Swaping V6-V8 Chevy Silverado
Thread Starter
Registered User
Joined: May 2008
Posts: 4
Likes: 1
Swaping V6-V8 Chevy Silverado Hey,
Im looking into swaping my 4.3 V6 to the 5.3 V8 or 6.0 V8.
I belive they should swap right in being the same engine mounts.
What all will i have to change out?
Will my tranny work with these?
i really want to go big and do the 6.0 from either and esclade/silverado ss/2500.
But i just want to make sure it will fit directly.
Also if anyone knows some good websites to look some engines up that would be great. Currently im checking junk yards.
Any responose would be great!
Im looking into swaping my 4.3 V6 to the 5.3 V8 or 6.0 V8.
I belive they should swap right in being the same engine mounts.
What all will i have to change out?
Will my tranny work with these?
i really want to go big and do the 6.0 from either and esclade/silverado ss/2500.
But i just want to make sure it will fit directly.
Also if anyone knows some good websites to look some engines up that would be great. Currently im checking junk yards.
Any responose would be great!
Thread Starter
Registered User
Joined: May 2008
Posts: 4
Likes: 1
Here is a writeup man, everything you need to know:
http://performancetrucks.net/forums/...d.php?t=378643
http://performancetrucks.net/forums/...d.php?t=378643
Thread Starter
Registered User
Joined: May 2008
Posts: 4
Likes: 1
Here is a writeup man, everything you need to know:
http://performancetrucks.net/forums/...d.php?t=378643
http://performancetrucks.net/forums/...d.php?t=378643
Teching In
Joined: Mar 2013
Posts: 1
Likes: 0
v6 to v8 swap I have a 06 silverado with 4.3 liter put in 5.3 liter.
Well the swap 2006 silverado 1500 W/T 4.3L to 5.3L is a very easy swap. All you need is engine,wiring harness,PCM,ac lines,both radiator hoses,heater hoses,and machine shop to make mounts for engine block(3/4" thick X 4" high X 6 1/2 " long) drilled and milled for mounting to block then move 1 1/16 " over and drill and tap for motor mounts. This will let you use the V-6 motor mounts and frame mounts with your V-8. Also you need to get a tee fitting 1/2" X 1/2" X 1/4" for the cooling line from throttle body to the over flow line from tank to radiator,then the O2 sensors are male plugs and the wiring harness is male plugs also, I used pins cut at 3/4" long and rubber tape then electrical tape to keep moisture proof.Also you have to get the electrical schematics to wire the cruise control. MAKES YOUR TRUCK NEW AGAIN, LEARN TO DRIVE ALL OVER
I do have one problem anti-lock brakes. The system works for about 75feet then it drops out and the service brake system comes up on the dash and the ABS & brake light on the dash come on. I know it is in the wiring. My 4.3 was cable throttle 5.3 is electric. Could any one tell me witch wires need to be hooked up. Should be from the old cruise control to the new PCM. The 4.3 was 2006. The 5.3 is 2005. HELP
Well the swap 2006 silverado 1500 W/T 4.3L to 5.3L is a very easy swap. All you need is engine,wiring harness,PCM,ac lines,both radiator hoses,heater hoses,and machine shop to make mounts for engine block(3/4" thick X 4" high X 6 1/2 " long) drilled and milled for mounting to block then move 1 1/16 " over and drill and tap for motor mounts. This will let you use the V-6 motor mounts and frame mounts with your V-8. Also you need to get a tee fitting 1/2" X 1/2" X 1/4" for the cooling line from throttle body to the over flow line from tank to radiator,then the O2 sensors are male plugs and the wiring harness is male plugs also, I used pins cut at 3/4" long and rubber tape then electrical tape to keep moisture proof.Also you have to get the electrical schematics to wire the cruise control. MAKES YOUR TRUCK NEW AGAIN, LEARN TO DRIVE ALL OVER
I do have one problem anti-lock brakes. The system works for about 75feet then it drops out and the service brake system comes up on the dash and the ABS & brake light on the dash come on. I know it is in the wiring. My 4.3 was cable throttle 5.3 is electric. Could any one tell me witch wires need to be hooked up. Should be from the old cruise control to the new PCM. The 4.3 was 2006. The 5.3 is 2005. HELP
Last edited by skeeter_123; Mar 2, 2014 at 02:41 PM. Reason: my help to others
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Registered User
Joined: Oct 2015
Posts: 1
Likes: 0
2001 4.3 to 350? Hey guys I'm new to this but I have a 2001 chevy 1500 2x4 4.3v6 auto Trans 3.08 gears.... now I want to turn key this to a 350 vortec with a nv4500 5speed ... I've heard that there is chevy express vans 2001+ 350 and 4L80E 2x4 .... is the engine possible and swap the whole computer and use the express computer since there is no other body modules to worry about ?
Registered User
Joined: Apr 2016
Posts: 1
Likes: 0
engine swap out, 4.3 in a 2002.. and install complete 5.3 in a 2004 I have a totalled 2003 & 2004 Chevy Silverado5.3 That I want to repace my TBI 4.3 out with
Now I want to use everything motor, computer & harness, trans, even though mine has a 4L60E in it.
Will it excahnge?
Now I want to use everything motor, computer & harness, trans, even though mine has a 4L60E in it.
Will it excahnge?
Registered User
Joined: Aug 2016
Posts: 1
Likes: 0
I have a 06 silverado with 4.3 liter put in 5.3 liter.
Well the swap 2006 silverado 1500 W/T 4.3L to 5.3L is a very easy swap. All you need is engine,wiring harness,PCM,ac lines,both radiator hoses,heater hoses,and machine shop to make mounts for engine block(3/4" thick X 4" high X 6 1/2 " long) drilled and milled for mounting to block then move 1 1/16 " over and drill and tap for motor mounts. This will let you use the V-6 motor mounts and frame mounts with your V-8. Also you need to get a tee fitting 1/2" X 1/2" X 1/4" for the cooling line from throttle body to the over flow line from tank to radiator,then the O2 sensors are male plugs and the wiring harness is male plugs also, I used pins cut at 3/4" long and rubber tape then electrical tape to keep moisture proof.Also you have to get the electrical schematics to wire the cruise control. MAKES YOUR TRUCK NEW AGAIN, LEARN TO DRIVE ALL OVER
I do have one problem anti-lock brakes. The system works for about 75feet then it drops out and the service brake system comes up on the dash and the ABS & brake light on the dash come on. I know it is in the wiring. My 4.3 was cable throttle 5.3 is electric. Could any one tell me witch wires need to be hooked up. Should be from the old cruise control to the new PCM. The 4.3 was 2006. The 5.3 is 2005. HELP
Well the swap 2006 silverado 1500 W/T 4.3L to 5.3L is a very easy swap. All you need is engine,wiring harness,PCM,ac lines,both radiator hoses,heater hoses,and machine shop to make mounts for engine block(3/4" thick X 4" high X 6 1/2 " long) drilled and milled for mounting to block then move 1 1/16 " over and drill and tap for motor mounts. This will let you use the V-6 motor mounts and frame mounts with your V-8. Also you need to get a tee fitting 1/2" X 1/2" X 1/4" for the cooling line from throttle body to the over flow line from tank to radiator,then the O2 sensors are male plugs and the wiring harness is male plugs also, I used pins cut at 3/4" long and rubber tape then electrical tape to keep moisture proof.Also you have to get the electrical schematics to wire the cruise control. MAKES YOUR TRUCK NEW AGAIN, LEARN TO DRIVE ALL OVER
I do have one problem anti-lock brakes. The system works for about 75feet then it drops out and the service brake system comes up on the dash and the ABS & brake light on the dash come on. I know it is in the wiring. My 4.3 was cable throttle 5.3 is electric. Could any one tell me witch wires need to be hooked up. Should be from the old cruise control to the new PCM. The 4.3 was 2006. The 5.3 is 2005. HELP
Registered User
Joined: Feb 2017
Posts: 1
Likes: 0
I'm new here just need a little help Hey I have a 1997 gmc c1500 4.3 looking to do a 5.3 swap but don't know we're to start on it can anyone please help me and point me in the right direction . Also some guy told me in order to do that swap I would have to cut the frame is that true and where can I buy the best parts from I already have a motor and transmission from a 2002 Chevy Silverado
Thanks in advance for any help!!!!
Thanks in advance for any help!!!!
Registered User
Joined: Feb 2017
Posts: 1
Likes: 0
Swaping v6 vortec to v8 vortec I have a 1997 single cab short bed with manual 5 speed tranny and v6 vortec. I want to buy a donor truck with the 350 vortec and swap that into my '97 short wide. What all do I need to know and do besides swapping frame motor mounts and a bigger radiator?
Registered User
Joined: Jul 2017
Posts: 1
Likes: 0
Can anyone help me out?? I have recently done a V6 two V8 swap on a 2002 Silverado the motor that I swapped into it is a 2005 Yukon 6.0l now everything is all hooked up together all the plugs everything is plug-in except one plug from the engine harness to the chassis harness the engine harness is white The chassis harness connector is blue those two don't plug into each other because a different style plugs I don't know if the motor and the harness is too new for the trucks chassis harness or is there somehow I can overpass that plug if anyone can help me that be great thank you
Registered User
Joined: Jan 2019
Posts: 3
Likes: 0
Does anybody know if I can use the frame mounts and motor mounts from a v8 Silverado on my v6? I tried to Bolt the frame mounts from the v8 where the v6 frame mounts were and the passenger side fit but the driver’s side v8 frame mount was wider than the part where it’s supposed to mount on the frame. Can anybody help me solve this problem please?
the V6 frame mounts are completely diff than the V8 mounts. They have diff widths and spacing.
To install a V8 in a V6 Silverado u have to get the V8 frame mounts.
They have to come from the same style frame as well. 2wd frame needs 2wd mounts. 4x4 frame will need 4x4 mounts. They will not interchange.
I have done a few of these swaps over the years, so I know all the ins and outs! Pretty basic to swap. Get correct mounts, and everything else will swap right over.
Stock y-pipe will interchange, radiator will work, fuel setup will work with some tweaks, and the original v6 ecu will work with the correct tuning, and the V8 harness will plug and play. U will also need a v8 truck throttle cable.
To install a V8 in a V6 Silverado u have to get the V8 frame mounts.
They have to come from the same style frame as well. 2wd frame needs 2wd mounts. 4x4 frame will need 4x4 mounts. They will not interchange.
I have done a few of these swaps over the years, so I know all the ins and outs! Pretty basic to swap. Get correct mounts, and everything else will swap right over.
Stock y-pipe will interchange, radiator will work, fuel setup will work with some tweaks, and the original v6 ecu will work with the correct tuning, and the V8 harness will plug and play. U will also need a v8 truck throttle cable.
Registered User
Joined: Jan 2019
Posts: 3
Likes: 0
the V6 frame mounts are completely diff than the V8 mounts. They have diff widths and spacing.
To install a V8 in a V6 Silverado u have to get the V8 frame mounts.
They have to come from the same style frame as well. 2wd frame needs 2wd mounts. 4x4 frame will need 4x4 mounts. They will not interchange.
I have done a few of these swaps over the years, so I know all the ins and outs! Pretty basic to swap. Get correct mounts, and everything else will swap right over.
Stock y-pipe will interchange, radiator will work, fuel setup will work with some tweaks, and the original v6 ecu will work with the correct tuning, and the V8 harness will plug and play. U will also need a v8 truck throttle cable.
To install a V8 in a V6 Silverado u have to get the V8 frame mounts.
They have to come from the same style frame as well. 2wd frame needs 2wd mounts. 4x4 frame will need 4x4 mounts. They will not interchange.
I have done a few of these swaps over the years, so I know all the ins and outs! Pretty basic to swap. Get correct mounts, and everything else will swap right over.
Stock y-pipe will interchange, radiator will work, fuel setup will work with some tweaks, and the original v6 ecu will work with the correct tuning, and the V8 harness will plug and play. U will also need a v8 truck throttle cable.