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436 listings
- $81,410MSRP $90,560
- Exterior color: Onyx BlackOnyx Black
- Interior color: Jet Black w/Kalahari Accents leatherJet Black w/Kalahari Accents leather
- 6'10” bed, 6.6l, 8cyl
- 6 mi away
Close
Located in O'Fallon, MO / 6 miles away from O Fallon, MO
Recent Arrival!This NEW 2026 Onyx Black GMC Sierra 2500HD AAT4 Duramax 6.6L V8 Turbodiesel 10-Speed Automatic 4WD is well equipped and includes thes...
- Listing Information:
- VIN:
- 1GT4UPEY7TF340776
- Stock:
- G261055
- Listed since:
- 07-24-2026
- $90,563MSRP $99,520
- Exterior color: Sterling MetallicSterling Metallic
- Interior color: Obsidian Rush premium leatherObsidian Rush premium leather
- 6'10” bed, 6.6l, 8cyl
- 6 mi away
Close
Located in O'Fallon, MO / 6 miles away from O Fallon, MO
This NEW 2026 Sterling Metallic GMC Sierra 2500HD AT4X Duramax 6.6L V8 Turbodiesel 10-Speed Automatic 4WD is well equipped and includes these features...
- Listing Information:
- VIN:
- 1GT4UZEY5TF306928
- Stock:
- G26916
- Listed since:
- 05-29-2026
- $90,744MSRP $98,635
- Exterior color: Glacier White TricoatGlacier White Tricoat
- Interior color: Alpine Umber premium leatherAlpine Umber premium leather
- 6'10” bed, 6.6l, 8cyl
- 6 mi away
Close
Located in O'Fallon, MO / 6 miles away from O Fallon, MO
This NEW 2026 Glacier White GMC Sierra 2500HD Denali Ultimate Duramax 6.6L V8 Turbodiesel 10-Speed Automatic 4WD is well equipped and includes these f...
- Listing Information:
- VIN:
- 1GT4UXEY8TF336011
- Stock:
- G26996
- Listed since:
- 06-30-2026
- $90,744MSRP $98,635
- Exterior color: Glacier White TricoatGlacier White Tricoat
- Interior color: Alpine Umber premium leatherAlpine Umber premium leather
- 6'10” bed, 6.6l, 8cyl
- 6 mi away
Close
Located in O'Fallon, MO / 6 miles away from O Fallon, MO
This NEW 2026 Glacier White GMC Sierra 2500HD Denali Ultimate Duramax 6.6L V8 Turbodiesel 10-Speed Automatic 4WD is well equipped and includes these f...
- Listing Information:
- VIN:
- 1GT4UXEY2TF336120
- Stock:
- G26994
- Listed since:
- 06-30-2026
- Arriving Soon$80,959MSRP $90,065
- Exterior color: Summit WhiteSummit White
- Interior color: Jet Black w/Kalahari Accents leatherJet Black w/Kalahari Accents leather
- 6'10” bed, 6.6l, 8cyl
- 6 mi away
Close
Located in O'Fallon, MO / 6 miles away from O Fallon, MO
Recent Arrival!This NEW 2026 Summit White GMC Sierra 2500HD AAT4 Duramax 6.6L V8 Turbodiesel 10-Speed Automatic 4WD is well equipped and includes th...
- Listing Information:
- VIN:
- 1GT4UPEYXTF341517
- Stock:
- G261053
- Listed since:
- 07-24-2026
- Arriving Soon$90,436MSRP $98,300
- Exterior color: Onyx BlackOnyx Black
- Interior color: Alpine Umber premium leatherAlpine Umber premium leather
- 6'10” bed, 6.6l, 8cyl
- 6 mi away
Close
Located in O'Fallon, MO / 6 miles away from O Fallon, MO
Recent Arrival!This NEW 2026 Onyx Black GMC Sierra 2500HD Denali Ultimate Duramax 6.6L V8 Turbodiesel 10-Speed Automatic 4WD is well equipped and in...
- Listing Information:
- VIN:
- 1GT4UXEY6TF352630
- Stock:
- G261076
- Listed since:
- 07-29-2026
- $80,568MSRP $89,635
- Exterior color: Summit WhiteSummit White
- Interior color: Jet Black w/Kalahari Accents leatherJet Black w/Kalahari Accents leather
- 6'10” bed, 6.6l, 8cyl
- 6 mi away
Close
Located in O'Fallon, MO / 6 miles away from O Fallon, MO
This NEW 2026 Summit White GMC Sierra 2500HD AAT4 Duramax 6.6L V8 Turbodiesel 10-Speed Automatic 4WD is well equipped and includes these features and ...
- Listing Information:
- VIN:
- 1GT4UPEY5TF301345
- Stock:
- G26846
- Listed since:
- 05-16-2026
- Arriving Soon$89,662MSRP $98,530
- Exterior color: Summit WhiteSummit White
- Interior color: Obsidian Rush premium leatherObsidian Rush premium leather
- 6'10” bed, 6.6l, 8cyl
- 6 mi away
Close
Located in O'Fallon, MO / 6 miles away from O Fallon, MO
This NEW 2026 Summit White GMC Sierra 2500HD AT4X Duramax 6.6L V8 Turbodiesel 10-Speed Automatic 4WD is well equipped and includes these features and ...
- Listing Information:
- VIN:
- 1GT4UZEY1TF345340
- Stock:
- G261022
- Listed since:
- 07-14-2026
- Arriving Soon$90,988MSRP $98,900
- Exterior color: Glacier White TricoatGlacier White Tricoat
- Interior color: Alpine Umber premium leatherAlpine Umber premium leather
- 6'10” bed, 6.6l, 8cyl
- 6 mi away
Close
Located in O'Fallon, MO / 6 miles away from O Fallon, MO
Recent Arrival!This NEW 2026 Glacier White GMC Sierra 2500HD Denali Ultimate Duramax 6.6L V8 Turbodiesel 10-Speed Automatic 4WD is well equipped and...
- Listing Information:
- VIN:
- 1GT4UXEY3TF352018
- Stock:
- G261074
- Listed since:
- 07-29-2026
- Arriving Soon$90,436MSRP $98,300
- Exterior color: Sterling MetallicSterling Metallic
- Interior color: Alpine Umber premium leatherAlpine Umber premium leather
- 6'10” bed, 6.6l, 8cyl
- 6 mi away
Close
Located in O'Fallon, MO / 6 miles away from O Fallon, MO
Recent Arrival!This NEW 2026 Sterling Metallic GMC Sierra 2500HD Denali Ultimate Duramax 6.6L V8 Turbodiesel 10-Speed Automatic 4WD is well equipped...
- Listing Information:
- VIN:
- 1GT4UXEYXTF353571
- Stock:
- G261058
- Listed since:
- 07-24-2026
- New Listing$72,319MSRP $80,570
- Exterior color: Sterling MetallicSterling Metallic
- Interior color: Jet Black w/Kalahari Accents leatherJet Black w/Kalahari Accents leather
- 6'10” bed, 6.6l, 8cyl
- 6 mi away
Close
Located in O'Fallon, MO / 6 miles away from O Fallon, MO
Recent Arrival!This NEW 2026 Sterling Metallic GMC Sierra 2500HD AAT4 6.6L V8 10-Speed Automatic 4WD is well equipped and includes these features an...
- Listing Information:
- VIN:
- 1GT4UPE74TF286165
- Stock:
- G261091
- Listed since:
- 08-06-2026
- $90,192MSRP $98,035
- Exterior color: Onyx BlackOnyx Black
- Interior color: Alpine Umber premium leatherAlpine Umber premium leather
- 6'10” bed, 6.6l, 8cyl
- 6 mi away
Close
Located in O'Fallon, MO / 6 miles away from O Fallon, MO
This NEW 2026 Onyx Black GMC Sierra 2500HD Denali Ultimate Duramax 6.6L V8 Turbodiesel 10-Speed Automatic 4WD is well equipped and includes these feat...
- Listing Information:
- VIN:
- 1GT4UXEY3TF307953
- Stock:
- G26895
- Listed since:
- 05-29-2026
- $81,018MSRP $90,130
- Exterior color: Onyx BlackOnyx Black
- Interior color: Jet Black w/Kalahari Accents leatherJet Black w/Kalahari Accents leather
- 6'10” bed, 6.6l, 8cyl
- 6 mi away
Close
Located in O'Fallon, MO / 6 miles away from O Fallon, MO
This NEW 2026 Onyx Black GMC Sierra 2500HD AAT4 Duramax 6.6L V8 Turbodiesel 10-Speed Automatic 4WD is well equipped and includes these features and be...
- Listing Information:
- VIN:
- 1GT4UPEY3TF301280
- Stock:
- G26862
- Listed since:
- 05-20-2026
Showing 1 - 21 out of 436 listings
Consumer Reviews for the GMCÂ Sierra 2500HD
Read recent reviews for the GMCÂ Sierra 2500HD
Be Aware!!! Do Not Buy!!
Jim Feltes, 01/10/2024
2024 GMC Sierra 2500HD AT4 4dr Crew Cab 4WD SB (6.6L 8cyl 10A)
I bought a new 2024 2500HD AT4 on 11/15/23 - loved the truck except for the puddle of coolant it left on my garage floor. Took it to the local dealer who replaced the oil cooler - once home i discovered it was still leaking from the same place. Took it back to the dealer who had to order another oil cooler back on 12/14. I have been waiting since then with no estimated time of when … the part will arrive. I have been without a vehicle for 53 days now and GM Customer Service keeps giving me the runaround. To say the least I am disappointed in the truck but extremely disappointed with GM and in the manner in which this has been handled.
| Trim | MPG | Engine | Starting Price |
|---|---|---|---|
| 2026 GMC Sierra 2500HD AT4 4dr Crew Cab 4WD SB (6.6L 8cyl Turbodiesel 10A) | N/A | 8-cylinders (diesel) | $89,635 |
| 2026 GMC Sierra 2500HD AT4X 4dr Crew Cab 4WD SB (6.6L 8cyl Turbodiesel 10A) | N/A | 8-cylinders (diesel) | $98,530 |
| 2026 GMC Sierra 2500HD Denali Ultimate 4dr Crew Cab 4WD SB (6.6L 8cyl Turbodiesel 10A) | N/A | 8-cylinders (diesel) | $98,035 |
| 2026 GMC Sierra 2500HD AT4 4dr Crew Cab 4WD SB (6.6L 8cyl 10A) | N/A | 8-cylinders (gas) | $80,570 |
| 2026 GMC Sierra 2500HD SLE 2dr Regular Cab 4WD LB (6.6L 8cyl 10A) | N/A | 8-cylinders (gas) | $59,820 |
| 2026 GMC Sierra 2500HD SLE 4dr Double Cab 4WD SB (6.6L 8cyl 10A) | N/A | 8-cylinders (gas) | $61,970 |
More about the GMC Sierra 2500HD
Edmunds has 436 New GMC Sierra 2500HDs for sale near you, including a 2026 Sierra 2500HD SLE Pickup and a 2026 Sierra 2500HD Denali Ultimate Pickup ranging in price from $52,838 to $90,988.
How much is a new 2026 GMC Sierra 2500HD in O Fallon, MO?
- A new 2026 GMC Sierra 2500HD starts at $52,838 (including destination charge) in O Fallon, MO. Prices will go up based on the trim level you choose and any options you add. Keep in mind that prices can also vary from one state to another and even from one dealership to the next.
How much does a 2026 GMC Sierra 2500HD Crew Cab cost in O Fallon, MO?
- A new 2026 GMC Sierra 2500HD Crew Cab starts at $72,319 in O Fallon, MO. Prices will vary depending on what trim level you choose. Each state may have different pricing, so make sure you enter your correct ZIP code on Edmunds.Other versions include:
2026 GMC Sierra 2500HD Diesel which starts at $90,192.