GMC Sierra 1500
GMC Sierra 1500 is GMC's half-ton full-size pickup, and it's been the brand's best-known truck since the Sierra name took over in 1988. It shares its frame and engines with the Chevrolet Silverado 1500, but GMC gives it its own styling, nicer cabins and trims like Elevation, AT4, AT4X and Denali. The all-new 2027 truck just arrived with new 5.7- and 6.6-liter V8s and a 10-speed automatic on every engine. Pick your year below to jump to the right generation, or read on for the history and which one suits you.
GMC Sierra 1500 at a Glance
Sierra name since 1988 Earlier a trim name on GMC C/K trucks
Generations 6 GMT400 to the 2027 redesign
Current engines 4 2.7 turbo, 5.7 V8, 6.6 V8, 3.0 diesel
Current power 305–481 hp 3.0 Duramax to 6.6 V8
Max towing 13,500 lb 2027 with the 5.7 V8 and Max Trailering
Twin Chevy Silverado 1500 Same chassis, GMC styling and trims
GMC Sierra 1500 Generations
Years shown are US model years. Some years overlap because GMC kept building the old truck for a while after each redesign: the 2007 Sierra Classic (GMT800), the 2019 Sierra 1500 Limited (K2XX) and the 2022 Sierra Limited (pre-refresh T1XX). Codes are the GM platform names owners use. GM hasn't published a code for the 2027 truck, so we use T1-2, the name GM Authority uses for this updated T1 platform. Pick a card to open its full guide.
1988–1998
GMT400 (OBS)
GMT40011 model years
The first truck sold as the Sierra, with flush styling and independent front suspension on 4x4s. Vortec engines arrived for 1996.
Guide coming soon
1999–2007
GMT800
GMT8009 model years
Brought the Vortec 4.8, 5.3 and 6.0 V8s, then the first Sierra Denali with Quadrasteer. Sold as the Sierra Classic for 2007.
Guide coming soon
2007–2013
GMT900
GMT9007 model years
Sharper styling and a far better cabin. The Denali got a 403-hp 6.2 V8, and a two-mode Sierra Hybrid ran from 2009 to 2013.
Guide coming soon
2014–2018
K2XX
K2XX5 model years
EcoTec3 V6 and V8 engines with cylinder deactivation, a 420-hp 6.2 and an 8-speed automatic. Sold as the Sierra Limited for 2019.
Guide coming soon
2019–2026
T1XX
T1XX8 model years
Added the MultiPro tailgate, AT4, a 2.7 turbo four and the 3.0 Duramax. The 2022 refresh brought AT4X, Denali Ultimate and Super Cruise.
Read the T1XX guide →
2027–present
2027 redesign
T1-20 model years
Today's Sierra 1500, with new 5.7 and 6.6 V8s, a 350-hp TurboMax, a 10-speed on every engine and a 16.3-inch screen.
Read the T1-2 guide →
GMC Sierra 1500 History
The Sierra 1500 went from a trim name on a work truck to a pickup that tops out near $90,000. Here are the moments that shaped it.
- 1970s Sierra shows up as a trim name on GMC's C/K pickups, alongside Sierra Grande, High Sierra and Sierra Classic.
- 1988 The GMT400 trucks arrive, and Sierra becomes the name of GMC's full-size pickup, while the C/K name stays with Chevrolet.
- 1996 Vortec engines arrive, including a 255-hp, 330 lb-ft 5.7-liter V8, and a third door becomes available on extended cabs.
- 1999 The GMT800 Sierra 1500 launches with Vortec 4.8, 5.3 and 6.0 V8s. The 5.3 makes 270 hp and 315 lb-ft at launch.
- 2002 The first Sierra Denali pickup arrives, with Quadrasteer four-wheel steering standard through 2004.
- 2007 The GMT900 launches, and the Sierra Denali gets a 403-hp, 417 lb-ft 6.2-liter V8 with a six-speed automatic.
- 2009 The two-mode Sierra Hybrid goes on sale in Crew Cab form, pairing a 6.0 V8 with two electric motors. It runs through 2013.
- 2014 The K2XX launches with aluminum-block EcoTec3 engines and cylinder deactivation: a 285-hp 4.3 V6, 355-hp 5.3 V8 and 420-hp 6.2 V8.
- 2019 The T1XX debuts with the six-way MultiPro tailgate, the first AT4, a 2.7-liter turbo four and a 10-speed automatic. A carbon-fiber CarbonPro bed follows midyear.
- 2020 The 3.0-liter Duramax inline-six diesel joins the lineup with 277 hp and 460 lb-ft.
- 2022 A big refresh brings a new cabin with a 13.4-inch screen, Super Cruise with trailering, the AT4X and the Denali Ultimate.
- 2026 GMC reveals the next-generation 2027 Sierra 1500 in June, and production starts at Silao, Mexico, in October.
Which Sierra 1500 Generation Is Right for You?
The right Sierra 1500 depends on your budget, how much you tow and how much tech you want. Here's how the generations line up for most buyers.
| Generation | Years | Best for |
|---|---|---|
| GMT400 | 1988–1998 | Classic-truck fans; simple to fix, but very old safety tech |
| GMT800 | 1999–2007 | Budget work trucks; the 5.3 V8 is the common, tough choice |
| GMT900 | 2007–2013 | Cheap V8 hauler with a much better cabin than the GMT800 |
| K2XX | 2014–2018 | Value buy with more power; check for lifter and 8-speed issues |
| T1XX | 2019–2026 | Best used pick; 2022-and-up trucks have the better cabin and 5-star NHTSA rating |
| T1-2 | 2027–present | Newest tech and engines, but it's a first-year design |
Our take: for most used buyers, a 2022–2026 T1XX with the 5.3 V8 or the 3.0 Duramax is the sweet spot. If you're shopping a 2021–2024 truck with the 6.2 V8, make sure the engine recall has been done.
Sierra 1500 Owners Community
Sierra 1500 owners talk towing setups, AT4 and AT4X builds, engine recalls and keeping high-mileage trucks running. Share your truck, ask questions and swap tips with other owners.
- 6.2 V8 recall and engine replacements
- 5.3 vs 6.2 vs 3.0 Duramax
- AT4 and AT4X off-road builds
- Leveling kits, wheels and tires
- Towing setups and trailer cameras
- Super Cruise real-world experiences
- Real-world fuel economy
- GMT400 and GMT800 restorations
GMC Sierra 1500 FAQ
What years is each GMC Sierra 1500 generation?
In the US: GMT400 1988–1998, GMT800 1999–2006 (plus the 2007 Sierra Classic), GMT900 2007–2013, K2XX 2014–2018 (plus the 2019 Sierra Limited), T1XX 2019–2026 and the redesigned truck from 2027 on.
Is the GMC Sierra 1500 the same as the Chevy Silverado 1500?
Mechanically, mostly yes. They share the frame, engines and transmissions. However, GMC uses its own sheet metal and interiors and sells trims like Elevation, AT4, AT4X and Denali instead of Chevy's names.
What's the difference between the Sierra 1500 and the Sierra HD?
The 1500 is the half-ton truck most people buy for daily driving and moderate towing. The Sierra HD 2500HD and 3500HD use a heavier frame and bigger engines and are rated to tow much more.
What's new on the 2027 Sierra 1500?
It's a full redesign with new 5.7- and 6.6-liter V8s, a 350-hp TurboMax four-cylinder, a 10-speed automatic on every engine and a 16.3-inch center screen. Elevation now replaces the old SLE and SLT trims.
How much can a GMC Sierra 1500 tow?
GMC rates the 2027 Sierra 1500 up to 13,500 lb with the 5.7 V8 and the Max Trailering package. The diesel is rated up to 12,100 lb, while the 6.6 V8 and the 2.7 turbo top out around 9,400 and 9,200 lb. Your truck's exact rating is on its door-jamb label and in GMC's towing guide.
Which Sierra 1500 has the 6.2 V8 engine recall?
NHTSA recall 25V274 covers 2021–2024 trucks with the 6.2-liter L87 V8 built between March 2021 and May 2024. NHTSA opened a follow-up investigation in August 2026 into whether the fix is enough, so check the VIN and ask for the repair paperwork.
Keep Exploring
Explore GMC's full lineup and the heavy-duty Sierra, or see how Ford and Ram half-tons stack up against the Sierra 1500.
Photo credits
- Header image: Mr.choppers, CC BY-SA 3.0, cropped and resized.
- Refreshed GMC Sierra 1500 Denali (T1XX) in…: OWS Photography, CC BY 4.0, cropped and resized.
- 2017 GMC Sierra 1500 Crew Cab (K2XX)…: Bull-Doser, Public domain, cropped and resized.
- 2008 GMC Sierra 1500 Denali (GMT900) in…: HJUdall, CC0, cropped and resized.
- 2003-2006 GMC Sierra 1500 extended cab (GMT800)…: Bull-Doser, Public domain, cropped and resized.
- 1990 GMC Sierra K-1500 SLE Sportside (GMT400)…: MercurySable99, CC BY-SA 4.0, cropped and resized.