Paul Bell

iTrader: (9)

My 2003 4WD Ascender 5.3 (same as a Trailblazer/Envoy) calls for a GM transmission number 24229175. the same in a 2004 application is GM number 12491894. It looks the same, same wiring harness so the plug pinnings are the same.

The only differance I can see is the torque converter itself is a different GM number.

Can I use the 2004 unit in my 2003 truck?

Paul Bell

iTrader: (9)

The '03 converter is 24213393.

The '04 converter is 24227088.

01ssreda4

iTrader: (96)

If the plug is the same then yes. Only early 700s and 4l60s suffered year to year changes.

Paul Bell

iTrader: (9)

Excellent sir thanks!

My parts guy can get the '04 unit about $500.00 less than the '03 unit and he doesn't need the $700 core charge from me.

Unit ordered, it'll be on the counter tomorrow.

mrvedit

In short, the '03 and '04 are identical; just make sure you are getting a 4WD unit from an LS-engine vehicle.
No idea why GM would even have different part numbers; perhaps due to a tiny change in the shift firmness.

Any pre-'05 (and some 05) LS vehicles can use any '98 through '07 4L60E/4L65E transmission that also came from an LS vehicle.
Some '05 and all '06 and '07 can use any '06 and '07 4L60E/4L65E transmission that also came from an LS vehicle; the difference is that the new computers (TCM) expect to see an Input Speed Sensor (ISS) in the trans.
Some '08 and all '09 and later have significant electrical changes and therefore only work with the '09 and later TCM.

Paul Bell

iTrader: (9)

Thanks for that mrvedit.

I'm not pulling a transmission from a junkyard, I'm purchasing a GM Certified rebuilt transmission than comes with a rebuilt converter.

These units come with a 3 year 100,000 mile warranty-which is comforting as it means they do a "proper rebuild and probably test it on a trans dyno.

However, I doubt I would be able to get a warranty on it as it's going into an Isuzu and technically, it's for a different model year vehicle.

The only thing I'm doing to it is an external cooler and Royal Purple fluid.

While I'm in there, I'm changing the leaky rear main engine seal that has 208,000 miles on it and a new B&M flex plate with ARP bolts.

mrvedit

You might want to consider an aftermarket converter with a higher than stock, but still modest stall. Good units are available starting at $400 (Texas Speed) or $450 (CircleD). (Those might be limited time sale prices. Else about $50 more.)
Of course if you have a hot cam, you definitely want/need at least a 3000 stall.

Current thread on brands: https://ls1tech.com/forums/automatic...onverters.html

Paul Bell

iTrader: (9)

I can't afford it, nor do I have the time. This is my daily driver/work & play vehicle. I have no plans to soup it up. Reliability, cooling, mileage and creature comforts upgrades, yes.