2004-2012 Colorado, Canyon, Hummer H3, Isuzu i-series | CPW | LSX Harness | LSX Swap Harness | LSX WiringCPW | LSX Harness | LSX Swap Harness

Description

These harnesses are not kept in stock and are made to order.

Custom built for GM LSx/Vortec in to 2004-2012 Chevy Colorado, GMC Canyon & 2005-2010 Hummer H3, Isuzu i-280, i-350, i-290, i-370

The Chevy Colorado/GMC Canyon pickups have some unique qualities that make a 100% direct plug-and-play harness a bit tricky. The 2004-2007 Colorado ECU can not be programmed to run a V8 engine and trans, so the ECU must be replaced with one from a compatible V8 vehicle to work. We recommend keeping electronic throttle in any Colorado LS swap if you want to keep the factory functions of the dash, A/C, ABS, cruise, etc. after the swap is complete. The LS1 style ECU’s (Blue/Red and Blue/Green) do not interface well with the Colorado BCM and instrument cluster, and have been known to cause strange issues like adding extra mileage on to the odometer for no reason.
Recommended ECU for a 24x LS swap (97-2006 engine) is the E40 ECU which can be programmed as a Trailblazer or SSR to accommodate the new engine and still communicate well with the Colorado’s electronics. With the Automatic transmissions, this also requires a factory GM production Transmission computer from the Trailblazer or SSR to be added in as well. Also, changing the Colorado gas pedal to a Trailblazer pedal, and installing LS2 style knock sensors are required to work with the new E40 V8 ECU and production operating system.
While we can setup initial programming for the 24x swaps using the E40 ECU, non-LS2 engine parts, like throttle body or MAF, may require additional tuning for the E40 LS2 ECU to work properly with the specific parts being used in the swap. We strongly suggest finding a local tuner that can alter the tuning on the vehicle to dial in the program to your specific components.

With the 58x LS Swaps (2006-newer) an E67 ECU can be used, and depending on the exact engine being installed and year of the truck, the E67 can be programmed as a 2007-2009 Trailblazer or 2009-up V8 Colorado. With the Colorado programming, the stock Colorado pedal does not need to be changed. This is a nice combination with a 2008-newer Colorado to use a 58x LS engine because the stock Colorado engine computer (E67) CAN be flashed to operate the 58x engine, and so it’s a much more compatible combination than others (08-up Colorado/Canyon with 06-newer 58x LS Engine).

One thing to keep in mind on the mechanical side of things, if you plan to try and re-use your stock transmission from the I4 or I5 engine, it will not directly bolt up to a V8. The bell housing would need to be changed to a V8 bell housing in order to match up to the engine’s bolt pattern, and the input shaft will need to be changed to work with the V8 Torque converter. The stock Colorado converter will not match up to the LS flexplate, and the LS torque converter will not drop on to the Colorado input shaft.

That brings us to the “uniqueness” of these trucks and what is involved with the engine harness installation.

Take a look at the video below to see this part being installed

2004-2007 Colorado/Canyon, H3

Things you need to know

If you plan to install a 24x LS engine (1997-early 2007)

We will suggest keeping or converting the engine to electronic throttle.
We will suggest using an E40 ECU, and with Automatic transmissions, a compatible TCM. (We can supply if needed)
While we can setup initial programming for the 24x swaps using the E40 ECU, non-LS2 engine parts, like throttle body or MAF, may require additional tuning for the E40 LS2 ECU to work properly with the specific parts being used in the swap. We strongly suggest finding a local tuner that can alter the tuning on the vehicle to dial in the program to your specific components.
The starter function will need to be addressed with the V8 swap. Either a starter button will be needed, or our optional modified ignition switch can be used.
We will suggest installing LS2 knock sensors on the engine if it does not already have them.
We will suggest changing the accelerator pedal to a Trailblazer pedal p/n 15145758. (We can supply pedal and bracket)
For the Colorado/Canyon harnesses, we will not need any wiring shipped to us, a new harness is custom made with 100% new materials.
With the Hummer, we will need the harness from the H3 sent to us to re-use some components.
Cruise control will be integrated in to the harness and should work with your stock truck’s cruise control stalk.
Electric fan relays and wiring are pre-installed in our harness.
Many of these swaps require the use of a “Generator Battery Control Module” which is a small plastic box attached to the negative battery cable on many ’06-up trucks and SUV’s. We have found that the alternator will usually charge properly without this module, but the instrument cluster in the truck will display the battery light if this module is not present. GM P/N 25826405 (or equivalent)

If you plan to install a 58x LS engine (2006-2014)

We will suggest keeping electronic throttle.
We will suggest using an E67 ECU, and with Automatic transmissions, a compatible TCM. (We can supply if needed)
The starter function can be re-learned in some 09-12 model year trucks and a modified ignition switch or starter button is not always necessary
The stock Colorado/Canyon pedal can usually be retained since a 2009-newer Colorado/Canyon operating system can usually be used.
For the Colorado/Canyon harnesses, we will not need any wiring shipped to us, a new harness is custom made with 100% new materials.
With the Hummer, we will need the harness from the H3 sent to us to re-use some components.
Cruise control will be integrated in to the harness and should work with your stock truck’s cruise control stalk.
Electric fan relays and wiring are pre-installed in our harness.
Many of these swaps require the use of a “Generator Battery Control Module” which is a small plastic box attached to the negative battery cable on many ’06-up trucks and SUV’s. We have found that the alternator will usually charge properly without this module, but the instrument cluster in the truck will display the battery light if this module is not present. GM P/N 25826405 (or equivalent)

There is a blue connector that plugs in to your stock Colorado/Canyon ECU (C1) on the firewall that is a part of the body wiring. This section of the harness comes through the firewall and connects the ECU to the interior wiring and modules inside the truck’s cabin. This connector does not come out with the engine harness, and will need to be addressed when the new harness is installed. Our custom direct-fit engine harness will include a mating connector to plug in so no splicing or moving wires around will be needed. We also offer an ignition switch with an extra wire to operate the starter when needed with the new V8 ECU. The stock Colorado ignition switch sends a signal when the key is turned to the start position to the body control module, then the body control module tells the ECU to operate the starter. The E40 V8 ECU doesn’t work this way, and requires a direct 12V from the key to the ECU to trigger the starter.

2008-2012 Colorado/Canyon

Things you need to know

If you plan to install a 24x LS engine (1997-early 2007)

It is very likely that Stability and traction control systems will not function. Installing a newer (58x) engine will allow all of the electronics to communicate properly and allow proper function of all systems.
We will suggest keeping or converting the engine to electronic throttle.
We will suggest using an E40 ECU, and with Automatic transmissions, a compatible TCM. (We can supply if needed with 4 speed automatics)
While we can setup initial programming for the 24x swaps using the E40 ECU, non-LS2 engine parts, like throttle body or MAF, may require additional tuning for the E40 LS2 ECU to work properly with the specific parts being used in the swap. We strongly suggest finding a local tuner that can alter the tuning on the vehicle to dial in the program to your specific components.
The starter function will need to be addressed with the V8 swap. Either a starter button will be needed, or our optional modified ignition switch can be used.
We will suggest installing LS2 knock sensors on the engine if it does not already have them.
We will suggest changing the accelerator pedal to a Trailblazer pedal p/n 15145758. (We can supply pedal and bracket)
For the Colorado/Canyon harnesses, we will not need any wiring shipped to us, a new harness is custom made with 100% new materials.
With the Hummer, we will need the harness from the H3 sent to us to re-use some components.
Cruise control will be integrated in to the harness and should work with your stock truck’s cruise control stalk.
Electric fan relays and wiring are pre-installed in our harness.
Many of these swaps require the use of a “Generator Battery Control Module” which is a small plastic box attached to the negative battery cable on many ’06-up trucks and SUV’s. We have found that the alternator will usually charge properly without this module, but the instrument cluster in the truck will display the battery light if this module is not present. GM P/N 25826405 (or equivalent)

If you plan to install a 58x LS engine (2006-2014)

Our suggested engine setup for 08-up trucks for best electronics integration.
We will suggest keeping electronic throttle.
We will suggest using an E67 ECU. The 2008-2012 Colorado trucks come with an E67 that, in most cases, is compatible with 58x V8’s and can be reprogrammed to run the new engine.
The starter function can be relearned in most cases and a modified ignition switch or starter button is not always necessary. The relearn function requires more advanced scan tools, or a dealership to perform the BCM>ECM relearn procedure which allows the stock ignition switch to work after the swap with the new/reprogrammed ECM.
The stock Colorado/Canyon pedal can usually be retained since a 2009-newer Colorado/Canyon operating system can usually be used.
For the Colorado/Canyon harnesses, we will not need any wiring shipped to us, a new harness is custom made with 100% new materials.
With the Hummer, we will need the harness from the H3 sent to us to re-use some components.
Cruise control will be integrated in to the harness and should work with your stock truck’s cruise control stalk.
Electric fan relays and wiring are pre-installed in our harness.
Many of these swaps require the use of a “Generator Battery Control Module” which is a small plastic box attached to the negative battery cable on many ’06-up trucks and SUV’s. We have found that the alternator will usually charge properly without this module, but the instrument cluster in the truck will display the battery light if this module is not present. GM P/N 25826405 (or equivalent)

There is a blue connector that plugs in to your stock Colorado/Canyon & H3 ECU (C1) on the firewall that is a part of the body wiring. This section of the harness comes through the firewall and connects the ECU to the interior wiring and modules inside the truck’s cabin. This connector does not come out with the engine harness, and will need to be addressed when the new harness is installed. Our custom direct-fit engine harness will include a mating connector to plug in so no splicing or moving wires around will be needed when changing to an E40 ECU. In the 08-up trucks with 58x engine swap applications, the C1 ECM connector would simply plug back in to the E67 ECU and no changes would be needed to it at all.