GMC Sierra 3500HD Market — October 2026
As of October 2026, the median advertised asking price for a new GMC Sierra 3500HD is $84,801 across 6,160 U.S. dealer listings, averaging 94 days on market. Used models list at a median $66,858 across 2,400 listings. These are advertised asking prices, not completed-sale prices. CarWhere does not yet have enough verified Sierra 3500HD purchases to publish a reliable buyer-paid average — that figure appears here only from real, verified deal sheets; we never estimate it. Median asking is down 0.2% month-over-month.
New · median asking
$84,801
6,160 listings · as of October 2026
New · days on market
94 days
average across tracked listings
Used · median asking
$66,858
2,400 listings · as of October 2026
Used · days on market
73 days
average across tracked listings
Asking-price trend
Monthly snapshots of the national median asking price (new).
| Month | Median asking | Listings | Avg DOM |
|---|---|---|---|
| August 2026 | $85,550 | 6,310 | 91 |
| September 2026 | $84,961 | 6,412 | 89 |
| October 2026 | $84,801 | 6,160 | 94 |
The median is the market. Your deal is one listing.
Search live GMC Sierra 3500HD inventory near you and compare real asking prices against the national picture — then negotiate from data.
Search Sierra 3500HD listingsFrequently asked questions
How many GMC Sierra 3500HDs are for sale right now?
As of October 2026, CarWhere tracked 6,160 new and 2,400 used GMC Sierra 3500HD listings nationwide.
Is the Sierra 3500HD market moving up or down?
The new Sierra 3500HD's median asking price moved down 0.2% versus the prior month's snapshot ($84,801 as of October 2026). The trend table above shows the month-by-month history.
Are these asking prices or selling prices?
These are ADVERTISED asking prices (medians across tracked listings), not completed-sale prices. CarWhere does not yet have enough verified Sierra 3500HD purchases to publish a reliable buyer-paid average — that figure comes only from real, verified deal sheets, never estimates.
Where does this data come from?
Market figures are derived aggregates (counts, medians, averages) computed monthly from licensed live-listing data covering U.S. dealer inventory. Buyer-paid figures come exclusively from verified buyer-submitted deal sheets. The two are never mixed.
Data sources, methodology & limitations
- Snapshot date: this page reflects the October 2026 national sweep. Figures refresh with one new snapshot per month.
- Asking prices: medians and counts are derived aggregates computed from licensed live-listing data covering U.S. dealer inventory (listings deduplicated per sweep). They are advertised prices — the out-the-door number a buyer negotiates is typically different.
- Buyer-paid figures: sourced exclusively from verified buyer-submitted deal sheets, labeled with model year and shown only when the sample is large enough. Asking data and paid data are never blended. No qualifying verified Sierra 3500HD sample exists yet.
- Scope: national aggregates — local markets can sit meaningfully above or below these medians.