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Unread 06-03-2011, 04:44 PM   #1
S D
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Default Speed's Colorado build log

The truck is a 2005 Regular Cab Colorado Xtreme. Factory equipped with a 2.8 Liter 4 Cylinder engine and automatic 4L60E transmission. It has an open (Yuck!) rear differential with a 3.73 ratio.

A picture of the truck before I debadged the Xtreme emblems and removed the mud flaps.


My plans are to go with a boosted 6.0 LS V8 and hopefully have the swap completed before I am so old they take away my license.

The parts I currently have for the swap are:
Exhaust manifolds
Full fueling setup from tank to rail
Drive by wire Throttle Body
Hummer/Colorado 5.3 Oil Pan kit

The parts I still need are:
Wiring harness
Motor mounts
Engine
Intake manifold
Accelerator pedal
Accessory drive
Limited slip/traction aid
V8 bellhousing, torque converter, and input shaft
Any other little things like coolant and radiator hoses, fluids, etc.


06 5.3 Envoy/Trailblazer ECU


06 Envoy ECU next to LS1 Style ECU for reference. Look at the size difference! Note: The LS1 ecu has a built in transmission control unit, the 06 5.3 ECU does not.


Trailblazer/envoy 5.3 Throttle body. This thing is massive.
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Unread 06-03-2011, 04:46 PM   #2
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The UPS man came today and left me some more goodies!

Hummer H3/ Colorado V8 5.3 Oil pan kit. Complete from dipstick to gasket with all new hardware, everything I need for the oiling setup.

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Unread 06-03-2011, 04:47 PM   #3
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Unread 06-03-2011, 05:04 PM   #4
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DBW is going to be your WORST nightmare ever.

Just sayin
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Unread 06-03-2011, 05:30 PM   #5
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Quote:
Originally Posted by cluffenstein View Post
DBW is going to be your WORST nightmare ever.

Just sayin
The only way for my gauges to function properly is with an E40 ecu from an 05 or 06 Trailvoy, as this will communicate properly with my BCM. This ECU only works with an 05 or 06 Trailvoy DBW accelerator pedal.

So to have my gauges (along with other things) work I need to stick with the DBW system and the E40 ECU.
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Unread 06-03-2011, 09:59 PM   #6
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The 5.3l TB may seem massive but compared to the Ls2 TB stock its small I think to boost your going to either need a bigger TB like 100mm or loose the TBW altogether for a cable. Most LS2 go bigger TB just on a mild engine build. The LS3 TB, intake, with a LS7 MAF would probably work fine with no restriction. And pretty east to come by cheap. Since they get upgraded also. Either way the sensors and pedals all operate with the same sensor ranges meaning interchangable. Even the Nick Williams TB is pretty reasonable given the quality.
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Unread 06-04-2011, 03:22 AM   #7
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Originally Posted by lautinjr View Post
The 5.3l TB may seem massive but compared to the Ls2 TB stock its small I think to boost your going to either need a bigger TB like 100mm or loose the TBW altogether for a cable. Most LS2 go bigger TB just on a mild engine build. The LS3 TB, intake, with a LS7 MAF would probably work fine with no restriction. And pretty east to come by cheap. Since they get upgraded also. Either way the sensors and pedals all operate with the same sensor ranges meaning interchangable. Even the Nick Williams TB is pretty reasonable given the quality.
If it's possible to run the E40 ECU with a drive by cable throttle body I would greatly prefer that. If I am going to wire this myself a cable TB would simplify this swap a ton.

Edit: Looks like using a drive by cable TB and the E40 ECU isn't possible without lots of custom work.
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