Q: Engine swap from 327 to 1999 Vortec 350?

asked by on March 12, 2016

Have a 2003 Chevy z71 with a 327.. the engine is blown and needs replacing. I have a friend that has a totaled 1999 Chevy z71 with 5.7 350. I'm wondering if the vortec 350 will work in my truck and plug right into my wiring harness. I can get his transmission and anything else necessary to make this swap work.. I need to know where exactly I stand and the entire procedure if this is even possible.. my email is bamajosh@Hotmail.com if that's easier to communicate then that would be fine..I will appreciate any and all help!! Thanks -Josh
My car has an automatic transmission.

The engine swap should not be a problem. The problem you are going to have is the two wire harnesses and computers being different as this could make it more difficult to program each computer. You may not be able to just swap these two engines since the two are four years apart. It is not the base engine that is the difference - it is the accessories and sensors that may make it a problem. I looked at the two different wiring diagrams and they don’t appear to be the same. Your best bet may be to consult a professional to inspect the vehicle and the two engines in person to see if this engine swap is possible. This can help ensure that the engine you choose to swap for is a great match.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

What others are asking

How much for brake pads front and back cost about with labor

Hi there. To receive an estimate to have this service completed on your Land Rover, click this link to the brake rotor / pad replacement page. Once on that page, click the blue Get a Quote button and enter your...

Gettin s light brown coolant color wit s sweat smell was wondering how to tell if it its jus the fitting or the radiator itself

Your coolant is sweet smelling and is normal. The oil in the coolant is not normal and is most likely caused by the transmission oil cooler inside the radiator that is leaking. First remove the oil cap and look for...

Why does my truck cut off when the TPS is unplugged

Hello there, A few different items can cause the truck to shut off this way. The TPS may not be the cause. Most likely causes would be a vacuum leak, MAF sensor, oxygen sensor, or an exhaust leak. If you...

Check Engine Light on.

It sounds like you have a bad misfire. While a faulty O2 sensor could be the cause, it is not the most likely. A misfire can be caused by anything that prevents the air/fuel mixture from igniting properly inside the...

Bcm replacement

If you are certain that the BCM has failed and you intend to get one from the junkyard anyway, I would recommend simply giving it a try. If it works, problem solved. If it does not work, it is very...

What could cause blown turn signal fuses if the turn signal switch and the flasher relay have been replaced?

Hi there. From the events you have described. The problem you are having with the turn signal fuse blowing, does not appear to be related to the turn signal circuit. It may be related to the heat/ac not working. The...

How much is a flywheel and torque converter? Are those parts worth replacing on my vehicle?

When the starter was diagnosed as bad the flywheel teeth the starter mate to when trying to turn over the engine may have broken or worn teeth and cannot engage each other anymore. Why the torque converter would need replaced...

rough start, high idle on start, missfiring and bogging out

If you have a check engine light on then have it tested to see what fault codes are present. You should still be under warranty and the dealer will fix it for free if it's a failed part. If it...

My car starts up and runs about 15 minutes & dies, after15 minutes it will start right back up, i noticed the fan not turning on 2

Hello there. Unfortunately, there are many faults that could cause your 2004 Chevrolet Aveo to stall and die after 15 minutes. Common faults are the battery, alternator, fuel pump, fuel filter, battery cable, coil, or a wiring harness fault. The...

Related articles

Understanding Chevrolet Oil-Life Monitor (OLM) System and Lights
Car symbols, or dashboard lights, are a car service reminder. The Chevrolet Oil Light Monitor system indicates when and what service your car needs.
The Best Used Cars to Buy If You're a Dog Trainer
If If you are a dog trainer, you expect a lot from your vehicle. You want a ride that is safe, roomy, and of course, dog friendly, since your training operation will often mean that you need to transport the...
A Buyer’s Guide to the 2012 Chevrolet Suburban
The The 2012 Chevrolet Suburban offers large amounts of space to carry around a growing family or to transport supplies to your favorite camping spot. It is available in heavy duty and half ton models. Key Features The 1500 Suburban...