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Old 11-04-2017, 05:03 PM   #1
4x4k30
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swap ? ecm

I bought a 2002 Tahoe with a 5.3 but also I had bought a 2007 1500 5.3 well I need to know if the 02 wiring harness and ecm will work on a 2007 ?
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Old 11-04-2017, 06:52 PM   #2
BR3W CITY
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Re: swap ? ecm

02 = GenIII
07= GenIV
Not the same.
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Old 11-04-2017, 07:06 PM   #3
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Re: swap ? ecm

ok thanks
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Old 11-04-2017, 08:22 PM   #4
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Re: swap ? ecm

Thats the case most of the time, but they made both engines in '07, so if its out of a Silverado Clasic or a van it will be a GEN 3 engine. You should be able to tell them apart since the crank sensor and knock sensors are in different spots on the 3 than the 4.
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Old 11-05-2017, 12:35 AM   #5
izzy_Britton
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Re: swap ? ecm

you can usually tell the genIII from the genIV by the color of the crank position sensor if your engine is mostly apart. The genIII's should have a black crank position sensor where the genIV should be white or grey.

note: crank position sensor is hidden behind starter.
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