5.3 Question

[JOSH MATHIS]

I have a 2004 Chevrolet Silverado 1500 Z71 with a 5.3 Vortec V8, the engine is really messed up and is going to need replaced. What year, model, etc. 5.3 will fit in my truck???

[JOSH MATHIS]

I have a 2004 Chevrolet Silverado 1500 Z71 with a 5.3 Vortec V8, the engine is really messed up and is going to need replaced. What year, model, etc. 5.3 will fit in my truck???

[C. Charles Hahn]

Any '99-07 (Classic/GMT800) will fit. Since you're having to do an engine swap though, you might consider upgrading to a 6.0L instead....

 

You might consult the search feature for more pertinent information.

[Jennabear]

Ditto that, if you are going for a swap, might as well throw a 6.0L in there.

[Ryan00TJ]

Yep, LQ4 6.0's are dime a dozen around here it seems. More so than 5.3's it seems. Do a little searching and you might find an LQ9 HO 6.0.

[pm26]

Don't you need a beefed up transmission for the more powerful engine with more torque? Will a standard 4L60 unit handle the torque without adverse effects?

[JOSH MATHIS]

Could I put a 5.3 out of like a Trail Blazer, or a Tahoe, Or a Avalanche etc. etc.

[JOSH MATHIS]

And if I was to put a 5.3 out of like a 2001 would there have to be any computer/wiring harrness changes??

Same with the 6.0 would I have to make any modifications to make it fit, or transmission or the wiring harrness/computer??

[memarr2001]

Here are some links that I have found. Hope they help!

 

http://www.ls1truck.com/forums/lsx-truck-c...3-l92-swap.html

http://www.ls1truck.com/forums/mechanical/...ngine-swap.html

http://bertok.us/agreif/engine/EngineSwap.htm

http://www.gm-trucks.com/forums/index.php?showtopic=24279

http://www.gm-trucks.com/forums/index.php?showtopic=108504

[Eric Loll]

Could I put a 5.3 out of like a Trail Blazer, or a Tahoe, Or a Avalanche etc. etc.

 

 

trail blazer with a 5.3 a? show me one.

[xc80002]

We had one in a 03 extended.

[JOSH MATHIS]

Could I put a 5.3 out of like a Trail Blazer, or a Tahoe, Or a Avalanche etc. etc.

 

 

trail blazer with a 5.3 a? show me one.

 

 

 

My mom drives one.

[66nova]

Could I put a 5.3 out of like a Trail Blazer, or a Tahoe, Or a Avalanche etc. etc.

 

 

trail blazer with a 5.3 a? show me one.

 

 

 

Yep, since 2003 you could get the 5.3 as an option. Then in 2006 I believe you could get an SS with the 6.0.

[C. Charles Hahn]

Could I put a 5.3 out of like a Trail Blazer, or a Tahoe, Or a Avalanche etc. etc.

 

 

trail blazer with a 5.3 a? show me one.

 

 

 

Yep, since 2003 you could get the 5.3 as an option. Then in 2006 I believe you could get an SS with the 6.0.

 

 

Yup. The extended length TB and Envoy were available with the 5.3L since 2003, then in 05 the Envoy Denali had the 5.3L, in 06 the regular length TB got the 5.3L, and the TBSS came out with the 6.0L LS2.

[slemmer]

Do you care for fuel economy? You'll notice a drop in mileage for 6.0 vs a 5.3 motor.