2021 GMC Sierra AT4

VIN 3GTP9EEL5MG370088

This 2021 GMC Sierra AT4 is listed at $35,500 with 102,667 miles in Hillsboro, OR.

GOOD DEAL $5,010 below typical price Asking $35,500 · typical market price $40,510 · based on 30 comparable same-build listings.

VehiLeaks · Vehicle History Report

The full history of this 2021 GMC Sierra AT4

VIN 3GTP9EEL5MG370088 · one-time $6, no subscription

Reported accidents & damage
Title brands — salvage, flood, lemon
Odometer readings over time
Every past listing: price, dealer, photos

Pickup 6.2L V8 4WD Gasoline

$6 one-time

Get the full report → Instant access after checkout

Market Price Range

Below market

$32,811

Typical price

$40,510

Above market

$44,548

Based on 30 comparable same-build listings.

This vehicle: $35,500 — $5,010 below the typical market price ($40,510)

Market data as of August 16, 2026

See all 2021 GMC Sierra prices — typical $40,510 →

Vehicle Decode

Body: Pickup
Engine: 6.2L · V8 · Gasoline
Drive: 4WD/4-Wheel Drive/4x4
Doors: 4
Made by: GENERAL MOTORS LLC

Look up the factory Monroney sticker by VIN →

Safety

✗ Backup camera
✗ Blind-spot monitor
✗ Lane departure
✗ ABS
✗ Electronic stability

Price history for this VIN

Asking price over time

Jun 27, 2021 · $56,505 Aug 13, 2026 · $35,500

Asking prices recorded across 9 listing dates for VIN 3GTP9EEL5MG370088, spanning 5 years 2 months.

Safety & ownership

EPA fuel economy (MPG)

City

Highway

Combined

Est. fuel cost: $1,790/year

Assumes 15,000 miles a year at $3.10/gallon and 26 MPG combined.

Model-level data for the 2021 GMC Sierra from NHTSA (recalls, NCAP crash tests) and EPA fueleconomy.gov, refreshed July 28, 2026.

Active listings

Full listing history on VehiSales →

Dealer	Location	Price	Mileage	Listed
Royal Moore Toyota	Hillsboro, OR 97123	$35,500	102,667 mi	2026-08-13
Royal Moore Mazda Buick GMC	Hillsboro, OR 97123	$36,400	102,667 mi	2026-08-11
Royal Moore GMC Buick	Hillsboro, OR 97123	$36,400	102,667 mi	2026-08-08
Royal Moore Buick GMC	Hillsboro, OR 97123	$36,900	102,667 mi	2026-08-01

Former listings

Dealer	Location	Price	Mileage	Listed
Royal Moore Mazda Buick GMC	Hillsboro, OR 97123	$36,900	102,667 mi	2026-08-04
Royal Moore Toyota	Hillsboro, OR 97123	$36,400	102,667 mi	2026-08-03
Royal Moore Buick GMC	Hillsboro, OR 97123	$37,500	102,667 mi	2026-08-01
Kendall Chevrolet GMC of Eugene	Eugene, OR 97401	$56,505	—	2021-06-27

What would this 2021 GMC Sierra AT4 cost per month?

Estimate the monthly payment on a $35,500 vehicle. Move the numbers to match your own loan.

Vehicle price

Down payment

10% down

Interest rate (APR)

7.0% is a typical rate for a well-qualified buyer — use your own quote if you have one.

Loan term

Estimated monthly payment

$633

per month

60 months · 7.0% APR · $3,550 down

Amount financed

$31,950

Total interest

$6,030

Estimate only. Excludes tax, title, registration and dealer fees, and assumes a fixed-rate loan with equal monthly payments. Your actual rate depends on your credit and lender.