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Old 06-26-2010, 03:46 PM
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ls1 swap for a 2001 gmc sonoma

i'm wanting to put a ls1 i recenlty purchased and plan on rebuilding possibly, maybe even stroking. into my 2001 gmc sonoma. the catch is ive got to pass emissions and its my daily driver. not real sure what all ill need my current engine is the 4.3v6. ive read you can reuse the old ecm as long as its reprogramed.
unsure about wire harness, fuel system, acc, and if the trans will hold up.

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Old 06-26-2010, 06:13 PM
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I do late model swaps quite often though admittedly usually LT1 platform. I have done the ls1 swap before and can tell you with confidence that I doubt VERY STRONGLY that the v6 computer will work. Among other things it lacks the drivers for 2 other injectors since going to a v8, and that can not be programmed in. That is a hard wired feature. The other problem is the timing programming operates completely different from the v8, as in different sensor usage.

Now the stock LS1 computer will work with reprogramming. Same with LS1 harness and accessories. As far as fuel goes not sure with newer v6 what psi they operate at. You would need to do a search on what psi your current pump is capable at operating at and compare to the needs of the ls1.

Also going to need to consider the exhaust changes and even air intake possibly. Not a straight forward swap, put not the worst either as long as you have at least worked on and understand the ls1. If you don't, you may want to consider getting/paying for help.

Passing inspection shouldn't be too much of an issue since the ls1 computer would need to be retuned no matter what to work for your truck and they can adjust what would be needed.
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Old 07-03-2010, 09:08 AM
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What will a 4l60e handle? Will it be able to handle a ls1? I'll probably rebuild it. And put a mild stall converter. What about wiring harness? Can I use the old or will I need a whole new one?
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Old 07-03-2010, 11:34 AM
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The 4l60e is the auto that the LS1 came with. There are trans builders out there that sell rebuilds able to handle over 1000hp/tq. So pretty much whatever you will probably throw at it, it can take. For a price ofcourse.

As far as for the harness and computer, the stock LS1 parts work great. Just make sure you have a complete harness to start with. The factory harness is almost stand alone anyway, and would have emmssions controls so you could stay compliant.
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Old 07-03-2010, 02:20 PM
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Quote:
Originally Posted by texas97z
I doubt VERY STRONGLY that the v6 computer will work.
When I did my V8 conversion in my s 10, I only went to a vortec 5.7 (ls's were way to expensive 6 years ago) but I cross referenced the model number for a 4.3l ecm and a 5.7 (again a vortec) and found they were the same model just with a different program... as far as switching from a std 4.3 to LS program though, you really want the 411 pcm, it's fully cracked, you can tune any and every aspect of it, I would recommend getting an entire harness, sensors, and possibly acc. from a donor vehicle along with the ecm or finding a vehicle with the 411 ecm in it.
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Old 07-06-2010, 11:50 AM
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Your S10 probably has the 411 PCM in it. And yes you can flash the 411 with any calibration you wish. A lot of the 1996-99 fullsize truck guys use teh 411 PCM flashed with a calibration from a 2001-2002 Chev fullsize van(Express). The reason is because teh 01-02 Express van used the L31 Vortec 350 that was controlled by the newer 512kb 411 PCM. teh 411 PCM willalso take an LS1 cable throttle Camaro/Firebird calibration and will also take a Electronic Throttle(ETC) Corvette LS1 calibration.
The 411 PCM is very flexible.

the 4.3 in your S10 will bolt up to the LS1, you may need to run a spacer and longer bolts, but I doubt it.

The L31 Vortec 350 is an easy swap, as is the LS1.
Your stock 4l60e has the V6 torque converter, thsi TC will stall to about 2300rpm behind a Vortec 350. I have been running a 4.3 V6 trans and torque converter behind my stock longblock Vortec 350 97 truck for years. I can get the tach to read 2700rpm in drive at WOT without teh rear wheels spinning. Teh V6 TC is a nice upgrade. It allows for greatly reduced rpm drop during WOT shifts, and allows for a harder launch from a dig.

peace
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Old 07-06-2010, 08:29 PM
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Thats really good info about the computer. But you still should be able to find a harness and ecm all as one, as already been suggested. But I am glad that I was wrong and learned something. Opens up more possibilities for you.
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Old 07-16-2010, 06:39 PM
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now wont the 4l60e scatter is i run it with the ls1? i plan on building a stout ls1.
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Old 07-17-2010, 08:34 AM
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Quote:
Originally Posted by orangecounty175
now wont the 4l60e scatter is i run it with the ls1? i plan on building a stout ls1.
The 4l60e was used by GM behind the LS1 and used the 4l65e behind the 345hp/380tq LQ9 6.0 engine.
A stock trans can scatter if ran hard, same as any other mechanical part.

peace
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