In 2012 they were able to massage another 4 hp out of this V-6 engine to boost the horsepower to 308 making it the most powerful standard engine in a crossover. Considering the 6.6 L 400 cubic inch engine in my Pontiac T/A produced about 275 hp at double the weight you can’t help but be impressed with General Motors version of this all aluminum V-6 engine.
Engine belt diagram GM V-6 3.6 L
Although the belt diagram was taken from my Cadillac owner’s manual, the routing is the same on other vehicles that General Motors installed this option into. And there is quite a healthy list of vehicles that use this engine as a standard equipment options. Including the now departed Pontiac and Saturn line of automobiles.
Although this same design engine had been around as a 2.8 L for many years it became a 3.6 L in 2004 when it was installed in a Cadillac CTS as the standard equipment engine. Back then it was only in the 260 hp range. When they added variable valve timing and direct injection they were easily able to push this horsepower well above 300 horses.
The power and weight ratio of this engine is truly a design marvel. The block of the 3.6L is said to be thick enough to be punched out to a maximum of 4.0 L. This would allow room for evolution of this platform that someday may be the largest GM engine offered?
Don’t quote me on this but I heard that the 3.6 engine is in the all-time top 10 engines list as far as horsepower to weight ratio along with many other criteria such as longevity and serviceability. So I posted this engine belt diagram for the GM V-6 3.6 L engine because if you own one of these motors you will probably have to install several serpentine belts on it before it goes to the junk yard.
If you’re looking for another popular General Motors of V-6 engine I have the 4.3 L Chevy V6 belt diagram also available here. And for a list of all of my posted belt diagrams you can head back to the main page for engine belt diagrams. Or return to the homepage for the online auto repair blog.