The G6 did offer a V6 engine, but not on every version. Base models used a four-cylinder, while the V6 was available on higher trims.
The Pontiac G6 was produced by General Motors from 2005 to 2009 in several body styles, including sedans and coupes. Engine availability varied by year and trim, with the 3.5-liter V6 commonly paired with mid- to upper-level trims to provide more power. This article breaks down the engine options and explains how to verify which engine is in a specific car.
Engine options by trim and year
Below is a concise breakdown of the engines that appeared most commonly across G6 trims.
- 2.4-liter inline-4 engine (Ecotec) — used on base and value-oriented trims.
- 3.5-liter V6 engine — optional on mid- to higher-trim models (e.g., GT).
These two engines cover the vast majority of Pontiac G6 configurations you’re likely to encounter. If you want V6 power, you’ll typically be looking at a GT or equivalent higher trim from the mid- to late-production years.
How to verify which engine your G6 has
To determine the exact engine in a particular Pontiac G6, use these steps:
- Check the Vehicle Identification Number (VIN) on the dashboard or door jamb; option codes can indicate the engine family.
- Inspect the engine bay for a stamped engine code or badge on the valve cover that identifies the engine type.
- Refer to the owner's manual or the original window sticker for the factory-installed engine specification.
- If needed, contact a GM dealer or use a reputable VIN-decoder service with the VIN to confirm the engine.
- For a quick visual check, note that a V6 will have three exhaust outlets on most variants of the G6 (compared with a four-cylinder’s typically simpler exhaust setup), though the definitive method is VIN/engine code.
Knowing the exact engine helps with maintenance, parts compatibility, and fuel economy expectations.
Summary
The Pontiac G6 did include a V6 option, primarily the 3.5-liter V6 on mid- to higher-trim models, while the base configurations used a 2.4-liter four-cylinder. Engine availability varied by year and trim, so checking the VIN or original paperwork is the best way to confirm which engine a specific G6 has. The model was produced from 2005 through 2009, after which GM phased out Pontiac.
How much horsepower does a 2007 Pontiac G6 3.5 L V6 have?
224 hp
The 2007 G6 saw more engine changes, and standard side torso and side curtain airbags (actually introduced late in the 2006 model year) were new. The GT now featured VVT on its 3.5 L V6, raising power from 200 hp to 224 hp.
Does the Pontiac G6 have a V6 engine?
"Chances are, most used Pontiac G6 models you see for sale will have the midlevel 3.5-liter V6," reports Edmunds.
What is the most common problem with the Pontiac G6?
Top Pontiac G6 Problems
- Problems With Electric Power Steering System May Require Steering Column Replacement.
- Pontiac G6 low beam headlights repeatedly fail due to melted wiring harness and connector issues.
- Poor Terminal Contact at BCM Connectors May Cause Electrical Issues.
- Check Engine Light Due to Gas Cap Issue.
Is a 2009 Pontiac G6 a V6?
The GXP model relies on a standard 3.6-liter V6 that makes 252 horsepower and 251 pound-feet of torque. A four-speed automatic transmission is standard for the four-cylinder engine, the 3.5-liter V6 and the 3.9-liter V6. A six-speed automatic is optional for the four-cylinder engine and standard with the 3.6-liter V6.