Canadian Hummer Club Forums

[quote name='dwaxman1' timestamp='1317818389' post='31074']

Great idea Kevin... I will for sure do that!! I also had a P0300 too, guess my O2 sensors didn't like all that water either.. this has long since cleared, a good rip on the road took care of that...



Kevin, if you have a photo, that would be a big help of your MOD...





and as for the boat ramp... that is a excellent idea...you know we are gonna have Hummers in the water everywhere from now on!

[/quote]





Here is the only link I could find that would allow me to show the document without $$$$



http://www.justanswer.com/uploads/SKeel ... _knock.pdf



The document doesn't include H2 specifically but our engines are part of it. It also doesn't mention the removal of the 2 pieces of foam, but due to my experience at GM, this eliminates any future problems!



Hope this helps!



Kev



#02-06-04-023A: Audible Spark Knock (Detonation),

MIL Illuminated, DTC P0332 Set (Replace Rear Bank

Knock Sensor and RTV Area Around Sensor) - (Jun 14,

2002)

Subject: Audible Spark Knock (Detonation), MIL Illuminated, DTC

P0332 Set (Replace Rear Bank Knock Sensor and RTV Area

Around Sensor)

Models: 1998-2002 Chevrolet Camaro, Corvette

1998-2002 Pontiac Firebird

with 5.7L Engine (VIN G -- RPO LS1)

1999-2002 Chevrolet Silverado, Suburban, Tahoe

2002 Chevrolet Avalance

1999-2002 GMC Sierra, Yukon, Yukon XL

2002 Cadillac Escalade, Escalade EXT

with 4.8L, 5.3L or 6.0L Engine (VINs V, T, Z, N, U -- RPOs LR4, LM7, L59,

LQ9, LQ4)

This bulletin is being revised to add Cadillac Escalade and Cadillac Escalade EXT to the

Models. Please discard Corporate Bulletin Number 02-06-04-023 (Section 6 --

Engine/Propulsion System).

Condition

Some customers may comment on a mild to severe engine ping (commonly referred to as spark

knock), usually worse during acceleration and/or an illuminated MIL. Upon investigation, the

technician may find DTC P0332 set.

Cause

This condition may be the result of corrosion of the rear bank knock sensor due to water

intrusion into the sensor cavity. This condition is more apparent on vehicles in which customers

frequently wash the engine compartment.

Correction

Replace the rear bank knock sensor and build a dam (wall) around the sensor using RTV to

divert water away from the sensor. Use the procedure and part number listed below.

Remove the intake manifold. Refer to the Intake Manifold Replacement procedure in the

Engine Controls sub-section of the appropriate Service Manual.

•

Document ID: 893793 Page 1 of 3

http://gsi.xw.gm.com/si/showDoc.do?docS ... 93&from=sm 4/19/2009

Remove the wiring harness assembly from • the knock sensor.

• Remove the rear bank knock sensor.

• Install the new rear bank knock sensor.

Tighten

Tighten the knock sensor to 20 N—m(15 lb ft).

• Install the wiring harness assembly to the knock sensor.

Document ID: 893793 Page 2 of 3

http://gsi.xw.gm.com/si/showDoc.do?docS ... 93&from=sm 4/19/2009

Apply a bead of RTV silicone sealant approximately 9 mm (3/8 in) wide and 6 mm (1/4 in)

high along the outside edge of the ridge on the engine block valley cover around the rear

bank knock sensor. DO NOT form a complete circle. Leave the rear section open as shown.

•

From the underside of the intake manifold, completely remove the rear intake manifold

seal (foam material).

•

Install the intake manifold. Refer to the Intake Manifold Replacement procedure in the

Engine Controls sub-section of the appropriate Service Manual.

•

Document ID: 893793 Page 3 of 3

http://gsi.xw.gm.com/si/showDoc.do?docS ... 93&from=sm 4/19/2009

wow... thanks Kevin...

Mud is something that is easily contended with. The only trouble I had was coming down the 400 with it being unlit, my mirrors muddy and my windows muddy changing lanes was a challenge. Windows down, rock and roll back and forth looking for headlights; signal on, inch over to the lane I want and wait to hear horns if anyone was there! <img src='http://www.canadianhummerclub.com/forum ... oflmao.gif' class='bbc_emoticon' alt=':rotflmao:' />



I stopped at my mechanics about something I talked to him on friday about and they surprised me with a wash!



I will have to give it a good once over on the weekend but the majority was all taken care of for me! <img src='http://www.canadianhummerclub.com/forum ... lleyes.gif' class='bbc_emoticon' alt=':rolleyes:' />

[quote name='Montana' timestamp='1317850694' post='31106']

Mud is something that is easily contended with. The only trouble I had was coming down the 400 with it being unlit, my mirrors muddy and my windows muddy changing lanes was a challenge. Windows down, rock and roll back and forth looking for headlights; signal on, inch over to the lane I want and wait to hear horns if anyone was there! <img src='http://www.canadianhummerclub.com/forum ... oflmao.gif' class='bbc_emoticon' alt=':rotflmao:' />



I stopped at my mechanics about something I talked to him on friday about and they surprised me with a wash!



I will have to give it a good once over on the weekend but the majority was all taken care of for me! <img src='http://www.canadianhummerclub.com/forum ... lleyes.gif' class='bbc_emoticon' alt=':rolleyes:' />

[/quote]



you are the best!! this is the funniest thing I have read in a long time!

i spent $15 at the car wash. Needed more but the change machine was broken. I still have to pull all the grass and weeds out from under the truck and in the suspension, and wash the engine compartment. otherwise it is almost back to being my street queen. Not complaining though, haven't had that much fun in a long time. <img src='http://www.canadianhummerclub.com/forum ... ght_on.gif' class='bbc_emoticon' alt=':right_on:' />

we need a coin car wash as a club sponsor... anyone know anyone that owns one in the areas??

[quote name='dwaxman1' timestamp='1317870554' post='31139']

we need a coin car wash as a club sponsor... anyone know anyone that owns one in the areas??

[/quote]

Would that not be the ultimate , or what!?

Okay guys you all talk about washing the engine, this is new and uncharted territory for me. I lift the hood and is there some secret way I should be doing this like the club's secret dance and handshake? Is there something I should avoid spraying? Cause quite frankly as much as I love my mechanics, I really dont want to spend that much time with them <img src='http://www.canadianhummerclub.com/forum ... oflmao.gif' class='bbc_emoticon' alt=':rotflmao:' />

[quote name='Montana' timestamp='1317892646' post='31146']

Okay guys you all talk about washing the engine, this is new and uncharted territory for me. I lift the hood and is there some secret way I should be doing this like the club's secret dance and handshake? Is there something I should avoid spraying? Cause quite frankly as much as I love my mechanics, I really dont want to spend that much time with them <img src='http://www.canadianhummerclub.com/forum ... oflmao.gif' class='bbc_emoticon' alt=':rotflmao:' />

[/quote]



Don't look at me...I would love to leave it dirty all the time, to avoid any electrical issues.. but my mechanic complains sometimes, thanks Steve...so I will not advise...I would say... leave it dirty!

Avoid spraying too much water on the fuse block (drivers side), make sure the cover is on! As Kevin has said, the H2's have a known issue with the Knock Sensors getting wet and corroding. These are in the top center of the engine, under the intake manifold. If you haven't replaced them and followed the bulliten to resolve the issue, also avoid spraying water there. I would also avoid hi pressure spraying of the alternator and air conditioning pump. Other than that you should be pretty safe.

It doesn't have to be spotless under there (if you want it that way, get it professionally shampood and put it in a garage, permanately <img src='http://www.canadianhummerclub.com/forum ... oflmao.gif' class='bbc_emoticon' alt=':rotflmao:' /> ), just get the grit and mud out ... until next time!<img src='http://www.canadianhummerclub.com/forum ... ght_on.gif' class='bbc_emoticon' alt=':right_on:' />