Issue: Heat Shield Rattle - PIP3147 & PIP3195 - Chevy Colorado & GMC Canyon
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post #1 of 45 (permalink) Old 12-20-2004, 09:13 PM Thread Starter
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Issue: Heat Shield Rattle - PIP3147 & PIP3195

does anyone have the exact tsb for the colorado for the heat shield noise at 1700-2200 rpms? I told them one existed but they couldn't find one....also they couldn't hear the noise :(

matt


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Old subject:
Heat Shield Rattle....dealer says no noise and no such TSB

'04 Colorado Z71 LS 4x4
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post #2 of 45 (permalink) Old 12-21-2004, 07:51 PM
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Take a service person or manager with you to duplicate the noise. I did that so I would not get the "could not duplicate issue" crap. I think there is a TSB here somewhere, but you'll need to search for it.

If I can remember to, I'll look at my work order and see if they list a TSB. I doubt it as it was back a while, but I'll look anyway to see if it can help you some way. Good luck!

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post #3 of 45 (permalink) Old 12-27-2004, 12:47 AM
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My truck is making this noise and my dealer has done several things to try and get rid of it including the heat shield tsb, a new muffler and a new clutch disc. All three were recommended for my problem by the GM manuals as I understand. However I still have the noise and GM is deciding what they want to do with my situation. The GM district manager says that this is a problem that GM is having with some of the stickshift models. If yours is not a stick shift then your noise is more than likely different then mine.

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post #4 of 45 (permalink) Old 12-27-2004, 04:03 AM
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There are 2 TSB's for the issue! The idiot at the dealership is apparently deaf, dumb, blind, lazy, dishonest or all of the above.

The 2 issues are preliminary information bulletins.

Ken Deatrick
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post #5 of 45 (permalink) Old 12-27-2004, 04:05 AM
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Document ID# 1556728

Tinny Rattle Under Load Heat Shield - kw GMT355 clutch exhaust plate vibration noise manual transmission MA5 third fourth second first fifth gear #PIP3195 - (Oct 19, 2004)
Tinny Rattle Under Load Heat Shield

The following diagnosis might be helpful if the vehicle exhibits the symptom described in the PI.

Condition/Concern:
Vehicle may exhibit an exhaust heat shield type rattle which sounds like it is coming from the back of the cab in the driveline area. The concern will most likely occur under light load on a slight grade and may be worse as the vehicle warms up. The condition is most easily duplicated in 3rd or 4th gear at about 1800-2300 RPMs. This concern will only occur on vehicles equipped with a manual transmission.

Recommendation/Instructions:
Inspect for any obvious signs of loose exhaust heat shields. If none are found, inspect the clutch disc for loose dampening springs in the hub. If loose springs are found, replace the clutch disc.

Please follow this diagnosis process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed. If these steps do not resolve the condition, please contact GM TAC for further diagnostic assistance.

Models:
(04 Chevrolet Colorado) and (05 Chevrolet Colorado) and (04 GMC Canyon) and (05 GMC Canyon)
__________________________________________________ _________________________
Document ID# 1551315
04 3.5L L52 Colorado and Canyon - Exhaust Buzz Noise - kw accelerate GMT355 heat manifold noise rattle shield #PIP3147 - (Sep 23, 2004)
04 3.5L L52 Colorado and Canyon - Exhaust Buzz Noise
.

The following diagnosis might be helpful if the vehicle exhibits the symptom described in the PI.

Condition/Concern:
Some 2004 Colorado and Canyons equipped with the L52 engine and built prior to July 2004, may have an exhaust buzz at approximately 2100 RPM due to possible heat shield contact with exhaust manifold. This may be caused by a clearance issue between the exhaust manifold heat shield and the exhaust manifold. The condition can be corrected by bending the heat shield outward to provide approximately 10-12 mm of clearance. If you get a vehicle with this condition, please confirm adequate clearance of the heat shield and test drive.

Recommendation/Instructions:
n/a

Please follow this diagnosis process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed. If these steps do not resolve the condition, please contact GM TAC for further diagnostic assistance.

Models:
(04 Chevrolet Colorado) and (04 GMC Canyon)
__________________________________________________ _________________________

Ken Deatrick
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post #6 of 45 (permalink) Old 12-27-2004, 06:17 PM
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"Some 2004 Colorado and Canyons equipped with the L52 engine and built prior to July 2004, may have an exhaust buzz at approximately 2100 RPM due to possible heat shield contact with exhaust manifold. This may be caused by a clearance issue between the exhaust manifold heat shield and the exhaust manifold. The condition can be corrected by bending the heat shield outward to provide approximately 10-12 mm of clearance."

kdeatrick, does it specify where exactly on the manifold the contact is occurring? if its a simple fix as that, I'd rather not bother going to the dealer.
post #7 of 45 (permalink) Old 12-28-2004, 04:56 AM
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I cut and pasted both bulletins in full.
Some others can tell you for sure. I know one person used stell wool I think to cushion it. In my opinion that may not be the best as it could become a fire hazard. I think most just mentioned that the dealer bent the shield back in place.

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post #8 of 45 (permalink) Old 12-30-2004, 11:25 AM Thread Starter
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cool thanks for the bulletins :)

I think my was made after july 2004 though....when they did the TSB search they did it by VIN...so who knows. I may just go and do it myself.

oh and it is an auto with the I5 lil stinky.

matt

EDIT: well actually my truck was made 11/03 so it should be covered and I got my oil changed today and they said well we have to hear it to perform teh TSB :(

all I can say is I am asking them to bend a peice of aluminum 10 mm's at most....they act like I am asking for them to drop the tranny or something.

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post #9 of 45 (permalink) Old 12-30-2004, 01:47 PM
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matt_p, it's time to try a new dealer. I have found that there is a lot of variation between dealerships.

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post #10 of 45 (permalink) Old 12-30-2004, 03:21 PM Thread Starter
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so I just went in and had the guy go for a test ride and listen to it......he said that isn't the heat sheild. He said that is internal engine noise.....I asked him what that meant and he said the tech would look at it. I told him I test drove alot of these trucks at several dealerships and none of them made this noise. It is just funny that it happens at 2000 rpm's at slow speeds during accelartion.

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post #11 of 45 (permalink) Old 12-30-2004, 03:37 PM
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Just crawl under and bend it yourself... I did it 2 months ago and its been fine since. Its right under the front passender side door (on my crewcab) Just don't burn yourself on the exhaust.

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post #12 of 45 (permalink) Old 12-30-2004, 09:16 PM
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i thought i had the same prblem...it turned out to be the jack behind the seat ratteling, i tightened it up and it fixed it, it happened again i just threw an old shirt back there...good as new...mabey im a retard but when i first heard it i thought it was a heat sheild or exhaust but wasnt

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post #13 of 45 (permalink) Old 12-30-2004, 11:59 PM
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Quote:
Originally Posted by Stepdaddy
i thought i had the same prblem...it turned out to be the jack behind the seat ratteling, i tightened it up and it fixed it, it happened again i just threw an old shirt back there...good as new...mabey im a retard but when i first heard it i thought it was a heat sheild or exhaust but wasnt

Mine was the front pass side husky molded splash guard, loose screws, duhhhhhhhh! So don't feel bad!

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post #14 of 45 (permalink) Old 12-31-2004, 10:31 AM Thread Starter
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well I don't know what it is but at 2k rpm it sounds like a lawn mower.

who knows I will see what they say on monday...I got an appt. setup to get these things fixed/checked out.

1) radio replaced----broken hour button.
2) rattle noise at 2k rpm
3) hot/cold knob doesn't got to hot unless you crank on it
4) get new pcm update to fix rough idle.
5) fix hood shake when driving down the highway.

oh and there is another thing that I am trying to figure out first before I take it into the dealership.

matt

'04 Colorado Z71 LS 4x4
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post #15 of 45 (permalink) Old 12-31-2004, 11:49 AM
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matt_p,

The temp. knob will not go the entire way to the right, although it ison full heat on mine at least. Many have mentioned this. I don't recall if any had it actually corrected. I think they adjusted it.

The hood shake is a simple fix of turning the rubber bumpers.

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post #16 of 45 (permalink) Old 12-31-2004, 12:52 PM
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I took mine in for the exhaust heat shield buzzing and things really got crossed up. They tried to tell me that my bug shield was causing the noise!

To their credit, however, I belive there is a bulletin on bug shields redirectig the air flowing over the truck that does cause a whistling sound...at least they researched the problems. The thing is...I never took it in for whistling issues. So they got it all wrong.

In any case I had to drive around the service manager until he heard the buzz and it is fixed now. They bent the heat shield accoriding to the correct bulletin.

My temp knob doesn't go all the way to the right either, but it does turn over to the hot side where it is all red and there is no blue left on the dial.

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post #17 of 45 (permalink) Old 12-31-2004, 01:38 PM Thread Starter
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Yeah I saw the bumpers for the hood...I will have them do it since I have to bring it in anyways and if I pay that much money for a new truck well then I want them to fix it not me. Even if it is just turning a knob :)

oh and the heat thing is just the same....mine works fine but if they can adjust it a bit then cool....if not then that is fine as well.

This is the heat shield correct? Just want to make sure I was pulling on the correct thing.....bablake made it sound like it is under the truck by the passenger door? If this is not the heat shield can someone point me in the right dirrection?



and this is where I was pulling on it. I also pulled on it a little to the right of this as well.....it didn't fix the noise.





matt

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post #18 of 45 (permalink) Old 12-31-2004, 04:56 PM
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I had the best luck by doing the following:

1) Remove all 4 10mm Bolts that hold the heat sheild on.

2) Slide the heat sheild a far forward as it would go.

3) Concentrate on bending the area arround the o2 sensor outward.

4) Replace and tighen all the bolts back up.

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post #19 of 45 (permalink) Old 07-25-2005, 04:49 PM
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Are these TSBs for only 2004 models? I did a search on NHTSA's website for my 2005 and it was not listed. Searching for 2004 TSBs, it showed up.

I am experiencing the 2000 rpm buzz on my 2005 and I am taking it in tomorrow to get it fixed. I just wanted to know if I could give them the TSB if it would apply to a 2005 as well.

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post #20 of 45 (permalink) Old 08-05-2006, 01:04 PM
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Could someone please get the text for

bulletin #06-07-31-001

Just had my my balance shafts, chain and tensioner replaced as well as my clutch plate. The problem was a nasty 2000 - 3000 RPM rattle. Still driving the truck to see how it worked out, and will update after a few days. Info on the TSB would be appreciated.

Thanks.

05 Colorado Z85 LS Reg Cab I5 M5
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