Trailblazer engine swwp

Asked by James Aug 21, 2019 at 08:16 AM about the 2006 Chevrolet Trailblazer

Question type: Maintenance & Repair

I have a 06 trailblazer with a blown 4.2 i6
engine. I also have 91 s10 with a perfectly
fine 4.3l. my question is would the 4.3 be
compatible and how complicated would the
swap be if it is.

1 Answer
11,325

FJ4072 answered 4 years ago

Anything is possible, but I think you'll have a problem mating with the Trailblazer software. That swap would be more complicated than a v8 swap, because TB's had an option of a V8.

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