malekmb

iTrader: (1)

I remember seeing a thread about it. Some one posted a paper/document from GM on how to clean it. So if some one has it can they post? Please.

jsteele90

iTrader: (13)

brake cleaner

Todd157k

iTrader: (5)

Seafoam. Goes into the vacuum line... smokes like a mf afterwards. (for about 10 mins). Search for tons of threads on it.

MjMaro

iTrader: (11)

Like Todd said, I would look up Seafoam. There is a good write-up on how to do it. i believe the "Seafoam Deep Creep" is what works well in the intake manifold to get some of the grime off and it is petroleum based so no harm to the engine, but you want to change your oil not too long after you do it, good luck.

ae13291

iTrader: (8)

if the intake is out use a pressure washer

BlackNiteWS6

iTrader: (2)

GM dealerships sell what they call " top engine cleaner" you can use that. Not
sure the cost.

TORCHD 02 TA

iTrader: (39)

you're on the right track. But use Deep Creep made by Seafoam. Spray it liberally into the intake manifold let it sit for about 20 mins.

01ssreda4

iTrader: (96)

+1 for deep creep. cost 7 bucks.