I am considering putting the 5.7L LS1 into a 2002 Trailblazer 4WD, 6cyl SUV. Has anyone done this or heard of one? I know the extended newer versions come with the 4.8 V8, so I am hoping I can bolt it in with minimal problems. Thanks for any input!!!

 

yeah the ext version comes with both the 4.8 and 5.3 so I am almost positive it would work. Just have to change a little wiring and the computer.

Remington

 

that would be cool to do with the short version.
Im going to be getting one next year for the girlfriend. now i just need to convincer her that i need to swap in a 5.7 or 382

 

Yeah that would be a nice little sleeper.

 

i have an 02 trailblazer, and have been working to achieve that. Im still debating on gettin a 5.3 from trailblazer ext or wait till the following year when the trailblazer ss will be out with 6.0

 

What about a twin turbo kit on the stock engine. I thought I remeber reading about gm testing a setup on the engine before the trailblazer was realeased.

 

Does anyone know if the transmission bolt pattern on the 6 cylinder is the same as the v8? I too have a 2002 Trailblazer.

Andrew

 

The transmission bolt pattern is different between the I6 and the V8.
We've actually had a couple of the Trailblazer I6's in here to make wiring harnesses for; here's what the tranny end looks like:



BUT, since the newer 4L60E's are a 2 piece case, you could probable leave the trans in place and just unbolt the I6 bellhousing and swap in the V8 bellhousing.

I've got an 04 GMC Envoy extended with the V8 and really like it. If you find a wrecked one of these with the V8, I would recommened buying it, as the 5.3 V8's used in all of these (no 4.8 available) are the aluminum block LM4 instead of the iron block LM7 used in other trucks!!

Also if any special brackets are needed to put the V8 in the short version, the Buick Ranier would be the place to get them. It is the only short version that had the 5.3 available as an option.

The all aluminum 5.3 (LM4) comes in:

03-04 Chevy Trailblazer extended
03-04 GMC Envoy extended
04 Buick Ranier
04 Chevy SSR

 

as of right now theres no hope for the I6. All u can get engine wise is cai and cat-back. The twin turbo setup, was just gm testin ght limits of the I6 and will never be offered. Whipple backed out b/c they coulndt tuen the I6 pcm correctly. Hooker made some headers, but then canceled the whole order, for gods knows why. And there u have it nothin...

 

gm did the tt trailblazer, but it wasnt the motor we have, meaning it was all forged and lower compression, so you cant just toss turbos on our trailblazers. Im so down with doing a v8 swap, wouldnt be the first six cylinder to eight cylinder swap ive done haha.

 

How about swapping in an LS2 from the new SSR. Hmmm...maybe even the T56...

Andrew

 

Oh gotcha. I remember hearing about them testing the TT, too bad they never did anything with the testing, new ty or syclone would be way better than the ssr.

 

I know this is an old thread, but the information I need is relevent.

I'm looking at a 4L60e tranny from a 6 cylinder trailblazer to bolt behind the 5.3 in my 76 camaro.

I have a V8 bellhousing I can swap out, but my question is:

The torque converter will need to be swapped too correct? I can't use the 6 cyl torque converter in a V8 bellhousing attached to the V8?

 

I don't know the exact answer to your question, but I can tell you that there was something specifically different about the 2002 Trailblazer transmissions. In the Holinger exchange catalog they are listed as one year only. They also aren't very durable. My first trans failed at 75K miles. I had it rebuilt by a supposedly good rebuilder and the second failed at 110K miles. I then got a low mileage used trans (thats how I know about the one year only deal) and that transmission is still going (130K on it now). My point is that make sure its compatible and that it is low miles.

Andrew