Need Part Number Please

**Tickwomp** · 01-15-2009, 01:37 PM

I picked up a LS6 intake for a great price, but need to pick up the coolant lines. Anyone have the part numbers?

Thanks in advance!

**0rion** · 01-15-2009, 02:13 PM

it's hard for me to read the numbers in the manual but this is what they look like to me

plugs- 1256788
front pipe-12568478
rear bolts-11516425
front bolts-12561089

the numbers are kind of smudged looking but that looks right. Thunder racing carries the pipe and block off plugs.
http://www.thunderracing.com/catalog...&sid=122#P3602

**Tickwomp** · 01-15-2009, 03:37 PM

Thanks! I read that many folk simply plug the rears and go with the front crossover. Could one use another front in the rear?

**0rion** · 01-15-2009, 03:38 PM

you can do that but the rear plugs are cheap.....I would do it right the first time.

**Tickwomp** · 01-15-2009, 04:08 PM

Thanks! I definetely want to do this right!!

This mod should hold me until I can save up for headers...

**Tickwomp** · 01-16-2009, 06:58 AM

Originally Posted by 0rion

it's hard for me to read the numbers in the manual but this is what they look like to me

plugs- 1256788
front pipe-12568478
rear bolts-11516425
front bolts-12561089

the numbers are kind of smudged looking but that looks right. Thunder racing carries the pipe and block off plugs.
http://www.thunderracing.com/catalog...&sid=122#P3602

GM parts numbers are:

Coolant Plugs - 12602540
coolant Gaskets - 12551933
Front Coolant Pipe - 12602544

**0rion** · 01-16-2009, 07:17 AM

Originally Posted by Tickwomp

GM parts numbers are:

Coolant Plugs - 12602540
coolant Gaskets - 12551933
Front Coolant Pipe - 12602544

I have the parts manual cd's and those were the numbers it had on those......not sure why they're not correct buy you're right, the numbers I have arent' correct.

**Tickwomp** · 01-16-2009, 08:06 AM

Originally Posted by 0rion

I have the parts manual cd's and those were the numbers it had on those......not sure why they're not correct buy you're right, the numbers I have arent' correct.

No problem, thanks for trying to help. I caught a break when I call Cheverolet parts. Dude answered in 2 rings and I described what I was trying to do, and he gave the numbers in less than 5 minutes. Oh yeah, and they had everything in stock!!! Looks like I'll be able to pull this off tomorrow after all. Even better, the weather here in Dallas is improving too.

**2001NBMZ28** · 01-16-2009, 10:29 AM

Don't know why GM changes part numbers all the time, maybe because of different suppliers or something? For example: If they haven't changed it again, the current PN for the 01-02 Fbody LS6 intake is 88894339 (formerly 88890524, 88890523 and 12561184 which came on my car).

**qwk93ta** · 01-21-2009, 07:45 AM

Originally Posted by 2001NBMZ28

Don't know why GM changes part numbers all the time, maybe because of different suppliers or something? For example: If they haven't changed it again, the current PN for the 01-02 Fbody LS6 intake is 88894339 (formerly 88890524, 88890523 and 12561184 which came on my car).

88894339 is the part number for the LS6 I just bought off of Ebay.

**sutie** · 07-18-2009, 12:12 AM

how many of the gaskets with p/n: 12551933 do i need for the swap. i just bought the crossover tube and the plugs,(X2). and what other gaskets do i need for the swap?