swap ? ecm - The 1947 - Present Chevrolet & GMC Truck Message Board Network

4x4k30 · 11-04-2017, 05:03 PM

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 ?

BR3W CITY · 11-04-2017, 06:52 PM

02 = GenIII
07= GenIV
Not the same.

4x4k30 · 11-04-2017, 07:06 PM

ok thanks

ls1nova71 · 11-04-2017, 08:22 PM

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.

izzy_Britton · 11-05-2017, 12:35 AM

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.

11-04-2017, 05:03 PM	#1
4x4k30 Registered User Join Date: Jun 2003 Location: ga Posts: 630	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 ? __________________ 4x4k30 if trouble was money i would have plenty

11-04-2017, 06:52 PM	#2
BR3W CITY meowMEOWmeowMEOW Join Date: Sep 2009 Location: MKE WI Posts: 7,128	Re: swap ? ecm 02 = GenIII 07= GenIV Not the same. __________________ *'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING* MY BUILD THE H8RDCPTR //\\ MY YOUTUBE CHANNEL REV J HD

11-04-2017, 07:06 PM	#3
4x4k30 Registered User Join Date: Jun 2003 Location: ga Posts: 630	Re: swap ? ecm ok thanks __________________ 4x4k30 if trouble was money i would have plenty

11-04-2017, 08:22 PM	#4
ls1nova71 Registered User Join Date: Dec 2009 Location: Independence Mo Posts: 4,118	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. __________________ My '72 short bed build. http://www.ls1tech.com/forums/conver...6-0-4l80e.html 5.3 swap into my RUSTY '71 C10 http://ls1tech.com/forums/conversion...71-c-10-a.html

11-05-2017, 12:35 AM	#5
izzy_Britton Registered User Join Date: Apr 2013 Location: Nor-Cal Posts: 632	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. __________________ WHO_DCTC - Wifes 05 Z-71 Build - Now defunct as she decided she wants an Escalade too Cream Puff - LS'd Square - Slow going on the back burner Tripple Threat - 3 Wrecks for the price of one build thread Project Delongdium - Step-Sons Plastic Clad 2003 Avalanche - DONE and Delivered.

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