* Firebird (and Trans Am): The Firebird, especially its performance-oriented Trans Am sibling, is arguably Pontiac's most iconic and enduringly popular model. The "Bandit" Trans Am from the movie *Smokey and the Bandit* cemented its place in pop culture.
* GTO: The original GTO (introduced in 1964) is legendary for its performance and affordability, establishing the "muscle car" archetype. Later iterations, though not always as successful, kept the GTO name alive.
* Grand Prix: The Grand Prix was a long-running model known for its sporty styling and relatively luxurious features. Various generations enjoyed significant sales success.
* Bonneville: A full-size car, the Bonneville represented Pontiac's more upscale offerings for many years. Its popularity was consistent, though it faced competition from other full-size offerings.
* Sunbird/Sunfire: These compact cars provided a more affordable entry point to the Pontiac brand and enjoyed considerable sales success for several years.
It's difficult to definitively say *which* was the single most popular, as sales figures fluctuate by year and generation. However, the Firebird/Trans Am, GTO, and Grand Prix consistently rank among the most recognized and beloved Pontiac models.
