True only up to 2003. Thats because Cadillac designed it and didn't share it with other divisions.

The 04 Bonnville GXP has a Northstar. And it says this right on the engine cover. It doesn't make it a Pontiac engine. Its still A Cadillac engine.

 

Go to your dealer and pick up a GM High Performance Parts catalog. In there you will find engines from Chevy, Pontiac, Buick, Olds, and Cadillac. They're listed by the company that designed them, not what cars they are in.

The SBC, whether they're 1955, 265ci or 2005, LS7's are all considered Chevy's because they're based on the same 1955, 265ci. engine platform. The 4.3L has always been considered a Chevy because it's based on the same platform.

 

FWIW, my 96 Chevy Blazer has a 4.3L V6 and its definitely a Chevy.

 

In days of yore, the different GM divisions used to all have their own engines and just shared chassis/body components. In the late 70's & early 80's, GM tried to economize and reduce the money spent on all those different engines. Then some Oldsmobile buyers got all upset that their Cutlas had a "Chevy" engine in it, sued, and got all the money the GM saved by making fewer engine types (or, at least the lawyers got the money...).

But, the engines they still have typically have some badge identification. The LS1/LS2 line is considered a Chevy engine, but it's used in GTO's, and other things now. The 90 degree V6 found in all those front wheel drives is still considered a Buick engine. Without a doubt, they didn't take an Oldsmobile 350, cut off two cylinders, and come up with the 4.3l V6. Instead, they took the Oldsmobile 350, converted it to compression ignition, and made a very bad engine out of it.

The most interesting thing about this thread is how so little information can make a person so stupid...

 

In `67 `68 and `69 RPO Z28 was the 302 DZ engine.
When you ordered this option it mandated several other options with it.
4spd only HD suspension 12 bolt axle. etc.
In 1970 the Z28 became it's own model. until it was cancelled in `75 and then reintroduced in `77 and continued until `02

 

Actually '69 was the only 302 DZ.

'67s had either the 302 MO or the 302 MP if they had the factory smog (A.I.R.) pump.

'68s had the 302 MO with or without smog.

 

While were at it---the Z28 was discontinued 88-90. Although the RPO Z28 still apppeared on the.....ah..you know...the sticker with the options. Were getting pretty picky now...

 

68s only came with smog equipment.

 

70 through 74 z 28 was still an rpo on the base coupe, not its own model

 

Y'all keep adding to the confussion.
The car is a Chevrolet. The model is Camaro(F-Body). The Z-28 is a production code or upgrade to the base model, ie. RPO Z-28. Just as RPO WU8 is for the SS. It has never been it's own model.
If you look at the VIN on the car, it will tell you many things about it. Country of manufacturer, name of manufacturer, make, carline series(model), etc. What it wont tell you is if it's a Z-28 or SS or LT1, or anything else.

 

the 302 was only available in 67-69, 70's had a 350 from the factory.....