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1999 Chevrolet Silverado Engine Swap, 2000 Harness, Computer


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ccroasmun67 
Member - Posts: 1
Member spacespace
Joined: March 28, 2021
Location: Ohio, United States
Posted: March 28, 2021 at 7:50 AM / IP Logged Link to Post Post Reply Quote ccroasmun67
I have a 1999 Silverado with a blown 4.3. I bought a 35,000 mile 1999 5.3 donor truck and have the computer and harness with the motor. The only problem is donor harness is for a manual tranny and I have automatic. I have since went to the junk yard and pulled a Silverado harness for an automatic. I checked and all sources were saying harness was explicit to year, the only harness I could find was a 2000 Silverado.
My question is will the 2000 harness work on my 1999 5.3? When I got the junk yard harness since it was 2000 and all sources were saying everything was year specific, I grabbed the 2000 computer also incase pinout was different.
Should I use the 2000 harness with the 1999 computer, or use both the 2000 harness and computer.
Thanks in advance guys!!!!
Chuck
Ween 
Platinum - Posts: 1,303
Platinum spacespace
Joined: August 01, 2004
Location: Illinois, United States
Posted: March 28, 2021 at 3:36 PM / IP Logged Link to Post Post Reply Quote Ween
Have you looked here: WWW.LT1SWAP.COM or here: https://ls1tech.com

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