Ecm help!
Sep 13, 2018 | 09:22 AM
#1
Thread Starter
Teching In
Joined: Feb 2018
Posts: 12
Likes: 0
From: Texas
Ecm help!
I have a 2000 silverado I did an Ls1 swap, got a 5.3 harness from a 2001 and used an ecm that my buddy had laying around with a mild tune but it’s file locked so I can’t re use it...the truck turned on and ran with this ecm..I went ahead and bought one from a 2001 silverado Hd wit a 6.0l got a mail order tune from Texas speed and performance and now that i hooked it up it doesn’t seem to wanna start..my question Is.. is there a difference in the pin out on the hd ECMs that I have to change? The new ecm from the HD truck is a 0411 type
Sep 14, 2018 | 05:02 PM
#3
100% Redneck
Joined: Mar 2005
Posts: 2,098
Likes: 1,344
From: MAGA COUNTRY
Don't think the VIN number has to match the truck. My V6 swap Sierra has a Silverado V8 VIN number and works fine. Matter of fact my tuner "tricked" the ECM to display the V6 VIN. That was a nightmare as HPTuners saw a mismatch in the OS and VIN. Lost $200 in credits trying to get it to work. Finally had to send it back to the tuner to have the V6 VIN changed to a V8. Have TSP e-mail you the tune file and post it here. We can see if it's a VAT's issue or the wrong trans (80e) segment that might mess with the PRNDL switch.
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