The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post

**truckster** · 03-15-2013, 05:10 PM

I picked up a 97 5.7 Vortec today for my Blazer, and I've got some questions.

How complicated is the wiring and ECM? Would I need to have the ECM flashed, and do I really need to run 4 O2 sensors? What about VSS?

I'm thinking about buying a manifold and putting my Quadrajet and HEI on it to make it simpler.

Any thoughts?

03-15-2013, 05:10 PM	#1
truckster Senior Member Join Date: Jan 2001 Location: Orem, Utah Posts: 8,031	5.7 Vortec Install Questions I picked up a 97 5.7 Vortec today for my Blazer, and I've got some questions. How complicated is the wiring and ECM? Would I need to have the ECM flashed, and do I really need to run 4 O2 sensors? What about VSS? I'm thinking about buying a manifold and putting my Quadrajet and HEI on it to make it simpler. Any thoughts?