Short Answer
Complete Explanation
NNBS is an acronym used in automotive communities to denote “New New Body Style.” It specifically applies to General Motors’ full-size pickup trucks—the Chevrolet Silverado and GMC Sierra—produced from model years 2007 to 2013. This generation, built on the GMT900 platform, followed the earlier NBS (New Body Style) GMT800 trucks (1999–2006) and preceded the K2XX generation (2014–2018). The term helps enthusiasts, buyers, and parts suppliers distinguish between the three major body style eras of GM pickups.
- Full Form:
New New Body Style - Platform:
GM GMT900 platform - Model Years:
2007–2013 for Chevrolet Silverado 1500/2500/3500 and GMC Sierra 1500/2500/3500 (HD models continued with updates until 2014 for certain variants) - Key Changes from NBS:
Revised exterior styling, improved interior quality, enhanced chassis stiffness, updated engine lineup (including the 6.2L V8), and introduction of advanced safety features such as stability control.
History / Background
General Motors introduced the GMT800 platform in 1999, which quickly became known as the NBS (New Body Style) among truck enthusiasts. By the mid-2000s, competition from Ford’s redesigned F-150 and Dodge’s Ram prompted GM to develop a successor. The GMT900 platform debuted in late 2006 for the 2007 model year. Because the GMT800 was already called NBS, the new generation was informally dubbed NNBS (New New Body Style) in online forums and aftermarket communities. The term was never officially used by General Motors but became a widely recognized shorthand for identifying parts, compatibility, and vehicle generations. The NNBS generation saw several mid-cycle improvements, including the addition of the 6.2L V8 in 2009 and a refreshed interior in 2010.
Importance and Impact
The NNBS generation marked a significant step in GM’s full-size truck evolution. It introduced a stronger hydroformed frame, coil‑over‑shock front suspension (on 1500 models), and improved fuel economy through six‑speed automatic transmissions. These trucks also offered the first factory‑available touchscreen infotainment systems. The NNBS designation remains crucial in the used‑truck market: potential buyers often search specifically for NNBS trucks due to their balance of modern features and relative affordability compared to newer models. For the aftermarket industry, the NNBS generation has a dedicated parts catalog, from suspension kits to engine upgrades.
Why It Matters
For anyone buying, selling, or modifying a 2007–2013 Chevrolet Silverado or GMC Sierra, understanding the NNBS label is essential. It affects compatibility of replacement parts, performance upgrades, and resale valuation. Knowing whether a truck is NNBS or NBS prevents ordering incorrect components and helps identify generation‑specific issues (e.g., AFM/Displacement on Demand problems common in early NNBS trucks). The term also appears in online listings, forum advice, and parts descriptions, so familiarity with it simplifies research and communication.
Common Misconceptions
NNBS stands for “New New Body Style” and is an official GM designation.
It is an acronym created by the automotive enthusiast community; General Motors never used it in official marketing or vehicle documentation.
All GMT900 trucks are NNBS.
While GMT900 is the platform code, the term NNBS specifically refers to the body style of the 2007–2013 Chevrolet Silverado and GMC Sierra (1500/2500/3500). Other GMT900‑based vehicles, such as the Chevrolet Avalanche, Suburban, or Cadillac Escalade, are not typically called NNBS.
NNBS and NBS trucks use the same parts.
Many components—including body panels, interior trim, suspension geometry, and engine mounts—differ between the two generations. Using NBS parts on an NNBS truck often requires modifications or may not fit at all.
FAQ
What does NNBS stand for?
NNBS stands for "New New Body Style." It is a non‑official term used by truck enthusiasts to describe the second generation of GM's GMT900 platform full‑size pickups (Chevrolet Silverado and GMC Sierra) from model years 2007–2013.
Which years are considered NNBS?
For Chevrolet Silverado and GMC Sierra 1500 models, the NNBS generation covers 2007 through 2013. HD models (2500/3500) continued with the same body style until early 2014 before transitioning to the next generation.
What are the key differences between NBS and NNBS?
Key differences include exterior styling (more angular front end), improved interior materials, a stronger hydroformed frame, coil‑over‑front suspension on 1500 models, introduction of six‑speed automatic transmissions, and optional 6.2L V8 engine. Many body panels and interior parts are not interchangeable between the two generations.
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