1980 truck with a 03 motor and trans - The 1947 - Present Chevrolet & GMC Truck Message Board Network

kris's66lwb · 09-21-2010, 03:58 PM

ive been wanting more from my truck im putting in a 700r4 to start what i want to end up with is a 4.8 f.i. and 4l60e from a 2003 silvarado what all do i need and how much do yall think it will cost i knw i need the engine and tranny and harnesses and the ecu to begin anything else can you think of

**Clyde65** · 09-21-2010, 04:46 PM

engine mounts, fuel pump, filter, fuel lines, accesories like starter etc., hoses, pcm flash, harness tweek, drive shaft adj ( maybe)....all I can think of....

probably $750-1000 if you mod ur own harness. NOT including the eng/trans!

87chevy.com · 09-21-2010, 06:50 PM

your looking at alot more than that a pcm tune is 400 ish ... looking closer to 1500 if you dont go aftermarket harness.
clint

STOCKISH · 09-21-2010, 08:50 PM

I used fuel injection 1987 tanks, in tank pumps, vette filter regulator, engine mount adapter brackets, harness and tune, 91 suburban cluster, and lots of little odds and ends. It will be well worth it in the end but it's not cheap.

Juiced06GTO · 09-22-2010, 07:26 AM

I am into my swap for probably just over 4k including the cost of the truck and motor, but I did everyhting myself.

**N2TRUX** · 09-22-2010, 08:46 AM

I am curious as to why you would spend the money for the swap and only do a 4.8? Find a 5.3 at least.

kris's66lwb · 09-22-2010, 10:25 AM

Why do i need to flash the pcm ? And i like the 4.8 better than the 5.3 ive had both motors and the 4.8 still has plenty of power and gets decent gas milage im driving this truck everyday i want it to be a lil more effecint and potent

Juiced06GTO · 09-22-2010, 12:08 PM

The pcm needs to be flashed to remove VATS (Vehicle Anti Theft System) and any of the emissions equpment that is removed from the harness. If VATS is not removed, the truck will not run.

kris's66lwb · 09-22-2010, 01:15 PM

dont they have standalone pcms from like howe or edilbrock for this pourpse ? and cant i just wire in somesort of anti theft system to it to make it think its the correct one i dont mind that i should just by a totaled truck and just harvest parts from oit

STOCKISH · 09-22-2010, 01:55 PM

It's cheaper to run the stock computer, and get it flashed than get a new standalone ecu. I paid $550 for a new custom built standalone harness and the ecu flash from the guys at lt1swap.com. Only requires 3 wires to hook up to run too!

kris's66lwb · 09-22-2010, 07:58 PM

so your harness is coustom but the necu is chevy factory with an updated ats

Juiced06GTO · 09-22-2010, 08:51 PM

If you are handy with wiring diagrams it is easy enough to modify the harness yourself. I took my time and it took me probably 20hrs worth of work to get it done. I also have a bit of experience with these ls motors so that helped a bit, and I have HP tuners which allows me to tune the factory GM PCM's.

87chevy.com · 09-22-2010, 10:34 PM

you can mod the harness yourself, the information is out there on the how to mod the harness. If you go one wire at a time, its not a huge deal. if you look at all the wires at once your gonna be over whealmed. go one wire at a time and write what each wire does, make a chart, and design your own fuse box. wire it into a junkyard fuse box with new terminals. Thats exactly what I did.
clint

kris's66lwb · 09-23-2010, 11:43 AM

sounds easy im pretty good with diagrams

09-21-2010, 03:58 PM	#1
kris's66lwb resident wrencher Join Date: Dec 2006 Location: ramona california Posts: 720	1980 truck with a 03 motor and trans ive been wanting more from my truck im putting in a 700r4 to start what i want to end up with is a 4.8 f.i. and 4l60e from a 2003 silvarado what all do i need and how much do yall think it will cost i knw i need the engine and tranny and harnesses and the ecu to begin anything else can you think of

09-21-2010, 04:46 PM	#2
Clyde65 1965 Chevy C10, 2005 4.8L/4l60 Join Date: Aug 2004 Location: DFW Texas Posts: 8,541	Re: 1980 truck with a 03 motor and trans engine mounts, fuel pump, filter, fuel lines, accesories like starter etc., hoses, pcm flash, harness tweek, drive shaft adj ( maybe)....all I can think of.... probably $750-1000 if you mod ur own harness. NOT including the eng/trans! __________________ Clyde65 Rebuild of Clyde http://67-72chevytrucks.com/vboard/s...84#post8338184 69 Aristocrat Lo Liner build http://67-72chevytrucks.com/vboard/s...84#post7561684 *support our troops!* Last edited by Clyde65; 09-21-2010 at 04:46 PM.

09-21-2010, 06:50 PM	#3
87chevy.com BMW & ASE Master Certified Join Date: Feb 2004 Location: Houston, Texas Posts: 1,261	Re: 1980 truck with a 03 motor and trans your looking at alot more than that a pcm tune is 400 ish ... looking closer to 1500 if you dont go aftermarket harness. clint __________________ 1987 Silverado - L83 5.3 w/ 6L80e ,A/C,P/W,P/L,TILT, HID projectors, Wilwood C-10 Pro Spindles w/ 2018 silverado front brakes & C-5 Corvette Rear Disc Brakes 1999 BMW 528i - 5.7 LS1 w/ 4l60e, Ford 8.8 IRS w31 spline posi & FX-r projector retrofit New project: 2006 BMW x5 6cyl AWD to L83 6l80e 4wd to 2WD / RWD A poor man buy's it twice finally got my domain name back, 87chevy.com.... site rework in progress

09-21-2010, 08:50 PM	#4
STOCKISH Formerly- 1972SuperCheyenne Join Date: Oct 2008 Location: Wake Forest NC Posts: 5,782	Re: 1980 truck with a 03 motor and trans I used fuel injection 1987 tanks, in tank pumps, vette filter regulator, engine mount adapter brackets, harness and tune, 91 suburban cluster, and lots of little odds and ends. It will be well worth it in the end but it's not cheap. __________________ --Josh My Build Thread:http://67-72chevytrucks.com/vboard/s...d.php?t=799218 A good crossthread is better than Loctite any day. Life is not about what you have, but who you have to share it with.

09-22-2010, 07:26 AM	#5
Juiced06GTO Registered User Join Date: Jul 2010 Location: Sutton, MA Posts: 130	Re: 1980 truck with a 03 motor and trans I am into my swap for probably just over 4k including the cost of the truck and motor, but I did everyhting myself.

09-22-2010, 08:46 AM	#6
N2TRUX Happy to be here Join Date: Mar 2000 Location: Cypress, TX Posts: 39,023	Re: 1980 truck with a 03 motor and trans I am curious as to why you would spend the money for the swap and only do a 4.8? Find a 5.3 at least. __________________ Follow me on Facebook and Instagram @N2trux.com Articles- "Jake" the 84 to 74 crewcab "Elwood" the77_Remix 85 GMC Sierra "Scarlett" "Refining Sierra"

09-22-2010, 10:25 AM	#7
kris's66lwb resident wrencher Join Date: Dec 2006 Location: ramona california Posts: 720	Re: 1980 truck with a 03 motor and trans Why do i need to flash the pcm ? And i like the 4.8 better than the 5.3 ive had both motors and the 4.8 still has plenty of power and gets decent gas milage im driving this truck everyday i want it to be a lil more effecint and potent

09-22-2010, 12:08 PM	#8
Juiced06GTO Registered User Join Date: Jul 2010 Location: Sutton, MA Posts: 130	Re: 1980 truck with a 03 motor and trans The pcm needs to be flashed to remove VATS (Vehicle Anti Theft System) and any of the emissions equpment that is removed from the harness. If VATS is not removed, the truck will not run.

09-22-2010, 01:15 PM	#9
kris's66lwb resident wrencher Join Date: Dec 2006 Location: ramona california Posts: 720	Re: 1980 truck with a 03 motor and trans dont they have standalone pcms from like howe or edilbrock for this pourpse ? and cant i just wire in somesort of anti theft system to it to make it think its the correct one i dont mind that i should just by a totaled truck and just harvest parts from oit

09-22-2010, 01:55 PM	#10
STOCKISH Formerly- 1972SuperCheyenne Join Date: Oct 2008 Location: Wake Forest NC Posts: 5,782	Re: 1980 truck with a 03 motor and trans It's cheaper to run the stock computer, and get it flashed than get a new standalone ecu. I paid $550 for a new custom built standalone harness and the ecu flash from the guys at lt1swap.com. Only requires 3 wires to hook up to run too! __________________ --Josh My Build Thread:http://67-72chevytrucks.com/vboard/s...d.php?t=799218 A good crossthread is better than Loctite any day. Life is not about what you have, but who you have to share it with. Last edited by STOCKISH; 09-22-2010 at 01:55 PM.

09-22-2010, 07:58 PM	#11
kris's66lwb resident wrencher Join Date: Dec 2006 Location: ramona california Posts: 720	Re: 1980 truck with a 03 motor and trans so your harness is coustom but the necu is chevy factory with an updated ats

09-22-2010, 08:51 PM	#12
Juiced06GTO Registered User Join Date: Jul 2010 Location: Sutton, MA Posts: 130	Re: 1980 truck with a 03 motor and trans If you are handy with wiring diagrams it is easy enough to modify the harness yourself. I took my time and it took me probably 20hrs worth of work to get it done. I also have a bit of experience with these ls motors so that helped a bit, and I have HP tuners which allows me to tune the factory GM PCM's.

09-22-2010, 10:34 PM	#13
87chevy.com BMW & ASE Master Certified Join Date: Feb 2004 Location: Houston, Texas Posts: 1,261	Re: 1980 truck with a 03 motor and trans you can mod the harness yourself, the information is out there on the how to mod the harness. If you go one wire at a time, its not a huge deal. if you look at all the wires at once your gonna be over whealmed. go one wire at a time and write what each wire does, make a chart, and design your own fuse box. wire it into a junkyard fuse box with new terminals. Thats exactly what I did. clint __________________ 1987 Silverado - L83 5.3 w/ 6L80e ,A/C,P/W,P/L,TILT, HID projectors, Wilwood C-10 Pro Spindles w/ 2018 silverado front brakes & C-5 Corvette Rear Disc Brakes 1999 BMW 528i - 5.7 LS1 w/ 4l60e, Ford 8.8 IRS w31 spline posi & FX-r projector retrofit New project: 2006 BMW x5 6cyl AWD to L83 6l80e 4wd to 2WD / RWD A poor man buy's it twice finally got my domain name back, 87chevy.com.... site rework in progress

09-23-2010, 11:43 AM	#14
kris's66lwb resident wrencher Join Date: Dec 2006 Location: ramona california Posts: 720	Re: 1980 truck with a 03 motor and trans sounds easy im pretty good with diagrams



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