4 Different 5.3l Options.

[FREAKENHYE]

I just check Chevy.com and looked at the options for the 08 Silverado and saw something intresting,

 

It stated 4 different 5.3L engines.

 

1 Iron block 5.3L with AFM

 

1 Aluminum block 5.3L with AFM

 

1 Iron block 5.3L with AFM flex fuel

 

1 Aluminum block 5.3L with AFM with flex fuel

 

now how do we know if we have the aluminum blocks or the iron blocks, can anyone help me?

 

And did they have the same block options for the 07 and how can you tell?

 

http://www.chevrolet.com/silverado/features/ scroll down to engines

[silveradocoa]

8th digit of the vin....also remember alum is non-ferrous right? ;)

[punmax]

What's the difference between iron/aluminum?

[hubbycap]

What's the difference between iron/aluminum?

 

 

Aluminum is lighter and a magnet will stick to iron.

[CalixEros]

The block depends on your model. EC got iron block with Al spare wheel, CC got Al block with steel spare, and I'm not sure what the RC got. 2007 has 3 additional engines, gen III Al, iron, and flex fuel (for the classic).

[FREAKENHYE]

The block depends on your model. EC got iron block with Al spare wheel, CC got Al block with steel spare, and I'm not sure what the RC got. 2007 has 3 additional engines, gen III Al, iron, and flex fuel (for the classic).

 

 

I got a 07 New Body Style 5.3L with AFM EXT CAB

[Zembonez]

Did you check it?

[FREAKENHYE]

Did you check it?

 

 

Not yet to lazy, and to dark, truck is about 200 feet away.

 

But ya forgot Zembones said the color,

 

 

Black means irion and silver ( aluminum color ) means aluminum block.

[buckjim]

didn't you guys figure that out when you bought it, i mean when i bought mine i knew all the options in my truck including everything about the engine not just the size and horse power rating, check the rpo code list in your glove box.

[FREAKENHYE]

didn't you guys figure that out when you bought it, i mean when i bought mine i knew all the options in my truck including everything about the engine not just the size and horse power rating, check the rpo code list in your glove box.

 

 

I had to buy it, brother gave me a good deal, 24k out the door. It had a 5.3L didnt look into the block and what is made from. But i did know about the other options.

[Starrman]

you have your insurance card close by? Usually those have the VIN listed on it....or any registration paperwork you might have filed in a desk or something? Look up the motor code from the VIN

[FREAKENHYE]

you have your insurance card close by? Usually those have the VIN listed on it....or any registration paperwork you might have filed in a desk or something? Look up the motor code from the VIN

 

 

Im trying to figure this out, i looked at it but i dont know whats the option code is for what. It would have been simple if someone said the option code on the vin, but Zembones idea is better. Thanks for all your help guys.

[Starrman]

pinned at the top of this forum is a "various GM links" thread that has a link to decoding VIN info

 

http://service.gm.com/dealerworld/vincards/

[slammed08swb]

Isnt it on the window sticker? I thought mine said 5.3 iron block on my 08. I will look tonight when I get home

[chitownpete]

One of these days I hope GM simplifies things as it makes life easier for everybody and will save them money. Way to many variations for its own good.