2021 GMC Sierra 1500 AT4
View this vehicle at fountain autoplex →Vehicle Details
Federal records · buyer verification
2021 GMC SIERRA 1500
A component is listed below if NHTSA records a vehicle recall campaign, a manufacturer warranty extension or service campaign, or at least 10 distinct consumer complaints.
Recall campaigns
NHTSA lists these campaigns as covering certain 2021 GMC SIERRA 1500 vehicles. One campaign can list several components, so these do not sum to the 7 vehicle campaigns on record.
- Engine1 campaign345 distinct complaints
- Power Train2 campaigns134 distinct complaints
- Seat Belts2 campaignsno complaint count above OAV’s minimum of 10
- Tires2 campaignsno complaint count above OAV’s minimum of 10
Manufacturer campaigns
The manufacturer filed these with NHTSA as warranty extensions or service campaigns.
- Electrical SystemWarranty extensionmost recently Tue Jan 27 2026 00:00:00 GMT+0000 (Coordinated Universal Time)
A warranty extension does not establish that this vehicle is covered, or that coverage is unexpired. Coverage depends on the program, the VIN, and its date of first sale — confirm with a franchised dealer.
Federal law requires the manufacturer to remedy a safety recall at no cost to the owner — by repair, replacement or refund — for vehicles not more than 15 years old on the date the defect was determined.
Parts are sometimes on back-order and some remedies are interim, so a dealer may not be able to complete the work immediately. A specific vehicle’s current recall status is available through NHTSA’s VIN recall lookup.
GMC filed 1,432 other service communications for this model year, nearly all routine repair instructions. OAV lists only warranty extensions and service campaigns; routine bulletins are not listed.
These records describe the 2021 model-year, not any individual vehicle, and are not an inspection. One complaint can be recorded against more than one component, so counts do not sum to the model-year total. Service records for any component listed here are worth requesting from the seller. Showing 5 of 8 components with records above OAV’s publication floor — see all 8 for this model-year.
Complaints are unverified consumer reports submitted to NHTSA. Mileage is self-reported and frequently rounded. Complaint records as of 2026-09-18. Recall records as of 2026-09-18. Manufacturer communications as of 2026-09-18.
AT4
Harrisonville, MO 64701
Is this 2021 GMC Sierra 1500 AT4 a good deal?
OAV verdict: Unscored
Why: Listed at $33,449. This vehicle has higher mileage than is typical for its age, so its lower price isn't enough on its own to establish a like-for-like market discount — OAV withholds a verdict rather than call it a deal. Listed 65 days.
Market price position
This vehicle has higher mileage than is typical for its age, so its lower price isn't enough on its own to establish a like-for-like market discount — OAV withholds a verdict rather than call it a deal.
Fountain Autoplex
Harrisonville, MO
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Request availability and out-the-door price
OAV will route your inquiry to Fountain Autoplex for current availability of this 2021 GMC Sierra 1500 AT4 and an out-the-door price quote (taxes, fees, addons included).
OAV routes your inquiry; pricing, taxes, fees, and availability come from the dealer.
About This 2021 GMC Sierra 1500
Listing updated: Sep 17, 2026Listed by an independent dealer in Harrisonville, MO · On lot for 65 days · VIN verifiable at NHTSA
This used 2021 GMC Sierra 1500 AT4 is listed at $33,449 by fountain autoplex in Harrisonville, MO 64701. It has 100,046 miles on the odometer (dealer-reported, not independently verified by OAV). The exterior color is White. It features a 4WD drivetrain with a 5.3L V8 engine and Automatic transmission.
OAV's independent, evidence-backed Price-to-Market analysis rates this vehicle as Unscored. This vehicle has higher mileage than is typical for its age, so its lower price isn't enough on its own to establish a like-for-like market discount — OAV withholds a verdict rather than call it a deal.
This vehicle has been on the lot for 65 days.
Analysis powered by OAV's patented inventory standardization technology (U.S. Patent No. 12,236,477). Verdict methodology ptm-verdict-v1 · snapshot Sep 17, 2026. The patented comparable band is the input; ptm-verdict-v1 is the versioned OAV rule set that turns it into this verdict.
Market context
This listing is part of OAV's broader Harrisonville, MO trucks market analysis. OAV compares vehicles by local and regional price-to-market ranges and comparable count; days-on-lot and demand signals are shown separately, not as verdict inputs.
How this deal is rated
OAV compares this 2021 GMC Sierra 1500 against similar vehicles currently available for sale — same make, model, and year range, using trim where the data supports it. OAV does not adjust comparable prices for mileage; on used vehicles it withholds a verdict when mileage would distort the comparison — very high or unreliable mileage, or a lower price better explained by higher-than-typical mileage than by a genuine market discount — rather than overstate a deal. Based on where this listing falls in that comparable set, it is rated:
- Great Deal — priced below the comparable-range floor by a meaningful margin (OAV's minimum-gap rule); a listing below the floor by less than that margin is Fair Price.
- Fair Price — priced within the expected range for comparable vehicles.
- Overpriced — priced above the typical range for comparable vehicles.
Listings show OAV's PTM-derived deal quality and live market context. OAV-claimed dealers manage their listing profile and route buyer inquiries directly. Paid OAV partners can surface additional verification signals, but commercial participation never changes a listing's Price-to-Market verdict, eligibility, ranking, or confidence.
How this listing is verified
This vehicle listing was aggregated from an independent dealer in Harrisonville, MO, one of 57,000+ U.S. dealerships in OAV's nationwide inventory network.The VIN 1GTP9EED8MZ198020 can be independently verified via the U.S. Department of Transportation's NHTSA VIN decoder, and safety recalls at NHTSA's recall database.
Vehicle attributes (year, make, model, trim, mileage, location) are standardized using OAV's patented methodology (U.S. Patent No. 12,236,477), which normalizes naming conventions and deduplicates cross-listed inventory across the dealership network. Listing data is processed daily; Price-to-Market analysis uses comparable vehicles.
2021 GMC Sierra 1500 Market in MO
MO Market Listings
317
Average Price
—
Price Range
—
Avg Days on Lot
87
Based on all 317 2019-2023 GMC Sierra 1500 listings in the MO market. Because OAV has not assigned a reliable price verdict to this listing, it does not state how it compares to this broader average. Similar vehicles spend an average of 87 days on dealer lots in this market.
Similar GMC Sierra 1500 Listings in MO
8 similar listings shown (closest matches within ±2 model years) and ±30,000 miles (subject trim: AT4 — compare trims below)
This is a broad, statewide same-model set (any trim, mileage, or title) — not the qualified comparable cohort behind the verdict above; lower prices here typically reflect a different trim, higher mileage, or a branded title.
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