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Gary, Chevy Technician
Category: Chevy
Satisfied Customers: 16760
Experience:  15 years GM master tech
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I need to know if I can and what would I need to put a 2013

Customer Question

I need to know if I can and what would I need to put a 2013 4.3l vin x in my 2001 blazer 4.3l vin w
Submitted: 1 year ago.
Category: Chevy
Expert:  Gary replied 1 year ago.

I am sorry for the long wait

yes the 2013 X engine would fit and connect to the 2001 transmission and into the 2001 blazer

you will need to use the complete engine wiring harness and computer from the 2013 engine to run the 2013 engine in the 2001 blazer

with a swap over like this you may need to have the 2013 computer programmed by a tuner to eliminate it from looking for the theft signal from the BCM so the 2013 computer will not go into theft lock and allow fuel to the fuel injectors

do you have the complete 2013 donor truck to pull parts from ?

Expert:  Gary replied 1 year ago.

if you have any questions please ask

dont forget to rate us here at Justanswer as i do not get credit for my work until you rate us here

Customer: replied 1 year ago.
Ok I found a 4.3 l motor and tranny with wiring harness from a 2003 S10 blazer vin X
would this work in my 2001 S10 Blazer vin W?
Expert:  Gary replied 1 year ago.

yes as long as you use the wiring harness from the X 4.3 engine and computer from the X engine

Customer: replied 1 year ago.
Can you explain more of why
They are the exact same motor when you look at them side by side
Expert:  Gary replied 1 year ago.

the X engine is sequential injection v/s the W engine is multi port injection and the inputs and fuel control is totally different between the 2

Customer: replied 1 year ago.
Ok so why do these use the same plenum and the same spider fuel injectors
Expert:  Gary replied 1 year ago.

they are controlled differently the computers are different

you said you have a 2003 engine and tranny with wiring just get the computer that came with the wiring and it will work fine in this 2001 truck

Customer: replied 1 year ago.
the computer is the ecm
If I can't get the computer from that car, can I order one for that engine?
Which motor is better and has more power?
Expert:  Gary replied 1 year ago.

the X had a little bit more power especially on the bottom end and yes you can pick up an ECM from any Napa or Pep Boys for this X engine it is just the programming that needs to be installed in it they need the VIN number from the truck the 2003 engine came out of to program it correctly for you

Customer: replied 1 year ago.
do I need the whole wiring harness from the x engine
Expert:  Gary replied 1 year ago.


Customer: replied 1 year ago.
say I wanted to put a 4.8L V8 in the blazer
I would need the wiring harness and the computer from that vehicle?
Expert:  Gary replied 1 year ago.

yes but the 4.8 would not be a quick swap out usually buying a v8 conversion kit that will come with the correct motor mounts to use make the V8 fit in the truck or be prepared to be custom making some brackets and parts to make the fit

Customer: replied 1 year ago.
Ok do you have any good suggestions on how to make the 4.3L motor faster/H.P.
Expert:  Gary replied 1 year ago.

the cheapest way is to pick up a 4.3 already built up from GM performance or a local racing engine shop

or bring them your old engine and have them build it up for you