2002 trailblazer 4.2 engine swap

jigfeett

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Joined
May 30, 2008
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#1
Make
chevrolet
Model
Trailblazer LTZ
Year
2002
Miles
200K+
Engine
4.2
I'm looking to get a replacement 4.2 engine for a 2002 Chevrolet trailblazer and need to know what years will be direct fit. I know some changes were made through the years and have all the original accessories to bolt on to the replacement engine.
Current situation coolant is dropping but not going on the ground and CAT efficiency codes.
 

GM Guy

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#2
You need to find the 9th digit in the vehicle's vin# to determine that. Use Google, if necessary.
 

jigfeett

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May 30, 2008
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#4
Well the trans went out "Shell" probably.
Went to JY and got a 2003 which by the way fits the same there is a difference in the bell housing bottom side, but nothing mechanical to worry about. on the 02 the bottom has 2 holes that have big rubber plugs and the 03 has a slot with larger holes at the ends and a one piece rubber stopper, everything else is the same.
engine still runs so we are going to run it till it dies then get a replacement.