Hmm. Now I'm confused.

The Trailblazer is the new body style, and had 2 engine options. Either a 4.2L I-6 or a 5.3L V-8.

The old style Blazer (S-10) came with a 4.3L V-6.

Either way, I have the service information for a Trailblazer, 4.2L I-6 ready for you.

If it is indeed a Blazer with a 4.3L V-6, the water pump procedure is very straightforward. Just like a normal, old-tech Chevy.

1990 Montero RS (In pieces... for now)

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