5.7 or 5.3 which is better ????

uxb101 · February 22, 2007

my 99 yukon needs a motor and im wondering if a 5.3 will fit, it has a 5.7 now,and should i buy a rebuilt or a used motor ,is the 5.3 any good ???

mini1 · February 23, 2007

Buy a whole new truck. Problem solved.

silveradoHO · February 23, 2007

There's really not much difference. I had a 97 silverado with the 5.7, and now have a 05 with the 5.3 and both are great motors. Off the line they feel about the same to me, although the 05 is a Z71, so it's a little heavier and has bigger tires than th 97, which was 2wd. A 5.3 would fit, but I say stick with the 5.7 because you'll have less problems with the computer. Since the motor is going to be out anyway, you could easily have a 5.7 built to put out more power than a stock 5.3.

uxb101 · February 23, 2007

this section is ask the gm technician ........not ask the smart ass section.........ok sweetie.........now go wash dadies truck

Mark_in_Tulsa · February 23, 2007

this section is ask the gm technician ........not ask the smart ass section.........ok sweetie.........now go wash dadies truck

He just made a sarcastic remark. He didn't attack you or offend you. No need to attack his sexuality or age.

And yes this is the GM tech section. The section where the GM Techs answer technical questions that you would take your truck into the dealer for. Not opinion questions about what motor to put in.

Oh and the amount of money and time it would take to put in a 5.3, it would be worth just buying a new rig.

uxb101 · February 23, 2007

this section is ask the gm technician ........not ask the smart ass section.........ok sweetie.........now go wash dadies truck

He just made a sarcastic remark. He didn't attack you or offend you. No need to attack his sexuality or age.

And yes this is the GM tech section. The section where the GM Techs answer technical questions that you would take your truck into the dealer for. Not opinion questions about what motor to put in.

Oh and the amount of money and time it would take to put in a 5.3, it would be worth just buying a new rig.

so your saying buy a brand new yukon???? for what $60000 or spend $1500 for a rebuild....... what are you new at this..........ask the technician...... not ask the liberal ......dont you have a yoga class to go to

mini1 · February 23, 2007

this section is ask the gm technician ........not ask the smart ass section.........ok sweetie.........now go wash dadies truck

He just made a sarcastic remark. He didn't attack you or offend you. No need to attack his sexuality or age.

And yes this is the GM tech section. The section where the GM Techs answer technical questions that you would take your truck into the dealer for. Not opinion questions about what motor to put in.

Oh and the amount of money and time it would take to put in a 5.3, it would be worth just buying a new rig.

Agree. The thing is 8 years old and most likely in horrible condition (considering that the engine is well....dead). As I said before, it really isn't worth it to put in a new engine. Break what you have got for parts and sell those. Get something newer. I'll go wash MY truck now, thank you...............smart ass!!!!!!!!!!!

uxb101 · February 23, 2007

this section is ask the gm technician ........not ask the smart ass section.........ok sweetie.........now go wash dadies truck

He just made a sarcastic remark. He didn't attack you or offend you. No need to attack his sexuality or age.

And yes this is the GM tech section. The section where the GM Techs answer technical questions that you would take your truck into the dealer for. Not opinion questions about what motor to put in.

Oh and the amount of money and time it would take to put in a 5.3, it would be worth just buying a new rig.

Agree. The thing is 8 years old and most likely in horrible condition (considering that the engine is well....dead). As I said before, it really isn't worth it to put in a new engine. Break what you have got for parts and sell those. Get something newer. I'll go wash MY truck now, thank you...............smart ass!!!!!!!!!!!

do all the girls CALL YOU MINI_1.....or may be the boys do.........you dont even change your own oil .............take a hike mini man........ take mark your boy with you

carneyman · February 23, 2007

this section is ask the gm technician ........not ask the smart ass section.........ok sweetie.........now go wash dadies truck

He just made a sarcastic remark. He didn't attack you or offend you. No need to attack his sexuality or age.

And yes this is the GM tech section. The section where the GM Techs answer technical questions that you would take your truck into the dealer for. Not opinion questions about what motor to put in.

Oh and the amount of money and time it would take to put in a 5.3, it would be worth just buying a new rig.

Agree. The thing is 8 years old and most likely in horrible condition (considering that the engine is well....dead). As I said before, it really isn't worth it to put in a new engine. Break what you have got for parts and sell those. Get something newer. I'll go wash MY truck now, thank you...............smart ass!!!!!!!!!!!

do all the girls CALL YOU MINI_1.....or may be the boys do.........you dont even change your own oil .............take a hike mini man........ take mark your boy with you

dude, take a chill...he's giving you sound advice while not being an a$$ about it.

uxb101 · February 23, 2007

this section is ask the gm technician ........not ask the smart ass section.........ok sweetie.........now go wash dadies truck

He just made a sarcastic remark. He didn't attack you or offend you. No need to attack his sexuality or age.

And yes this is the GM tech section. The section where the GM Techs answer technical questions that you would take your truck into the dealer for. Not opinion questions about what motor to put in.

Oh and the amount of money and time it would take to put in a 5.3, it would be worth just buying a new rig.

Agree. The thing is 8 years old and most likely in horrible condition (considering that the engine is well....dead). As I said before, it really isn't worth it to put in a new engine. Break what you have got for parts and sell those. Get something newer. I'll go wash MY truck now, thank you...............smart ass!!!!!!!!!!!

do all the girls CALL YOU MINI_1.....or may be the boys do.........you dont even change your own oil .............take a hike mini man........ take mark your boy with you

dude, take a chill...he's giving you sound advice while not being an a$$ about it.

dont call me dude...........sound advice?????? buy a new truck because my motors gone....wake up ..are you guys for real....my truck is mint just needs a motor...so i should just call a tow truck and scrap it and go to the dealership and buy a new one ....im one of those guys that fix things ...i dont mind geting my hands dirty............im not a pencil pushing desk jockey like some people on here,I AM CANADIAN

thecraft · February 23, 2007

Piss on you. If you talk to everyone like that, especially those who are helping you, I hope they beat the living crap out of you.

Take the 5.7

carneyman · February 23, 2007

Piss on you. If you talk to everyone like that, especially those who are helping you, I hope they beat the living crap out of you.

Take the 5.7

agreed.

uxb101 · February 23, 2007

Piss on you. If you talk to everyone like that, especially those who are helping you, I hope they beat the living crap out of you.

Take the 5.7

another one ........this fourm is full of you guys i hope they beat the living crap out of you ...........what are you 10years old......i asked for imput on the 5.7 and the 5.3 .............thats all and all i get are smart ass remarks from a bunch of clowns like you if you have no coment then get lost

Tucson_02Silverado · February 23, 2007

D@MM WHAT A BUNCH OF PI55-BABIES......I'm suprised Wingnut hasn't already banned some people

swapping an SBC GEN III/IV series engine into a SBC GEN I v2 truck is a major project. Harness, computer, accessories. It's been done by many others before. Just ain't cost effective unless you have got a line on a GEN III/IV really really really cheap with harness and computer. Most of the low mileage ones that would be available most likely are the "drive by wire" type meaning that with the engine, harness, computer, the accellerator pedal had better been gotten as well.

1. Basic rebuild the 5.7

2. Performance rebuild the 5.7

3. swap with a 300HP GM crate 5.7

4. swap with a GM crate HT383 'smog-legal' package designed for the 99-classic and earlier

uxb101 · February 23, 2007

THANK YOU SO MUCH...........goin to go with #2 ........thanks again