Hello, I have an ECU already tuned for my setup but it was from my old truck. I?m still in the process of finishing the engine swap. I was wondering if an ECU from a 2003 Silverado 5.3 2wd will work in a 2003 Silverado 5.3 4wd. Thank you.
Hello, I have an ECU already tuned for my setup but it was from my old truck. I?m still in the process of finishing the engine swap. I was wondering if an ECU from a 2003 Silverado 5.3 2wd will work in a 2003 Silverado 5.3 4wd. Thank you.
The same ECU will work, but will have to be tuned for your specific application...
Namely, your gear ratios, tire sizes, 4wd DTC's and platform options.
Any ECMs/PCMs that have the same Service Number are interchangeable - after a vehicle-compatible base OS is flashed in.
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