1990 silverado swap

[lt1truck]

Hey im new here and thought this was a cool site so here goes nothin haha!

http://i225.photobucket.com/albums/dd182/brentcole5/engine8.jpg
When i got the engine

http://i225.photobucket.com/albums/dd182/brentcole5/1010081646.jpg
after the port work done by myself and all cleaned up and media blasted

http://i225.photobucket.com/albums/dd182/brentcole5/1010081649.jpg
a fresh deck on the heads

http://i225.photobucket.com/albums/dd182/brentcole5/1010081649a.jpg
http://i225.photobucket.com/albums/dd182/brentcole5/1010081824a.jpg

[grn95t/a]

welcome...and sweet build

[lt1truck]

http://i225.photobucket.com/albums/dd182/brentcole5/engine4.jpg
http://i225.photobucket.com/albums/dd182/brentcole5/engine4-1.jpg
http://i225.photobucket.com/albums/dd182/brentcole5/engine7.jpg
http://i225.photobucket.com/albums/dd182/brentcole5/DSC01361.jpg
http://i225.photobucket.com/albums/dd182/brentcole5/1387465677_l.jpg
http://i225.photobucket.com/albums/dd182/brentcole5/293020012_l.jpg
the same truck my senior year
http://i225.photobucket.com/albums/dd182/brentcole5/truck1.jpginterior shot

[KissMyWhtSS]

I already forgot, is it 2wd or 4wd? What's the purpose? Weekend cruiser? DD? Offroad? Race track?

Any specs on the heads/cam/estimated hp #s?

[lt1truck]

the truck has gone through alot with me, the pic where its all white is old. i hit a tree head on when i was 18 going about sixty hence the black front end.

[Z28pr0jekt]

I actually like the color on the intake and such... those headers are crazyyy looking especially the driver's side, what's the approx. weight on that thing? so you opened the heads a bit, what are you using for a cam?

[lt1truck]

I already forgot, is it 2wd or 4wd? What's the purpose? Weekend cruiser? DD? Offroad? Race track?

Any specs on the heads/cam/estimated hp #s?

haha its 2wd, im just building it for fun, i plan on taking it to the track during the summer and stuff but its more so to just have some fun and to shut up ricers and mustangs, the heads are stock lt1 that i ported, polished and gasket matched with the intake, the cam is a lt4 hotcam :laugh::metal:

[lt1truck]

I actually like the color on the intake and such... those headers are crazyyy looking especially the driver's side, what's the approx. weight on that thing? so you opened the heads a bit, what are you using for a cam?

it used to weigh 3600#'s with me in it and a half a tank of gas, but that was with an all iron 350 in it, the lt1 is considerably lighter with the aluminum heads and intake. the cam is just the lt4 hotcam

[KissMyWhtSS]

haha its 2wd, im just building it for fun, i plan on taking it to the track during the summer and stuff but its more so to just have some fun and to shut up ricers and mustangs :laugh::metal:
Definitely, keep the exhaust kinda quiet for added surprise. :secret:

[Z28pr0jekt]

it used to weigh 3600#'s with me in it and a half a tank of gas, the cam is just the lt4 hotcam


That's a lot lighter than I would've guessed

[KissMyWhtSS]

That's a lot lighter than I would've guessed
Seems pretty impressive to me. Those OBS are pretty heavy. Thick sheet metal. I think my the '96 I sold was a couple weeks ago was about 4400lbs.

[lt1truck]

That's a lot lighter than I would've guessed
yeah well the bed is fiberglass and its the base model truck, with crank windows, no power anything for that matter and just less garbage that makes a truck comfortable i guess but yeah i was surprised too :shiner:

[lt1truck]

Seems pretty impressive to me. Those OBS are pretty heavy. Thick sheet metal. I think my the '96 I sold was a couple weeks ago was about 4400lbs.

was it an extended cab because those are big time heavy

[lt1truck]

Definitely, keep the exhaust kinda quiet for added surprise. :secret:
oh yeah its getting electric cutouts for that sneak attack:devil:

[KissMyWhtSS]

was it an extended cab because those are big time heavy
'96 Silverado 1500 ECSB, Vortec 5.0L, 2WD. I think the '99 Z71 I'm drivin now is about as heavy.... The 4WD adds some weight but they cut some weight out of the truck when they designed it (aluminum heads, thinner sheet metal, etc.)

[lt1truck]

'96 Silverado 1500 ECSB, Vortec 5.0L, 2WD. I think the '99 Z71 I'm drivin now is about as heavy.... The 4WD adds some weight but they cut some weight out of the truck when they designed it (aluminum heads, thinner sheet metal, etc.)
is the z71 your driving now an nbs with gen III engine?

[KissMyWhtSS]

is the z71 your driving now an nbs with gen III engine?

Yeah, it's a '99 Silverado LT Z71 with a 5.3L Vortec. I know, I'm a traitor on a Gen II site with a Gen III :laugh:

http://i207.photobucket.com/albums/bb257/kiss_my_ss/dad/silverado.jpg

[lt1truck]

nice i have a 2000 z71 single cab with a 5.3, but we still stay tru to the LT's haha but yeah those weigh alot more than the 88-98 truck for some reason, my single cab weighs around 4000#'s

[chevy42083]

Welcome to the site.... nice to see more LT1 trucks :D

[lt1truck]

Welcome to the site.... nice to see more LT1 trucks :D
glad to be here, and to be part of the truck gang! although its a work in progress. by the way, did you use a factory lt1 harness. I ask because im torn between buying a stand alone harness or using a modified stock harness. i think with my application the stand alone harness will work out better because i can use my factory guage senders i.e. oil pressure sensor, water temp, voltage and such.

[hempkat94z]

Welcome to the site and nice build.

[lt1truck]

thanks!!!

[BLOWNDFIZ]

Nice looking build-up. Are the headers for Impala's (B-Body's), they look like them.

[chevy42083]

I used a painless performance harness. You can look at a .pdf of their instructions on their website to get an idea of the difficulty and what is involved... it's pretty easy. Mine uses the stock truck's wiring for gauges, except the speedo.. I ran the factory cluster wire to the little wire labled "vss output" on the painless harness.

I basically went through the stock trucks wiring with some pin-outs and pulled each un-needed wire one at a time. That wasn't so much fun.

There are some S-10 guys that swear by looking at schematics, and "rebuilding" a camaro's harness. They delete what they don't want, and extend what they need to extend. Sounds like a headache to me :D

Oh, painless offers two harnesses, one is standard, one is extended to place the pcm under the dash ;)

Oh, and I feel ya on the wrecked, so now black front-end :jest:
http://s-seriesforum.com/albums/album59/DSCN1057.sized.jpg

[lt1truck]

Welcome to the site and nice build.

thanks!

[lt1truck]

I used a painless performance harness. You can look at a .pdf of their instructions on their website to get an idea of the difficulty and what is involved... it's pretty easy. Mine uses the stock truck's wiring for gauges, except the speedo.. I ran the factory cluster wire to the little wire labled "vss output" on the painless harness.

I basically went through the stock trucks wiring with some pin-outs and pulled each un-needed wire one at a time. That wasn't so much fun.

There are some S-10 guys that swear by looking at schematics, and "rebuilding" a camaro's harness. They delete what they don't want, and extend what they need to extend. Sounds like a headache to me :D

Oh, painless offers two harnesses, one is standard, one is extended to place the pcm under the dash ;)

Oh, and I feel ya on the wrecked, so now black front-end :jest:


i think im going to go painless then because i dont want the pcm in the engine compartment for a clean look plus i got the money for painless so why not! oh nice front end:shiner: are trucks are all bruised up:metal:

[lt1truck]

Nice looking build-up. Are the headers for Impala's (B-Body's), they look like them.

their for a like a 97 vortec truck, i found them in a junk yard for $20 and they look custom made too but i could be wrong

[lt1truck]

A lttle update! i got a harness from a 95 impala ss, im almost done hooking it up and figuring it all out. I got the fuel pump working and all the guage harness mated with the new harness and working!!

i just have to rework the fuel lines somehow so thats happening tomorrow and im gonna try to fire it up!:metal: Oh and chevy42083, i was wondering how you tackled your fuel lines, im scratching my head as to what i should do about it.

I also had a question about my lifters. I adjusted the rockers cold before i put the engine in, and im sure the lifters were bled out due to them sitting for a month or so. i soaked them in oil before i put them in but it has sat for another three months, im all scatter brained right now so bear with me but my question is, will i have the rockers adjusted too tight since the lifters were most likely bled down, and if so what would you reccomend i do about it? Thanks for reading my novel!!! and for the help:hail:

[lt1truck]

Nobody wants to chime in here? any ways i figured out the fuel lines and got the motor to start yesterday, but it would only run for 2 maybe 3 seconds then shut down. I was thinking that since im using a caprice harness and computer thst the pass key thingy isnt letting it keep running by shutting off fuel or spark.

I dont know much aboiut it so if somebody has some expierience with that i would greatly apprieciate any advice!!!

[chevy42083]

I think you are right. I didn't have an issue with it, but not sure if my PCM or painless performance harness solved that issue.

The correct term is VATS... vehicle anti-theft system. Maybe that will help you find something in your searches.

[lt1truck]

I thought that if vats was indeed working, it wouldnt even crank or anything, because i got it to run, just nor stay running, but like i said i dont know much about it.

[chevy42083]

Like i said, I don't know much about it... just what I've read in other threads.

Ignore the thread title "built 4.3 swap / auto to T56"... he went with a fullsize 350 :D
post number 1215 should be videos of what his truck was doing when passlock/VATS wasn't letting it run.
http://www.s-seriesforum.com/forum/showthread.php?p=1699854&highlight=VATS#post1699854

[lt1truck]

:cheers:I got it running today, thanks for all the help and such, ill post some vids when i get my girlfriends camera

[chevy42083]

So, what was it? Always nice to know the solution in case it pops up in someone else's swap. :)

[lt1truck]

Well, i did a ton of research and a guy on ls1lt1 had the same problem with the vats/passkey bull, and he ended up getting a vats module from a 93 pontiac bonneville, and since there is absolutely no camaro's or caprice's in my local junk yards, i did the same and found about ten of those cars. I pulled the vats module from one of them, hooked the dark blue fuel enable wire to the dark blue on the module, gave it 12v power, 12v key power and ground. since i didnt have the original key for that car, i got an adjustable resistor and started trying each of the fifteen resistance values that gm used and found it was lucky number thirteen, made a resistor pluged it in and vroom it went!!!!

[lt1truck]

oh and be very glad you didnt have to deal with this it was a major pain in the arse!

[lt1truck]

http://i225.photobucket.com/albums/dd182/brentcole5/kkkk-2.jpg All finished up lookin pretty good.

http://i225.photobucket.com/albums/dd182/brentcole5/truck33333.jpg

getting dynoed!, put down 322hp and 331tq and ran out of injector!! wasted money on 26# ones, haha now i need 32#'s

[Jhulk]

So on a scale of 1 to 10 how hard was this swap? I have a 93 silverado i want to do this swap to.

[Colossus]

Was it injector or pump? You should still have some injector. Glad to see the Hulk made it on.

[lt1truck]

Was it injector or pump? You should still have some injector. Glad to see the Hulk made it on.

Turned out to be the injectors, my pump is a 93 vette pump. i didnt know but i had 1993 injectors and in 93 everything was 22# @ 43psi, i put 33# svo red tops in and made a little more power but during the second dyno run, my opti took a dump, im getting a high res code and a low res code so the timing wasnt advancing like it should.

[lt1truck]

So on a scale of 1 to 10 how hard was this swap? I have a 93 silverado i want to do this swap to.

on a scale of one to ten i would say about an 8 or nine, i only say that because i took a 94 caprice harness and graphted it with mine but if you got a stand alone harness i would say maybe a 6, but thats relative to my knowledge you know, you may consider it a 3/10 or a 12/10 you know.

[Jhulk]

Ok thanks, sounds like it might be a fun project then.

[jlwhite0]

I am also dropping an LT1 in my 1992 1/2 ton that has a NV3500. which flywheel clutch and pressure plate combo were you able to use? :hmm: :cry:

[Ccreddell]

my opti took a dump

This is why Im using a TPI intake and using a Vortec distributor....

[Ccreddell]

Any updates on this? Hows it running? Its been 4 years or so, how has it held up? How do you like the LT4 hot cam?