Twin Pine Ford · Ephrata, PA

2021 GMC Sierra 1500 AT4

75,009 miles · truck

1 / 29 photos

PUBLISHED DEALER DETAILS

Complete vehicle specifications

Year2021

MakeGMC

ModelSierra 1500

TrimAT4

VIN3GTP9EEL5MG321411

Stock numberG21411

Mileage75,009 miles

BodyPickup

Engine6.2L V8 16V GDI OHV

Cylinders8

Displacement6.2L

Transmission10-Speed Automatic

Drivetrain4WD

FuelGasoline

MPG15 city / 19 hwy

ExteriorEbony Twilight Metallic

InteriorJet Black

Vehicle description

Twin Pine Ford has the Nicest Inventory at the Best Prices! This 2021 GMC Sierra 1500 AT4 delivers commanding presence and serious capability. Finished in Black with a powerful EcoTec3 6.2L V8 engine paired to a 10-speed automatic transmission and 4WD, this truck is built for work and play. With under 76,000 miles, it represents an excellent value for buyers seeking a mid-size truck with proven reliability and premium features. Key Features: - Technology Package with Premium GMC Infotainment System and Navigation - AT4 Premium Package - Driver Alert Package II - 20 Machined Aluminum Wheels with Carbon Grey Metallic Accents - All-Weather Floor Liners (1st and 2nd rows) - Premium Bose 7-Speaker Sound System with SiriusXM 360L - Advanced Safety: Adaptive Cruise Control, Lane Keep Assist, Forward Collision Alert, Automatic Emergency Braking - Heated and Ventilated Front Seats with 10-Way Power Adjustment - Apple CarPlay and Android Auto Integration - HD Surround Vision with Rear Camera Mirror and Bed View Camera The AT4 trim provides aggressive styling and genuine off-road capability. This truck comes equipped with an off-road suspension, hill descent control, and integrated trailering technology. Inside, you'll find premium leather-appointed seating, dual-zone climate control, heated steering wheel, and a multicolor head-up display. The truck delivers an EPA-estimated 15 city and 19 highway MPG, balancing performance with reasonable fuel economy. We invite you to visit our showroom and experience this Sierra 1500 AT4 firsthand. Contact us today to schedule a test drive. * All of our cars go through our Twin Pine Certified Process * While every reasonable effort is made to ensure the accuracy of this information, we are not responsible for any errors or omissions contained on these pages. Please verify any information in question with Twin Pine Ford (717)-733-FORD FORD *Prices exclude government fees such as: taxes and registration fees* Twin Pine Ford will only accept outside 3rd Party financing in the event we cannot match customers Pre-Approved rate. (See dealer for details.) Disclaimer: We are not able to finance customers from the following states: Alaska, Arizona, California, Iowa, Kansas, Minnesota, North Dakota, South Dakota, Oklahoma, Ohio and/or Tennessee. However, these customers are welcome to secure their own financing.

Features & options (176)

Adaptive Cruise Control
Bluetooth®
Heated Steering Wheel
Remote Start
4WD/AWD
Android Auto
Apple CarPlay
Heated Seats
Keyless Entry
Leather Seats
Wi-Fi Hotspot
Auto Dimming Mirror
Automatic High Beams
Emergency Brake Assist
Lane Departure Warning
Lane Keep Assist
Wireless Phone Charging
Blind Spot Monitor
Forward Collision Warning
Navigation System
Parking Assistance
Rear View Camera
Satellite Radio
Tow Hitch/Tow Package
Alloy Wheels
AT4 Preferred Package
AT4 Premium Package
Driver Alert Package I
Driver Alert Package II
Preferred Equipment Group 4SB
Technology Package
Trailering Package
6 Speakers
6-Speaker Audio System Feature
AM/FM radio: SiriusXM with 360L
Premium audio system: GMC Infotainment System
Premium Bose 7-Speaker Sound System
Radio data system
Radio: Premium GMC Infotainment Sys w/Multi-Touch
Radio: Premium GMC Infotainment Sys w/Navigation
SiriusXM w/360L
Steering Wheel Audio Controls
Air Conditioning
Automatic temperature control
Electric Rear-Window Defogger
Front dual zone A/C
Rear window defroster
12-Volt Rear Auxiliary Power Outlet
120-Volt Bed Mounted Power Outlet
120-Volt Instrument Panel Power Outlet
Driver Memory
Memory seat
Power driver seat
Power Front Passenger Windows w/Express Up/Down
Power Front Windows w/Driver Express Up/Down
Power Rear Windows w/Express Down
Power steering
Power windows
Remote keyless entry
Remote Vehicle Starter System
Steering wheel mounted audio controls
Universal Home Remote
Auto-Locking Rear Differential
Electrical Lock Control Steering Column
Manual Tilt-Wheel & Telescoping Steering Column
Off-Road Suspension
Speed-sensing steering
Traction control
4-Wheel Disc Brakes
ABS brakes
Dual front impact airbags
Dual front side impact airbags
Front anti-roll bar
Front wheel independent suspension
Keyless Open & Start
Low tire pressure warning
Occupant sensing airbag
Overhead airbag
Power Door Locks
Brake assist
Electronic Stability Control
Hill Descent Control
Delay-off headlights
Front fog lights
Fully automatic headlights
Perimeter Lighting
Panic alarm
Security system
Theft Deterrent System (Unauthorized Entry)
Speed control
170 Amp Alternator
Auxiliary External Transmission Oil Cooler
Heavy-Duty Air Filter
AT4 High Clearance Step (LPO)
Auto-dimming door mirrors
Body-Color Surround Grille
Bumpers: body-color
Front License Plate Kit
Heated door mirrors
IntelliBeam Automatic High Beam On/Off
LED Cargo Area Lighting
Power door mirrors
ProGrade Trailering System
Rear step bumper
Rear Wheelhouse Liners
Spray-On Pickup Bed Liner w/AT4 Logo
2 USB Ports
2 USB Ports (1st Row)
4.2" Diagonal Color Display Driver Info Center
4G LTE Wi-Fi Hotspot Capable
8" Driver Information Center
All-Weather Floor Liners w/AT4 Logo (LPO)
Apple CarPlay/Android Auto
Auto-dimming Rear-View mirror
Automatic Emergency Braking
Bed View Camera
Color-Keyed Carpeting Floor Covering
Compass
Driver door bin
Driver vanity mirror
Floor-Mounted Center Console
Following Distance Indicator
Forward Collision Alert
Front Pedestrian Braking
Front Prem Floor Liners w/Removable Carpet Insert
Front reading lights
GMC Connected Access Capable
HD Rear Vision Camera
HD Surround Vision w/2 Trailer View Camera Provisions
Illuminated entry
Lane Change Alert w/Side Blind Zone Alert
Lane Keep Assist w/Lane Departure Warning
Multicolor 15" Diagonal Head-Up Display
OnStar & GMC Connected Services Capable
Outside temperature display
Overhead console
Passenger vanity mirror
Rear Camera Mirror
Rear Cross Traffic Alert
Rear Dual USB Charging-Only Ports
Rear Prem Floor Liners w/Removable Carpet Insert
Rear reading lights
Rear seat center armrest
Safety Alert Seat
Tachometer
Telescoping steering wheel
Tilt steering wheel
Trip computer
Ultrasonic Front & Rear Park Assist
Voltmeter
Wireless Charging
10-Way Power Driver Seat Adjuster w/Lumbar
10-Way Power Passenger Seat Adjuster w/Lumbar
Front Bucket Seats
Front Center Armrest
Heated 2nd Row Outboard Seats
Heated Driver & Front Outboard Passenger Seating
Heated front seats
Perforated Leather-Appointed Front Seat Trim
Power passenger seat
Split folding rear seat
Ventilated Driver & Front Passenger Seats
Ventilated front seats
Passenger door bin
Hitch Guidance
Hitch Guidance w/Hitch View
In-Vehicle Trailering App
Integrated Trailer Brake Controller
Red Recovery Hooks
18" x 8.5" Machined Aluminum Wheels
Wheel Locks (Set of 4) (LPO)
Wheels: 20" x 9" Machined Aluminum
Deep-Tinted Glass
Power Sliding Rear Window w/Rear Defogger
Variably intermittent wipers
3.23 Rear Axle Ratio

Dealer-provided information may change. Confirm availability, price, vehicle condition, taxes and fees with the selling dealership.

AutosXchange Intel

Vehicle price analysis

Live listings · within 100 miles of Ephrata, Pennsylvania

Asking price$37,900Dealer asking price · 75,009 mi

Market value$34,599Market value · based on 3 comparable cars

vs. market High price+9.5%High price · based on 3 comparable cars

Where this price sits

In the typical middle range · 33% of 3 similar listings ask more than this car.

Market value $34,599

This car$37,900

$31,900lowest$45,503highest

Middle 50% of asking pricesMarket valueThis car

Price vs. market value

−25%Market value+25%

High price$3,301 above the market value of $34,599

Price range

$31,900$45,503

3rd lowest price of 4 similar listings within 100 milesTick marks the market value · range of 3 similar listings

AutosXchange Insights

Compared with 3 used 2021–2022 GMC Sierra 1500 AT4 listings within 100 mi.
Priced $3,301 above the market value of 3 comparable cars — compare options, condition and history.
3rd lowest price of 4 similar listings within 100 miles.
Has about 3,000 fewer miles than similar listings.
About 12,502 miles per year of age (U.S. average is roughly 12,000–14,000).
Stock # G21411 — mention it when you call or text.

How we calculate market value: comparable cars for sale now plus their last listed prices.

Price history

Price tracked by AutosXchange since Nov 11, 2026. No price change at this dealership since Nov 11 ($37,900).

AutosXchange Intel Hub: Price changes for this model in Pennsylvania · This model in the Intel Hub · Market movers in Pennsylvania

Dealer-advertised asking prices as observed by AutosXchange (data as of Nov 12); earlier listings at other dealerships are shown by state only. Source: AutosXchange Intel Hub, autos-xchange.com/market.

Cars this price is compared to

Same 2021–2022 Sierra 1500 AT4 · used · any miles · within 100 miles of Ephrata, Pennsylvania. All 3 comparable cars for sale, nearest first.

32 photosCARFAX

2022 GMC Sierra 1500 AT4

$45,503est. $783/mo

$7,603 more than this car

38,797 mi
4WD
Automatic
Diesel
Truck

Anderson Buick GMC · Cockeysville, MD · 53 mi away

0 viewsStock # TF375607A

Check availability Call

2021 GMC Sierra 1500 AT4 for sale at Koons Toyota of Westminster in Westminster, MD

Great deal

14 photosCARFAX

2021 GMC Sierra 1500 AT4

$31,900est. $549/mo

$6,000 less than this car

96,675 mi
Automatic
Gasoline
Truck

Koons Toyota of Westminster · Westminster, MD · 61 mi away

0 viewsStock # MG449850T

Check availability Call

2021 GMC Sierra 1500 AT4 for sale at Freehold Subaru in Freehold, NJ

Fair price

22 photosCARFAX

2021 GMC Sierra 1500 AT4

$34,599est. $596/mo

$3,301 less than this car

78,475 mi
4WD
10-Speed Automatic
Gasoline
Truck

Freehold Subaru · Freehold, NJ · 100 mi away

0 viewsStock # DU199220

Check availability Call

2022 GMC Sierra 1500 AT438,797 miles · Anderson Buick GMC · Cockeysville, MD · 53 mi away$45,503$7,603 more than this car

2021 GMC Sierra 1500 AT496,675 miles · Koons Toyota of Westminster · Westminster, MD · 61 mi away$31,900$6,000 less than this car

2021 GMC Sierra 1500 AT478,475 miles · Freehold Subaru · Freehold, NJ · 100 mi away$34,599$3,301 less than this car

AutosXchange Intel uses current dealer-advertised asking prices, not completed sales or appraisals. It compares the same trim and condition (new or used) where at least three are listed nationwide, and adjusts the expected price for mileage; it is not adjusted for options, condition or accident history. Similar listings are searched within 50, 100 and 250 miles of the dealer first, then the dealer's state, then nationwide. The left gauge spans ±25% of the expected price. How AutosXchange price analysis works