mi
Neglected fluid leads to expensive transmission repairs
Due Now
Brake Fluid Flush
Every 2 years
Brake fluid absorbs moisture, lowering boiling point
Due Now
Battery Test
Every 3–5 years
12V batteries typically last 3–5 years
Current
Drive Belt Inspection
Every 60,000–100,000 mi
Serpentine belt failure leaves you stranded
This schedule is a general reference based on make, model year, and powertrain. Always follow your owner's manual for exact intervals.
Additional Tools & Information
Estimated depreciation for this 2021 GMC Sierra based on vehicle class and age. These are projections from today’s general estimate, not past sale prices. Verify with KBB or Edmunds for mileage-adjusted value.
Now
$31,500
+1 yr
$27,700
-12%
+2 yr
$24,600
-22%
+3 yr
$21,400
-32%
Estimates based on vehicle class averages. Actual values vary by mileage, condition, and location.
Estimated annual cost to own this vehicle at average U.S. driving conditions.
Insurance
$1,820/yr
18%
Maintenance
$1,500/yr
15%
Fuel/Energy
$3,900/yr
39%
Depreciation
$2,513/yr
25%
Registration
$250/yr
3%
Estimated Total Annual Cost
$9,983/yr
National averages. Registration varies by state. Does not include parking, tolls, or loan interest.
6.9
/ 10
Rank #12 overall
41 issues / 100 vehicles
GMC Reliability
GMC shares mechanical platforms with Chevrolet with higher trim levels. Reliability track record is nearly identical.
General editorial reference for this manufacturer, not a live or VIN-specific measurement — see the sources below for detailed, current data.
Use this checklist to track which recalls have been resolved. All recall repairs are free at authorized dealerships.
Jul 29, 2021
Sep 29, 2021
Dec 17, 2020
Dec 23, 2020
Jan 2, 2024
Oct 24, 2024
May 11, 2020
Dec 16, 2021
Apr 24, 2025
Dec 2, 2026
Vehicles in a similar class to the 2021 GMC Sierra and their approximate current price range:
Private Party
$23,800–$33,000
No warranty · Lower price · Inspect first
Dealer (Used)
$28,500–$39,500
Some warranty · Financing available
CPO / Certified
$29,300–$41,300
Manufacturer-backed limited warranty · Inspected · Best protection
Negotiation tip:
This vehicle model has 10 recall campaigns on file. Use this as leverage — ask the seller to confirm this specific VIN's recalls are resolved, or reduce the price accordingly. Unresolved recalls cost dealers time and money to fix.
Automated checks against common VIN fraud indicators. Always verify with a paid history report and independent inspection.
✓
Check digit (position 9) validates
✓
VIN is exactly 17 characters
✓
No invalid characters (I, O, Q not present)
✓
Year position (pos 10) matches decoded model year
✓
Manufacturer decodes to a known brand
✓
Not a repeated-character test/placeholder VIN
Manual checks to do in person: Compare the VIN on the dashboard (visible through windshield), driver door jamb sticker, engine block, and title — all must match exactly. A cloned or re-VINed vehicle will show inconsistencies.
⚠ Always check the tire placard on the driver door jamb for the exact manufacturer-specified PSI for your vehicle.
Front Tires
35 PSI (typical)
See door jamb
Rear Tires
65 PSI (typical)
See door jamb
Spare Tire
60 PSI (typical)
Check monthly
Rotation Pattern Guide
FWD: Front to rear straight, rear cross to front
RWD: Rear to front straight, front cross to rear
AWD/4WD: Full X-pattern every 5,000–7,500 mi
Staggered: Side-to-side only if non-directional tires
Recommended rotation interval: every 5,000–7,500 miles. Rotate with every other oil change for best results.
❄ Winter Prep
✓ Check antifreeze concentration (minimum -34°F protection)
✓ Test battery — cold temps reduce capacity 30–60%
✓ Verify tire tread depth (4/32" minimum for snow traction)
✓ Service AWD/4WD differential and transfer case fluids
✓ Replace wiper blades and refill washer fluid (-20°F rated)
✓ Test heater, front/rear defroster, and heated seats if equipped
✓ Inspect fuel lines and check for water in fuel system
☀ Summer Prep
✓ Check coolant level and test radiator cap pressure seal
✓ Inspect serpentine belt for cracking or glazing
✓ Test A/C system output and replace cabin air filter if needed
✓ Check tire pressure — heat increases PSI (recheck cold in a.m.)
✓ Inspect brake pads and rotors before summer road trips
✓ Check transmission fluid color and level
✓ Top off all fluids: brake, power steering, coolant, washer
Original GMC Factory Warranty
Basic / Bumper-to-Bumper
3yr/36k
Has likely ended
Powertrain
5yr/60k
May still be covered
Corrosion / Rust
6yr/100k
May still be covered
Estimated from the model year only. Factory coverage runs from the vehicle's original sale date, which this report can't confirm, and mileage limits can end coverage sooner. Verify remaining coverage with a GMC dealer using the VIN.
Third-Party Extended Warranty Options
CARCHEX
Get Quote →
A+ BBB-rated. 6 plan tiers, up to 500k miles.
Endurance
Get Quote →
Direct-pay at any ASE-certified mechanic.
AUTOPOM!
Get Quote →
Month-to-month plans, high-mileage coverage.
Estimate total fuel cost and stops for any road trip in this 2021 GMC Sierra.
Steps to get the best price when selling this 2021 GMC Sierra:
📄 Service records
Buyers pay more for documented maintenance history. Even basic oil change receipts add value.
🔍 Resolve all recalls
Unresolved recalls suppress resale value and are easy objections for buyers. Fix them free at any dealership.
🚗 Professional detail
A full detail ($150–$300) typically returns $500–$1,500 in perceived value, especially on dark-colored vehicles.
📷 Photograph in good light
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🗂 Vehicle history report link
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🔍 Price using real comps
Search AutoTrader and CarGurus for same year/make/model/trim within 100 miles. Price within 5% of the median.
🔩 Truck bed liner & accessories
A clean bed liner and factory accessories increase perceived value on trucks significantly.
⚠ Check recall status first
This vehicle model has 10 recall campaigns on file. Confirming this specific VIN's recalls are resolved before listing typically increases sale price by more than the time spent.
No model-specific issue notes in our database for this year. The 668 NHTSA complaints filed provide the best available signal — review them in the Owner Complaints section above.
NHTSA offers free recall alerts by VIN. Sign up to be notified the moment a new recall is issued for this vehicle.
🔔 NHTSA SaferCar Alerts
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VIN 3GTU9FET1MG352132:
10 recall campaigns currently on file. Sign up to track when they are resolved.
Get competing insurance quotes for this exact vehicle. Rates vary by 30–60% between carriers for the same driver profile — comparing saves real money.
Estimated national average for this vehicle: $1,820/year. Your actual rate depends on your driving record, location, age, and coverage level.
Frequently Asked Questions
What does VIN 3GTU9FET1MG352132 decode to?
VIN 3GTU9FET1MG352132 decodes to a 2021 GMC Sierra Denali, assembled in SILAO, GUANAJUATO, MEXICO.
How many recalls does this 2021 GMC Sierra have?
NHTSA shows 10 recall campaigns associated with the 2021 GMC Sierra. This reflects campaigns issued for this model/year — it does not confirm whether this specific VIN's repairs have already been completed. Contact a GMC dealer with this VIN to check.
Is it safe to buy a 2021 GMC Sierra with recall campaigns on file?
A recall campaign doesn't necessarily mean the vehicle is unsafe to drive, but any unresolved recall should be addressed promptly. Contact a GMC dealer with this VIN to confirm which specific recalls apply and whether they've already been completed — repairs are always free of charge.
What is the estimated value of this 2021 GMC Sierra?
Based on vehicle age, body type, trim level, and U.S. market data, this 2021 GMC Sierra Denali is estimated at $27,100–$35,900. Verify with Kelley Blue Book or Edmunds for a precise appraisal based on mileage and condition.
Is this VIN check really free?
Yes — the core VIN check on VinForFree is free with no signup required. All data is sourced from public records including NHTSA, the EPA, and official government databases.
What fuel economy does a 2021 GMC Sierra get?
According to EPA data, the 2021 GMC Sierra gets approximately 24 MPG combined (22 city / 26 highway). Estimated annual fuel cost is $3,900.
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