5.3 service #

[skeet]

yeah i have read that thread, very useful...The ecm he gave me says green and blue connector, and the harness on the engine that it came with has red and blue connectors. I'm sure this is the harness because it was attached and looks oem. Now the ecm was seperate and I know they separate them all the time.
Looks like he did give me the wrong pcm after all.

so any 5.3 pcm will work although i'm going to use a 4l60e...I understand any old 350, 400, or 700 will do no matter what. But the 4l60 is controlled by the pcm to shift. does it matter what service number i get?
Thanks

sounds like you got the 99-02 wire harness, so get a 99-02 pcm the last digits will be 411 which is better than the 99 model pcms. 5.3 6.0 anyone can be programmed to operate a 4l60e or 4l80e its only gonna depend on the harness, if its for 4l60e or 4l80e

[rammor02]

sounds like you got the 99-02 wire harness, so get a 99-02 pcm the last digits will be 411 which is better than the 99 model pcms. 5.3 6.0 anyone can be programmed to operate a 4l60e or 4l80e its only gonna depend on the harness, if its for 4l60e or 4l80e

cool, well i asked the guy if he had an ecm with the last #'s 411 and he said, no.
Is there any other ecm's that i can use or like you said any 99-02 will work.
I'm thinking this guy is just too lazy to check and since he already made the sell who cares, right...I guess I'm gonna have to stay on his ass about this one.

[RedHeartbeat]

you could just order your tune from NelsonPerformance and ask for a 411 pcm. They will sell you a PCM alone if that is all you want.

[skeet]

you could just order your tune from NelsonPerformance and ask for a 411 pcm. They will sell you a PCM alone if that is all you want.

Yep and also Tune it for ya!!! to meet your needs !!!