Hood Adjustment

duscarter · March 30, 2008

I bought my 2000 Denali used, and it seems the hood is out of adjustment. It was not noticable until I hit high speeds. Air gets under it and causes it to "bounce".

Is there a tip to get the adjustment correct?

Thanks

jrrod2004 · March 31, 2008

Here is some info that may help:

Service Information

2000 GMC Truck Yukon Denali | Escalade, Pickup (Classic), Tahoe (Classic), Yukon Denali (VIN C/K) Service Manual | Document ID: 751213 #00-08-63-007: Hood Flutter or Vibration (Add Sealing Material) - (Sep 27, 2000)

Subject:Hood Flutter or Vibration (Add Sealing Material)

Models:1999-2000 Cadillac Escalade

1999-2000 GMC Yukon Denali

Condition

Some customers may comment that the hood sheet metal flutters or vibrates when driving at various speeds.

Cause

Additional sealing material is required between the hood inner and outer panels.

Correction

Before applying additional sealing material, verify that the hood latch and the two rubber outboard stops are adjusted properly. If these are adjusted properly or, if after adjusting, the flutter or vibration still exists, apply additional sealing material using the following procedure.

Open the hood.
Remove the hood insulation pad.
Apply gumdrop size amounts of 3M® Ultrapro™ Urethane Seam Sealer, # 8360 (white) or # 8361 (gray), or equivalent between the hood inner and outer panels at the locations shown (1).
Apply gumdrop size amounts of sealer into the three openings in the hood inner panel (2).
Reinstall the hood insulation pad.Important: Do not drive the vehicle with the hood open or only on the secondary latch as described in the next step.
Allow the sealer to cure for two hours with the hood open or latched only on the secondary latch.

Warranty Information

For vehicles repaired under warranty, use:

Labor Operation

Description

Labor Time

B1530

Insulator, Hood - Replace

0.3 hr

Add

For applying additional sealer between the inner and outer hood panels

0.1 hr

GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information.

WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION

saxdogg · March 31, 2008

M.,

Is there anything like this for the nbs trucks? I notice my food flutter in high winds....not really a big deal, but annoying and cheap looking.

JP

jrrod2004 · March 31, 2008

lemme look

jrrod2004 · March 31, 2008

nothing really coming up with the hood search key in the GMT900 series, but I swear I thought I saw one a long time ago...

jrrod2004 · March 31, 2008

This may be related:

http://www.gm-trucks.com/forums/index.php?...icle&id=107

saxdogg · March 31, 2008

thanks for the info

Zembonez · March 31, 2008

thanks for the info

There was a TSB out on the 07 Sierra for hood "flapping" at highway speed that was fixed by using some kind of bonding between the skin and inner supports. Not sure if it is for the 08s as well.

jrrod2004 · March 31, 2008

That is more or less of what I remember reading, but I cannot find it on DealerWorld

jrrod2004 · March 31, 2008

Much credit to Z, the key word is flap/rattle, not flutter (at least in dealerworld), here is some more info:

Service Information

2007 Chevrolet Silverado - 2WD | Sierra, Silverado (VIN C/K) Service Manual | Document ID: 2000969 #PIT4469: Rattle Type Noise From Hood Or Instument Panel Area - keywords bump cowl dash hinge hood hvac instrument ip ipc itch noise pad panel pop rattle turn twist - (Jul 31, 2007)

Subject:Rattle Type Noise From Hood Or Instrument Panel Area

Models:2007-2008 Chevrolet Silverado

2007-2008 GMC Sierra

The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

Condition/Concern:

Some customers may comment of a rattle type noise from the instrument panel or hood/cowl area. This concern could be caused by a lack of lube at the hood hinge area, as shown below.

Recommendation/Instructions:

To repair this concern lube the hood hinge with white lithium grease.

Please follow this diagnostic or repair 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.

GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information.

WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION

jrrod2004 · March 31, 2008

Service Information

2007 Chevrolet Silverado - 2WD | Sierra, Silverado (VIN C/K) Service Manual | Document ID: 1879361 #PIT4224: Rattle From Front Of Dash - keywords bump click cowl hood ip ipc suspension steer under upper - (Dec 20, 2006)

Subject:Rattle From Front Of Dash

Models:2007 Chevrolet Silverado

2007 GMC Sierra

The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

Condition/Concern:

Some owners may comment on a rattle from the dash area. This rattle could be caused by the engine cover contacting the front of dash/cowl area. The engine cover is retained at the rear by two "C" style retainers. An engine harness that is not properly seated in its U-channel (shown below) can obstruct the engine cover from going into its "C" retainers. This will push the rear of the engine cover up and contact the front of dash/cowl area (shown below).

Recommendation/Instructions:

To correct this concern fully seat the engine harness into the U-channel (shown below) and reinstall the engine cover making sure it is retained properly in the "C" retainer.

Please follow this diagnostic or repair 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.

GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information.

WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION

duscarter · April 21, 2008

Thanks for the great info M. ! I forgot that I posted until today. Been spending most of my time on boat forums getting ready for the season. I will try to do it myself this weekend.

WSLN 6 · April 24, 2008

Thanks for the great info M. ! I forgot that I posted until today. Been spending most of my time on boat forums getting ready for the season. I will try to do it myself this weekend.

Wow great info! Is there anything like this for a 2003 Escalade? The corners of my hood "flap" up and down while driving. Thanks!

jrrod2004 · April 24, 2008

I think that it is the same thing, mine 'flaps', 'flutters' at the corners (maybe something to do with the aftermarket bug shield, but it is only noticeable in certain light, I will look though

jrrod2004 · April 24, 2008

just double checked for the Escalade, but there is nothing (unless I am using the incorrect keywords again), but I used everyone that is on this thread. might be latched properly, but not tightly (my own thought)