04' Colorado LS1 swap (Amy's Truck)

[RS/SS 4.8]

Nice. Been looking for one for a while for my 91 Camaro since the last owner screwed the harness up pretty bad. Thanks

[TRPLXL2]

Attachment 7144Attachment 7145Attachment 7146Attachment 7147Attachment 7148

So while we are stuck doing nothing we made some more modifications to the truck, we took some 4" fog lights which used to be behind the grille and we mounted them under the rear bumper as a set of reverse lights. We tied them in with the backup lights, they are 55w each so they should help with backing up.

When we were at the swap meet we came across a used set of 88-98 Silverado body lift gap guards for $10.00, I took a chance and bought them for the Colorado. I trimmed them with a pair od scissors and cleaned them up nice, as you can see they fit pretty good. I was having a hard time spending $140.00 for the one's for the Colorado.

[TRPLXL2]

Major Update!!!!

Okay well I got my HPtuners thursday, took 4 hours to install on my computer as it needed a bunch of updating. Plus Bill from HPT had to help me through my serial number problem, as Summit Racing never sent me an email or letter. Friday I tryed to scan the truck, and the truck locked up with the VATS problem. Well the BCM set a U1000 code which is bad, basically the serial 2 data wire which controls everything on the Colorado!! I searched for DAYS, talked to the Chevy dealer and they had no idea what the hell I was talking about. Basically I learned a lot just by reading my manuals, as no one has ever gone this route with a Colorado.

I ended up unwiring the LS1 wiring, and I put the 5 cylinder harness back in and tried it again, still no dice!! I sat down and started looking at how the serial 2 data wire was routed, It runs to DLC, BCM, PCM, SIR module, Ignition etc. Then a light bulb went off!! 1807 is the Serial data circuit, well since we had the front end off It dawned on me that the airbag sensors were disconnected. We hooked all the airbags back in, and PRESTO!!! Communication with the chassis!!!!

I disabled VATS, then I removed all the 5 cylinder stuff and connected the LS1 back in. The only wire I have connected into the Colorado wiring is the Serial 2 wire, all the other LS1 wires are all by themselves almost stand alone. This was my choice ultimately, as I recieved several emails telling me this could not be done.....

Then I had no communication to the LS1 WTF!!!! I sat down and read and read some more, then I started checking all my hot and ground wires. I had no power or ground to the LS1 computer, so to the fuse box I went. The C2 connector I made up was not fitting correctly, so I made the decision to depin it and wire it directly to the bottom of the fuse box (temporarily)).. I am going to have to buy the correct Colorado connector, so once I got all that done I had the LS1 computer powered up. Hooked up HPtuers again and scanned it, PRESTO!!!!! It read it woooohoooo!!! I tuned out VATS on it also.

I have it all hooked up temporarily now, BCM is communicating with the LS1 computer. No codes either, gauges seem to work as well. Fuel pump worked as It should, so we hooked up the gas line to the fuel rail and got in and cycled the ignition to prime the fuel pump. Well I heard hissing almost like air coming out of the rail, I looked over to the passenger side and one of the injectors was just blowing gas out of the top of it. I am going to take the fuel rail out tomorrow and check it out, I am thinking the o-ring is leaking or I pinched it upon reinstallation. I ordered an injector rebuild kit from Rock Auto for $14.88 shipped, should be here wednesday.

Until then....................

[TRPLXL2]

Update!!!

Got the o rings on the fuel rail, got everything plugged back in. So I turned the key on, and pushed the starter button and about 1 second later it FIRED!!!!!!!!!!!

She runs, but I had to shut it off right away, because there was no fluid in the transmission and nothing up front is hooked up. I am so excited it's not even funny!!! This weekend I'm going to try and do a lot to it, as I have a 4 day weekend.....

[03whitez71]

Congrats! Me personally wouldn't of even turned it over with out fluid in trans. Just me though.

[TRPLXL2]

Alright well we are stuck on the p1626 code right now, even though I have ALL the VATS stuff tuned out, the fuel injectors are still being cut out by that Vats stuff!!!!!! I am going to order a VATS bypass module this weekend, It basically is for an engine swap where the BCM is not being used. I am buying it from Hawk's 3rd Gen parts, I had good luck with him before on other stuff....

Until then, we wait.......................and wait.

[TRPLXL2]

Attachment 7289Attachment 7290Attachment 7291Attachment 7292

Update!!!

Well my bypass was supposed to come today, but the USPS said it was never recieved. Instead of wasting the day I cleaned up the wiring, and got it routed the way I wanted it to be. Just some pics of the wiring harness layout, Instead of running it across the firewall I decided to run it low on the motor. Cleaned the engine bay with 409 again.

[TRPLXL2]

Attachment 7294Attachment 7293Attachment 7295

More pics of the cleaned up wiring.

I also did some more wiring to the transmission, I had originally not hooked up the range wires as I didn't know where they went. After hours of research I figured it out, tomorrow I will see if anything has changed with it. I had the transmission stuck in 3rd gear, and the solenoids were not engaging when prompted. Still waiting pn the VATS bypass, until then!!!

[TRPLXL2]

Attachment 7312Attachment 7313Attachment 7314Attachment 7315Alot has happened since the last post, I willl make it short.

4l60e-range wires hooked up correctly into PNP, kept blowing ignition fuse 15amp. Unplugged the range wires, and problem went away but transmission still shows 3rd gear even though it's clearly in park.

I got the VATS bypass, wired it up and the truck is up and running. I am extremely happy with this now, wires are 100% soldered up and solid.

[TRPLXL2]

Attachment 7316Attachment 7317Attachment 7318Attachment 7319

Went to Summit Racing yesterday, and bought some more stuff for the money pit. I ordered a remanufactured F-body power steering pump from Rock auto which included the reservoir for $92.00, and bought the pulley new off ebay for $49.00. Got 6ft of 5/8" and 3/4" heater hose for $10.00, PCV valve and a T for $5.00.

I am not reusing the factory windshield washer bottle, so I am going old school on this. I bought a glass quart bottle of PBR and a universal windshield washer pump, I am going to wire it up off a switch inside. I hardly ever drive the truck in the rain anyways, this is just something a little different I wanted to do.