Odd Issues On A New Sierra

SSnakeAce · May 21, 2008

So, my parents just bought a used 2007 GMC Sierra 1500 SLT with the VortecMax engine and the Max Trailering Pack. 13500 miles and under $30,000 so not a bad deal.

Just a couple of strange little issues we've noticed that I hoped someone else might have seen as well.

First, this truck has the in-dash navigation system. It works fine, but we notice that when the truck is off, you can hear the drive, not sure if it's the DVD drive or the drive behind the screen, making a noise like it's trying to search the disc. It does this regardless of whether there is a cd in the drive or not, but I've never checked the drive behind the screen.

Second, this has only happened once, this morning, and my mom was the only one in it to hear it, and we havent' been able to reproduce it. She says that while she was driving it today, she started hearing a 'popping' noise which she described as like a 'popcorn maker' whenever the vehicle was in motion, and was accompanied by a strong smell of antifreeze. She said it sounded like it was in the front right area of the truck, so it sounds like an issue with the axle or something. All the gauges read fine, and I didn't notice anything when I drove it when she got home.

Third, and this one is probably something simple like a clog, but we noticed last night that the front windshield defogger doesn't seem to operate on the passenger side. There is air blowing, but not nearly as strongly as the driver side.

jrrod2004 · May 21, 2008

So, my parents just bought a used 2007 GMC Sierra 1500 SLT with the VortecMax engine and the Max Trailering Pack. 13500 miles and under $30,000 so not a bad deal.

Just a couple of strange little issues we've noticed that I hoped someone else might have seen as well.

First, this truck has the in-dash navigation system. It works fine, but we notice that when the truck is off, you can hear the drive, not sure if it's the DVD drive or the drive behind the screen, making a noise like it's trying to search the disc. It does this regardless of whether there is a cd in the drive or not, but I've never checked the drive behind the screen.

Second, this has only happened once, this morning, and my mom was the only one in it to hear it, and we havent' been able to reproduce it. She says that while she was driving it today, she started hearing a 'popping' noise which she described as like a 'popcorn maker' whenever the vehicle was in motion, and was accompanied by a strong smell of antifreeze. She said it sounded like it was in the front right area of the truck, so it sounds like an issue with the axle or something. All the gauges read fine, and I didn't notice anything when I drove it when she got home.

Third, and this one is probably something simple like a clog, but we noticed last night that the front windshield defogger doesn't seem to operate on the passenger side. There is air blowing, but not nearly as strongly as the driver side.

Service Information

2007 Chevrolet Silverado - 2WD | Sierra, Silverado (VIN C/K) Service Manual | Document ID: 2094062 #06-08-44-034B: Information on Noise from Navigation Radio - Normal Operating Characteristics - (Apr 8, 2008)

Subject:Information on Noise from Navigation Radio -- Normal Operating Characteristics

Models:2007-2009 Cadillac DTS, Escalade, Escalade ESV, Escalade EXT, SRX

2007-2009 Chevrolet Avalanche, Silverado, Suburban, Tahoe

2007-2009 GMC Sierra, Yukon, Yukon Denali, Yukon XL, Yukon Denali XL

2007-2009 HUMMER H2

This bulletin is being revised to add the 2009 model year and update the models to include HUMMER H2. Please discard Corporate Bulletin Number 06-08-44-034A (Section 08 -- Body and Accessories).

Some customers may comment that there is unusual or unwanted noise coming from the navigation radio. This noise has been described as a fan sound or hearing a disc spinning.

Source of fan sound -- It is normal for the radio fan to run when the vehicle is turned on and for up to three minutes after the vehicle has been turned off and the driver's door has been opened or closed.

Disc spinning sound -- This is a normal operational sound. This is caused by the map disc spinning behind the tilt screen. It is a normal operation after the RKE is used to unlock the vehicle or when the driver's door has been opened. This noise will also be heard during vehicle operation and up to three minutes after the vehicle has been turned off and driver's door has been opened and closed.

Do not replace the radio as the described conditions are normal operating characteristics.

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.

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jrrod2004 · May 21, 2008

Service Information

2007 Chevrolet Silverado - 2WD | Sierra, Silverado (VIN C/K) Service Manual | Document ID: 2076008 #08-08-61-001A: EI08027 - Underbody Noise, Pop, Creak, Groan, Clunk, Squeak, Body Mount (Engineering Information) - (Mar 6, 2008)

Subject:EI08027 -- Underbody Noise, Pop, Creak, Groan, Clunk, Squeak, Body Mount (Engineering Information)

Models:2007-2008 Cadillac Escalade, Escalade ESV, Escalade EXT

2007-2008 Chevrolet Avalanche, Silverado, Suburban, Tahoe

2007-2008 GMC Sierra, Yukon, Yukon Denali, Yukon XL

Attention: Proceed with this bulletin ONLY if the customer has commented about this concern AND the EI number is listed in GMVIS. If the customer has not commented about this condition or the EI does not show in GMVIS, disregard the bulletin and proceed with diagnostics found in published service information. THIS IS NOT A RECALL - refer to Service Bulletin 04-00-89-053A for more detail on the use of Engineering Information bulletins.

This bulletin is being revised to correct information under the Warranty Information section. Please discard Corporate Bulletin Number 08-08-61-001 (Section 08 -- Body and Accessories).

Condition

Important: If the customer did not comment about this condition, do not proceed with this bulletin.

Some customers may comment on a noise coming from the underbody of the vehicle.

Cause

GM Engineering is attempting to determine the root cause of this condition. GM has a need to obtain information about the diagnosis and repair. Use the following procedure to diagnose and repair the vehicle. Note the information on the repair order as necessary.

Describe the noise (i.e. pop, creak, etc.) and the conditions in which the noise can be duplicated.
Is the vehicle equipped with running boards -- If yes -- are they GM Accessory, or aftermarket? If a GM Accessory - proceed to step 3. If an aftermarket running board or the running board is mounted using the body mount bolt:
• Remove the running boards and test drive the vehicle to determine if the concern has been corrected.

• If the noise was eliminated or reduced, reinstall the running boards and proceed to step 4.

• If the noise is still present, reinstall the running boards and proceed to step 3.
If it is suspected that the noise is coming from a body mount, do the following steps:
3.1. Install the J 39570 - Chassis Ears to the frame rail at or near the body mounts.

3.2. Test drive the vehicle to identify which mount is suspect.

3.3. Measure the torque of the suspect mount(s).

3.4. Remove the suspect mount. Drive the vehicle and determine if the noise has been eliminated.

3.5. Inspect the body mount spacer/bracket on the body side. The body mount spacer/bracket on the body side should be flat. Note whether the metal is flat or if the mount appears to be "pulled through".
Contact engineer Gary Banasiak at 586-492-8074 and provide him with diagnostic information.

Warranty Information

For vehicles repaired under Engineering direction, use:

Labor Operation

Description

Labor Time

E9453 *

Underbody Noise -- Engineering Information

0.5 hr

Add

To replace body mount

0.3 hr

To replace each additional body mount

0.3 hr

* This labor operation number is for bulletin use only. This number will not be published in the Labor Time Guide.

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.

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jrrod2004 · May 21, 2008

Service Information

2007 Chevrolet Silverado - 2WD | Sierra, Silverado (VIN C/K) Service Manual | Document ID: 2023596 #PIT4513: Pop Or Tick Type Noise From Left Dash Area Over Small Bumps - keywords body carrier clunk drivers fender floor front instrument left mount rattle running boards suspension - (Oct 3, 2007)

Subject:Pop or Tick Type Noise From Left Dash Area Over Small Bumps

Models:2007-2008 Cadillac Escalade, Escalade ESV, Escalade EXT

2007-2008 Chevrolet Avalanche, Silverado, Suburban, Tahoe

2007-2008 GMC Sierra, Yukon, Yukon Denali, Yukon XL, Yukon Denali XL

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

Condition/Concern:

Some customers may state that there is a pop or tick type noise from the left front dash area over bumps. The noise may occur when backing out of a parking spot or going over small speed bumps in parking lots. The noise is worse when the vehicle is cold and may go away when the vehicle gets hot outside.

If you experience this concern and have exhausted all resources, the concern may be caused by a loose spot weld that attaches the "L" bracket from the left inner fender panel to the front bulkhead (See Photo Below)

(1) L Bracket without bolts.

Recommendation/Instructions:

To resolve the concern, add 3 bolts with nuts between the left fender bracket and the fender inner panel. This fender bracket is spot welded to the inner panel and attaches to the front-of-dash with 2 nuts (studs thru the dash panel). These 3 bolts/nuts were added through existing holes in the bracket and fender. ( See Photo Below )

(2) L Bracket with bolts.

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.

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jrrod2004 · May 21, 2008

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.

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jrrod2004 · May 21, 2008

Service Information

2007 Chevrolet Silverado - 2WD | Sierra, Silverado (VIN C/K) Service Manual | Document ID: 1865409 #06-08-44-031: Buzz, Pop or Whine Noise from Any Speaker (Secure Wiring Harness) - (Oct 4, 2006)

Subject:Buzz, Pop, or Whine Noise from Any Speaker (Secure Wiring Harness)

Models:2007 Cadillac Escalade, Escalade ESV, Escalade EXT

2007 Chevrolet Avalanche, Silverado, Suburban, Tahoe

2007 GMC Sierra, Yukon, Yukon XL, Yukon Denali

with Speakers, Premium Audio w/ Amplifier (RPOs UQA or UQS)

Condition

Some customers may comment on a buzz, whine, distortion, pop, or static noise coming from any speaker.

Cause

The radio low level signal drain wires may be too long.

Correction

Remove the floor console bezel assembly (cup holder).
Remove the wire harness connector retaining clips to view wire harness and connector C211.
Inspect the bare silver colored drain wires at C211 to see if the wires are touching adjacent terminals. Refer to the above graphic.
If the wires are too long, pull back the excess wire and secure the slack to the harness using electrical tape.
If securing the harness does not correct the condition, refer to SI for further diagnosis and repair.
Install the harness connector clips.
Install the floor console bezel assembly (cup holder).

Warranty Information

For vehicles repaired under warranty, use:

Labor Operation

Description

Labor Time

N6632

Wiring and/Or Connector-Vehicle Entertainment - Repair Or Replace

Use Published Labor Operation Time

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.

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SSnakeAce · May 21, 2008

Thanks Mike, the nav system one was great to hear, and I'll have to check into the other ones.

jrrod2004 · May 21, 2008

Service Information

2007 Chevrolet Silverado - 2WD | Sierra, Silverado (VIN C/K) Service Manual | Document ID: 2094101 #PIP4020C: Groan Clunk Or Bump Noise From Launch Or At Stop - keywords moan pop squawk start - (Apr 8, 2008)

Subject:Groan, Clunk or Bump Noise From Launch Or At Stop

Models:2007-2008 Chevrolet Silverado

2007-2008 GMC Sierra

This PI was superseded to update Condition/Concern. Please discard PIP4020B.

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

Condition/Concern:

Some customers may comment that their new body style full size pickup makes a groan, clunk or bump noise at parking lots speeds on launch or with light to medium braking. Braking to a complete stop can force the propshaft slip yoke forward into the transfer case while the vehicle rebounds slightly backwards after stopping its momentum and create this noise. This noise may also be due to fuel movement in the fuel tank when not completely full.

Note: This PI does not apply to the Silverado or Sierra classic versions.

Recommendation/Instructions:

Root cause may be the interface between the rear propshaft slip yoke and the transfer case or transmission output shaft splines or fuel movement in the fuel tank. To isolate if the concern is the slip yoke or fuel slosh and not a brake noise the dealer may attempt to duplicate while coasting with the transmission in neutral and braking to a stop. If a groan noise is gone while braking in neutral the noise is the slip yoke related. Dealers may lube the slip yoke splines with TransGel (J36850) to help reduce the noise.

If a clunk noise continues after completing the above, the noise has now been isolated to the fuel movement in the tank please make no repair attempts at this time as this noise is considered a operating characteristic.

A Field Product Report should be submitted - refer to the latest version of Corporate Bulletin Number 02-00-89-002F.

Lubricating the slip yoke may only be a temporary repair and at this time engineering is investigating this concern. Please do not replace any prop shaft or transfer case components at this time.

Note: This PI does not apply to the Silverado or Sierra classic versions.

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 · May 21, 2008

Service Information

2007 Chevrolet Silverado - 2WD | Sierra, Silverado (VIN C/K) Service Manual | Document ID: 2042037 #PIT4485A: Rattle Popping Snapping Type Noise From Center IP Air Deflectors - keywords A/C air blower conditioning deflector duct heater high HVAC instrument panel vent whistle - (Dec 3, 2007)

Subject:Rattle/Popping/Snapping Type Noise From Center IP Air Deflectors

Models:2007-2008 Chevrolet Avalanche, Silverado, Suburban, Tahoe

2007-2008 GMC Sierra, Yukon, Yukon Denali, Yukon XL, Yukon Denali XL

This PI was superseded to update the areas of concern. Please discard PIT4485.

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

Condition/Concern:

Some customers may comment about a rattle/popping/snapping type noise from the center IP air deflectors when the blower is on. In most cases, the noise is from the left center air deflector. This condition may be due to the air flow door being loose and vibrating. If the thumb wheel, to close off the air flow, is slightly rotated the noise will be eliminated or reduced.

Recommendation/Instructions:

To correct this concern, remove the center air outlet deflectors. With the airflow door in the full open position, to allow air flow, install a piece of black foam tape (obtained locally) along the top and bottom of the deflector housing so it just touches the air flow door. The foam tape should be positioned on the side of the air flow door so it does not obstruct the door from closing. With the foam tape properly installed, the air flow door will slightly contact the foam tape when in the full open position, preventing the door from vibrating.

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 · May 21, 2008

I cannot diagnose it for ya, but that is all the relevant information that I can find for your YMM, it should help with tracking down the noise, as for the antifreeze, you may want to get under the truck and look for any leaks or get near the firewall to see if there is any leaks. As for the defroster not blowing, I couldn't tell you anything on that. Take it in for some warranty work.

Lincoln30 · May 21, 2008

Sorry for the thread-jack...

Hey Mike,

Are there any bulletins that you can post for rear door rattles on the 08 crew cab???

TIA

ZZ327 · May 21, 2008

that noise you say is like a CD player searching for a track might be the small fan behind the radio unit. I hear them sometimes if its quiet enough

aj923 · May 21, 2008

Sorry for the thread-jack...
Hey Mike,

Are there any bulletins that you can post for rear door rattles on the 08 crew cab???

TIA

i noticed that you were wondering about the rear door rattles? i took mine to the dealer and asked about this.. they put on some kind of new door sealant.. when i was driving down the road it sounded like all my doors were rattling. it is some kind of seal trim stuff. that goes around the top of the doors.. i dont really know how to describe it..

AJ

Zembonez · May 22, 2008

Sorry for the thread-jack...
Hey Mike,

Are there any bulletins that you can post for rear door rattles on the 08 crew cab???

TIA

i noticed that you were wondering about the rear door rattles? i took mine to the dealer and asked about this.. they put on some kind of new door sealant.. when i was driving down the road it sounded like all my doors were rattling. it is some kind of seal trim stuff. that goes around the top of the doors.. i dont really know how to describe it..

AJ

HOLY SHEEEIT... Mike is on a roll.

jrrod2004 · May 22, 2008

Sorry for the thread-jack...
Hey Mike,

Are there any bulletins that you can post for rear door rattles on the 08 crew cab???

TIA

Sorry, I was out for most of the day and am barely getting back in (Lots of PMs that I answered, if I missed you, let me know).

Service Information

2008 Chevrolet Silverado - 2WD | Sierra, Silverado (VIN C/K) Service Manual | Document ID: 2094913 #06-08-64-035E: Squeak/itching Noise in Upper Door Area (Install Squeak Reduction Tape) - (Apr 9, 2008)

Subject:Squeak/Itching Noise In Upper Door Area (Install Squeak Reduction Tape)

Models:2007-2008 Cadillac Escalade, Escalade ESV, Escalade EXT

2007-2008 Chevrolet Avalanche, Silverado, Suburban, Tahoe

2007-2008 GMC Sierra, Yukon, Yukon XL, Yukon Denali, Yukon Denali XL

This bulletin is being revised to add the pickup models, remove the part number and change the procedure. Please discard Corporate Bulletin Number 06-08-64-035D (Section 08 -- Body & Accessories).

Condition

Do This

Don't Do This

Install 3M™ Squeak Reduction Tape

Do NOT replace the roof drip weatherstrip.

Some customers may comment on a squeaking or itching noise in the upper door area when driving.

Cause

This condition may be caused by the roof drip weatherstrip to door frame contact. This could occur at any or all of the doors.

Correction

Install 3M™ Squeak Reduction Tape. Clean the top of all door frames and install 3M™ Squeak Reduction Tape 5430, P/N 06356.

Parts Information

Purchase 3M™ Squeak Reduction Tape locally.

Material Allowance is $10.71 (USD) per roll.

Two rolls per vehicle are needed.

Part Number

Description

06356

3M™ Squeak Reduction Tape 5430

Warranty Information

For vehicles repaired under warranty, use:

Labor Operation

Description

Labor Time

C9845*

Install Squeak Reduction Tape

0.3 hr

*This labor operation number is for bulletin use only. This number will not be published in the Labor Time Guide.

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