When doing the 3-point maneuver into a parking space I heard a pop only once.

Sounds like tension or the suspension unbinding?

It happens when starting to back into the spot right after shifting from drive into reverse,

And with the steering still turned.

<o:p> </o:p>

I did just have an alignment done a few days ago, but today is the first time I heard it.

Coincidence or something else?

<o:p> </o:p>

Any suggestions what to look at?

I get a pop every morning (almost) when backing into my parking space at work. This is the only time I seem to get this noise. Not sure what it is. Basically, shift into reverse, apply the brake (lightly) and then POP! The steering wheel is not necessarily turned at the time. If you find out what it is, let me know.

Greg

Snap/Popping Type Noise Coming from Front of Vehicle (Remove Front Crossmember, Change Fastener Orientation) #03-08-61-002D - (Oct 8, 2004)

Snap/Popping Type Noise Coming from Front of Vehicle (Remove Front Crossmember, Change Fastener Orientation)

2003-2005 Cadillac Escalade

2003-2005 Chevrolet Avalanche, Suburban, Tahoe

2004-2005 Chevrolet Silverado with Recirculating Ball Type Steering

2003-2005 GMC Yukon, Yukon XL

2004-2005 GMC Sierra with Recirculating Ball Type Steering

All 1500 Series (½ Ton) with Two-Wheel Drive

This bulletin is being revised to update the correction information to reflect using the same procedure for all vehicles involved. Please discard Corporate Bulletin Number 03-08-61-002C (Section 08 -- Body and Accessories).

Condition

Some customers may comment on a snap or popping-type noise coming from the front of the vehicle. This condition is most apparent during hard left or right turns at low speeds. Going over bumps while turning may also aid in producing this noise.

Correction

Change the front crossmember fastener orientation using the procedure listed below.


All Model Years

Important: DO NOT slot the mounting holes on the crossmember as stated in previous bulletins. Slotting the holes has been found to be less effective and, in some cases, causes the noise condition to be more prevalent.


<LI type=1>Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in the General Information sub-section of the Service Manual. <LI type=1>Remove the mounting nuts, bolts and the front crossmember from the vehicle. <LI type=1>Clean all the undercoating off the crossmember in the area of the left side mounting holes. <LI type=1>Reinstall the crossmember with the bolts and nuts.
Tighten
Tighten the bolts to 120 N·m (89 lb ft).

Apply an even coat of Anti-Corrosion Coating, P/N 12346501, or equivalent, to the crossmember where removed. Overlap the original coating in order to provide an effective corrosion protection.
Warranty Information

For vehicles repaired under warranty, use:

<TABLE width="100%" border=1><TBODY><TR><TH vAlign=bottom align=middle>Labor Operation

</TH><TH vAlign=bottom align=middle>Description

</TH><TH vAlign=bottom align=middle>Labor Time

</TH></TR><TR><TD vAlign=center align=middle>A9976*

</TD><TD vAlign=center align=middle>Pop/Noise, Frame Rail - Repair

</TD><TD vAlign=center align=middle>0.5 hr

</TD></TR></TBODY></TABLE>

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

<TABLE width="100%"><TBODY><TR><TD align=left width=778>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.
</TD><TD align=middle width=42>http://service.gm.com/engif/000/999/999/999999994.gif </TD><TD align=middle width=167>WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION
</TD></TR></TBODY></TABLE>

Remove the mounting nuts, bolts and the front crossmember from the vehicle.
<TABLE width="100%"><TBODY><TR><TD align=left width=778>




</TD><TD align=middle width=42>




</TD><TD align=middle width=167>




</TD></TR></TBODY></TABLE>
Thanks GMCSID....Which one is the FRONT crossmember :confused:


Is it the one that hase the A-arms attached to?:help:



AND will this work for a 2001 2500hd

Yes, right under the engine. I borrowed this pic.

Well got er done!

It works...0.5hr for r&r the part, but NOT cleaning that black gunk off!

Also reversing the left hand fastener did the trick!

Well... I am sorry to say that the single pop noise is back.

I can better explain it as.."while turning at a slow speed the truck hits a small patch of ice and then when it hit the pavement I get that jolt sensation"

I noticed it is NOT noticable on gravel, only on pavement/blacktop surfaces.

would worn tie rod end/ ball joints/ torsion bar bushings do this?:help:

Intermediate shaft?

Intermediate shaft?

Maybe...But it only does it once (pop) while turning, and it is most noticable at SLOW parking lot manuvers (backing into a spot).

Have not herd it on bumpy curving roads, where I thought that was the situation for the intermediate shaft