Q: Can I swap a 97 4.3 with a 94 4.3?

asked by on December 23, 2016

I'm trying to find out if I can swap a 97 4.3 from a c1500 with a 94 4.3 Also a c1500 and also what all motors and transmissions am I able to put in my 97 c1500

My car has 280000 miles.
My car has an automatic transmission.

Hi there. You can change the engine block, but the cylinder heads will not match up. The cylinder heads for a 94 was made for an intake with a throttle body and injection in the throttle body where the 97 was made with a throttle body with individual injectors to each cylinder. The cylinder heads won’t bolt up to intake manifold. If your swapping the engine out, make sure that all of the sensors are able to be installed onto the engine. You can put any V-6 or V-8 GM engine with a 4L60E transmission either small bell housing or large bell housing into your vehicle. If you need further assistance with your engine swap, then seek out a professional, such as one from Your Mechanic, to help you.

Hello. These engines can be swapped, but it is not an easy switch over. These engines technically are the same size but they do not function the same due to a design change. You need to use a 1996-2000 4.3 in order for it to work directly. You can use the transmission out of any of those years and they will work fine. If you want this to be an easy job it is important that you use the engine VIN from a similar truck.

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

Check Tire Pressure Light

Hello. The first thing I would do is make sure that the tire in question is inflated to proper pressure. If the pressure is low, even by a few pounds, it may set off the tire pressure light. If the...

What is the name of the hose that is on the top of the fuel filter that it's connected to?

The inline fuel filter has 3 lines all combined in the area. The supply hose is connected to the fuel filter. The return hose is connected to the top of the fuel tank. The vapor return hose is connected to...

Problems with shifting.

Transmissions can be totally destroyed inside and not shift or it could be something simple such as a speed sensor if reading erratic. The only way to tell is to have the system thoroughly checked by a certified transmission technician,...

Rain affects engine performance and shifting.

If you are having random problems throughout the vehicle when it is raining then you most likely have various electrical connectors not keeping out the water and wire connections are shorting causing the erratic issues. You will need to go...

Rough idle and there is a raw fuel smell coming from the exhaust.

If the spark plugs were replaced and there is too much fuel in the exhaust system, then the injectors are leaking and not spraying (atomizing) the fuel properly. A leaking fuel o-ring will make the fuel puddle up outside of...

Jerking and jumping

Hi, thanks for your question. This is a common symptom of a bad or failing mass air flow sensor. This is a component that regulates the amount of air that flows into the intake system of your car as it...

Car has oil leak around middle of engine

Hi there. An oil leak can be a very frustrating ordeal to go through. There are Many types of oils in your vehicle including, engine oil, power steering fluid, transmission fluid, and also coolant. To ensure proper diagnosis, I would...

Hello I have a Chevy impala 2013 the A.c. stopped blowing air a few days ago. Then an error code came up saying engine hot A.C. of

The resolution to this, and the answer to your question, will depend on exactly what trouble codes were stored when the check engine light (CEL) illuminated. To have the fault(s) that caused the CEL to illuminate pinpointed and repaired, please...

Cruise control quit working

Thanks for writing in about your 1998 Chevrolet C1500 Suburban. I would want to diagnose the brake pedal switch first so I wouldn't replace one that is working fine. A technician using scan tool will easily be able to see...

Related articles

Does An Automatic Transmission Have a Clutch?
Most of the time we think of a clutch in the context of a manual transmission. An automatic transmission does have...
A Buyer’s Guide to the 2012 Chevrolet Malibu
While While many people thought that Toyota and Honda had taken over the mid-size family sedan market with models like the Camry and the Accord, Chevrolet surprised the whole market with the Malibu. Available with either a four- our six-cylinder...
A Buyer’s Guide to the 2013 Chevrolet Spark
The The Chevy Spark nimbly walks the line between being functional and being totally adorable. In the spirit of mini cars past like the Ford Festiva and the Yugo, this spritely little creation offers improved safety combined with the tech...