Aleromod.com - View Single Post - 99' Alero - 3500/4T45-E swap. DTCS/ECT

nixtux · 09-28-2011, 05:56 AM

It's looking like the PCM from 2002/3 should fit. Whether it will work is the question. However, I'm slowly getting the wiring double checked. I need to get the manual for the GT yet or find a diagram online. Maybe it's just a pin off or something. That'd make it easier. Otherwise, I'll try a 02/03 PCM but it looks like they have the same wiring as the 99. So I'm guessing it's going to come down to rewriting the harness to the transmission.

09-28-2011, 05:56 AM	#19
nixtux GX Member Join Date: May 2010 Location: MN Posts: 20	It's looking like the PCM from 2002/3 should fit. Whether it will work is the question. However, I'm slowly getting the wiring double checked. I need to get the manual for the GT yet or find a diagram online. Maybe it's just a pin off or something. That'd make it easier. Otherwise, I'll try a 02/03 PCM but it looks like they have the same wiring as the 99. So I'm guessing it's going to come down to rewriting the harness to the transmission. __________________ 1999 Alero GLX 4dr Whi 3500 (stock ATM)/4t45e (3.29) Had a cammed 3500 built but exhaust valves hit. Cash is tight so time will tell why.