GOOSENECK/5TH WHEEL PACKAGE
Z6A1,367 live listings
Median Towing Goose Score 76
Rating with this package: 21,300 lb gooseneck / 5th-wheel
2026 GMC Sierra 3500HD Towing Capacity
1,367 of 2,102 live listings carry the Z6A GOOSENECK/5TH WHEEL PACKAGE, read from the window sticker or OEM code. Updated hourly.
Our catalog rates every 2026 Sierra 3500HD trim at 20,000 lb conventional with the Duramax diesel, from the Pro to the Denali Ultimate; axle ratios show a dash where the catalog value isn't confirmed against an OEM source. For gooseneck and 5th-wheel trailers, Z6A, the gooseneck / 5th-wheel package, is rated 21,300 lb, and NHT, the Max Trailering Package listed for the Pro, 36,000 lb. The gap between those two codes is large, so check which one a truck's window sticker actually shows.
Live listings with tow equipment
Counted only when the package shows on the truck's window sticker or in its OEM option codes, not in dealer text.
Top Towing scores among them
Why this score?
Tow rating by trim
| Trim | Engine | Drive | Axle | Conventional (lb) | Gooseneck (lb) |
|---|---|---|---|---|---|
| AT4 | 6.6L Duramax Diesel | 4WD | — | 20,000 | — |
| Denali | 6.6L Duramax Diesel | 4WD | — | 20,000 | — |
| Denali Ultimate | 6.6L Duramax Diesel | 4WD | — | 20,000 | — |
| Pro | 6.6L Duramax Diesel | 4WD | — | 20,000 | — |
| SLE | 6.6L Duramax Diesel | 4WD | — | 20,000 | — |
| SLT | 6.6L Duramax Diesel | 4WD | — | 20,000 | — |
One catalog configuration per trim. Each trim comes in several engine, axle, cab and bed combinations with different ratings; a truck's own window sticker has its exact ones. A dash means the figure isn’t in our catalog or isn’t confirmed against an OEM source.
Factory tow packages
Verified packages with an OEM order code and what they change for towing. A rating is shown only where every verified source for that code agrees.
GOOSENECK/5TH WHEEL PACKAGE
Z6ATrims not listed in our catalog
- Gooseneck / 5th-wheel rating with the package: 21,300 lb
- 5th-wheel / gooseneck prep
1,367 live listings carry it.
Max Trailering Package
NHTOn: Pro
- Gooseneck / 5th-wheel rating with the package: 36,000 lb
- Max-tow equipment
- 5th-wheel / gooseneck prep
No live listing shows it on the sticker right now.
Gooseneck and 5th-wheel
- Z6A GOOSENECK/5TH WHEEL PACKAGE — 21,300 lb gooseneck / 5th-wheel rating with the package; on 1,367 live listings.
- NHT Max Trailering Package — 36,000 lb gooseneck / 5th-wheel rating with the package.
Tow ratings are catalog figures checked against OEM towing guides and order guides; a truck's window sticker is the final word. How Goose scores trucks