06 3.5l engine change

[AlaskaDan]

My third head fails leak down check and have misfires and P0300. Have 175,000 miles. Driving it for now with constant engine light (I do scan guage) running rough, hardly starts. Thinking of putting in a remanufactured engine. Rather change an engine than a head. Done searches and find no posts on this. Guess I'll start one.

Step One

Engine.
Auto Zone: $3,300
Tri-Star: $3,660
Replace (Canadian): $3,277

 

[rascole]

Replacing with 3.5 or 3.7?

 

[06 H3]

Auto zone has engines? Lol

 

[Best4x4]

I'd go with the 3.7L if it'll just drop in.

 

[SedonaBound]

Absolutely 3.7. You might research performance mods on the Colorado/Canyon I5 since they'd be easy before the engine goes in.

 

[deserth3]

If you have a GM dealer change it you get a 3 year 100k warenty.
Some states only let you install a engine that came in the vehicle that year. 06 it's 3.5L, 07 it's 3.7L, etc
Last spring I had a local dealer replace engine and tranny. Including about 3 weeks (not their fault) vehicle rental. It cost about $1200

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[Best4x4]

I heard you can install newer year engines in your vehicle but it can't be older due to emissions.

 

[stvnkrchnr]

Please keep us posted on this. I'll be in the same boat in a year or so with my 06. I wish I could have a 5.3 swapped in but seems intense and costly. So I'll take a 3.7 and life with it.

Kirch

 

[deserth3]

Laws are different in each state. In some cases is different between counties.
Also if you plan on moving you need to consider where you might be moving to. Some places will not let you register a modified vehicle.

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[mjferencak]

I'm doing a swap this year. Going from the 3.5, which is prone to head failure, to the 3.7. Should be a direct swap with the only modification being the computer.

 

[High Five H2]

i think someone on this forum had a 3.7L that had been bored or stroked or something to 4.0L. something to look into.

 

[SedonaBound]

Dunno which supplier you like but I saw that Autozone has a $150 off deal on engines right now.