v6 4.2 Envoy conversion to a diesel - Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum



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2013+ Chevrolet Trailblazer Forum Discussion on the new upcoming 2013 Chevy Trailblazer

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  #1  
Old 08-20-2013, 11:34 PM
BlueEnvoy2013 BlueEnvoy2013 is offline
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2003 GMC Envoy SLE
Imperial Blue Metallic 4.2L I6 4X4
Join Date: Aug 2013
Location: Wisconsin
Posts: 1
v6 4.2 Envoy conversion to a diesel

So I've been thinking a lot the past few months and been doing my homework on this idea, got the money to do it but I wanna know what others think about it as well and maybe get some other ideas. The stock 4.2 liter v6 that comes in the 03 envoys is so sluggish, doesn't have much power at all, I mean it can't even do a power brake, wheels won't break loose unless the road is wet. I love the suv...just wish it had more power and I've always wanted to build a sleeper/unique ride that would wow someone at the stop light next to me when I launch it.

I've had my eyes set on the 6.5L liter turbo diesel engine with a auto transmission. Yeah I know the rear-end will have to be changed, might have to do some modifications under the hood to make it fit and so on and ect.

I know some will say why don't you just buy a truck...if I wanted to that I wouldn't be here and I love this ride.

So I wanna know what do you all think? Honestly

Sorry posted in the wrong area, if it can be moved to the 2002 - 2009 TrailBlazer/Envoy Tech be great thanks
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  #2  
Old 08-21-2013, 12:38 AM
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skippo18 skippo18 is offline
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2003 Chevy TrailBlazer LS
Midnight Blue Metallic 4.2L I6 4X4
Join Date: Aug 2013
Location: Villard, MN
Posts: 72
I think that would be really cool. I love my 4.2 tho, but I have a 3.73 rear end so I get a little more power. I also avg about 21 mpg. It just depends on what you like I guess. The hardest part of your project is going to be is getting the big 6.5 under the hood. You might also run into some front end trouble from adding the extra weight. If you were to do the conversion, it might notbe a bad idea to put 3/4 ton springs in front. Its a great idea and I say go for it. Good luck
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  #3  
Old 08-21-2013, 03:56 AM
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ethen1 ethen1 is offline
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2002 Chevy TrailBlazer LT
Midnight Blue Metallic 4.2L I6 4X4
Join Date: Mar 2013
Location: newstanton pa
Posts: 19
I think you should go for it ! I have thought about putting a diesel in my trailblazer ! I was gonna put a Cummins turbo diesel in since it is an i6 just like what is in yours now ! Go for it !

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  #4  
Old 08-21-2013, 03:58 AM
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ethen1 ethen1 is offline
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2002 Chevy TrailBlazer LT
Midnight Blue Metallic 4.2L I6 4X4
Join Date: Mar 2013
Location: newstanton pa
Posts: 19
O and I'd defenitly beef the front suspension up!

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  #5  
Old 03-07-2014, 11:32 AM
stellafin5 stellafin5 is offline
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2002 GMC Bravada
Liquid Silver Metallic 6.0L LS2 V8 4X4
Join Date: Nov 2013
Location: NJ
Posts: 30
Go for it..
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  #6  
Old 04-05-2014, 08:59 PM
Chipjumper Chipjumper is offline
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2005 Chevy TrailBlazer LS
Black 4.2L I6 AWD
Join Date: Mar 2014
Location: Michigan
Posts: 6
I would consider finding an old 80's 4.3 GM diesel, rebuild it, ARP studs and bi-metal gaskets, and find a 4l60e with BOP mounting. I would want to do this the easiest way possible. I don't know if any did NOT come with BOP trans pattern.
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  #7  
Old 04-21-2014, 11:14 PM
delphiaacosta delphiaacosta is offline
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2007 Buick Envoy SLE
Emerald Jewel Metallic 4.2L I6 2WD
Join Date: Apr 2014
Location: US
Posts: 1
Let's stick to a Envoy vs Pilot comparison just to keep it simple.

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  #8  
Old 04-25-2014, 11:44 PM
RJenkins1581 RJenkins1581 is offline
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2002 Chevy TrailBlazer LTZ
Pewter Metallic 4.2L I6 4X4
Join Date: Sep 2012
Location: Seattle, Wa
Posts: 37
If you want to put a diesel in your envoy id say go for it. However a 6.5idit (indirect injection turbo) has 100 less HP then the 4.2 L6. Not to mention easily another 250lbs. It will be a HUGE DISAPPOINTMENT. As for a 6BT (Cummins) its definitely way to heavy. A 4BT Cummins would work nut your talking 150hp with a good amount of money. You would be better off putting a 6.0 or a modded 5.3. At least it will bolt in and not require to much fab work. Im not saying the 6.5 or 5.9 wont work just, Just going to cost a LOT of money and your not going to be impressed. You could also do a ported head and header with a tune for the 4.2 or a gear change. Just a tune will wake up the engine and spin the tires if thats what your looking for.
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  #9  
Old 07-19-2014, 11:39 PM
40trailblazer 40trailblazer is offline
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2006 Chevy TrailBlazer LT
Summit White 4.2L I6 4X4
Join Date: Mar 2009
Location: Sioux Falls, SD
Posts: 36
6.5 turbo diesel was NOT a good motor. The diesel idea is ok but I'd find a better option. VW has a 3L turbo diesel that would work great in a TB. The 4.2L is capable of making good power but GM has it choked to death so bad with torque management and emissions it doesn't stand a chance. A turbo option or even better a blower option would really wake the 4.2 up. Blowers are better for gassers since they can only handle so much boost anyway without pre-ignition issues and you get away from the lag and other reliabilty issues turbo's can have. GM had a supercharged 3.8L in the Impala's and Monty's ('03-'05). It would only take a small belt pully change to match that to a 4.2 engine size. PCM for Less did a good job of taking out the torque management on my '06 and really gave it some life.
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  #10  
Old 07-20-2014, 04:02 PM
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manvoy05 manvoy05 is offline
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2005 GMC Envoy SLT
Victory Red 4.2L I6 4X4
Join Date: Jul 2013
Location: montgomery, al
Posts: 7
Where you get the turning option or different gears for the 4.2
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