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Help! squeal noise on cold start last for 4 to 6min



squeal noise seems to come from front right side for the last week on cold start then goes away when warm. Today no problem on cold start in the morning but afternoon cold start squeal starts again until warm. :dunno:


Seasoned Member
Oct 17, 2008
My XLR/V(s)
'16 Z06, "06 XLR-V Infra Red-Sold, RII, RIII & RIV survivor, Mdwst Maurader
Could possibly be the serpentine belt. Cool damp days produce moisture which may be accumulating on the belt, then dries as it warms up. Just a thought.

squeal noise seems to come from front right side for the last week on cold start then goes away when warm. Today no problem on cold start in the morning but afternoon cold start squeal starts again until warm. :dunno:

Lola's Mom

Seasoned Member
Aug 6, 2008
Southern CA
My XLR/V(s)
2004 Black Raven
Ohhhhh yeah, that's that pulley alignment/issue / I'd bet money on it. Had that go on wayyyyyyyyy to long. Our Bruce, CadilladTech, actually diagnosed that when I first mentioned it to him. Our tech couldn't duplicate the noise. Finally it got to the point where if I would sit in the car and just tap the accelerate it would start to sing like bird. What a mess. I can't remember if they replaced the pulley assembly or what all, but I know that there was 2 new sets of belts involved.
Good Luck.


Seasoned Member
Oct 17, 2008
Lincoln, NE
My XLR/V(s)
2007 XLR-V RII'07 RIII'08 SA'09 CO'10 NCSC'11 PA'12 BG'13 MT'14 VBOBX'15
Might be a good ideal to have the belt tensioner check too! It might not be tightening the belts enough. they do wear out and go bad.

Cadillac Tech

Seasoned Member
Oct 16, 2008
squeal noise seems to come from front right side for the last week on cold start then goes away when warm. Today no problem on cold start in the morning but afternoon cold start squeal starts again until warm. :dunno:

Document ID: 1486339

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#04-06-01-007: Accessory Drive Belt Chirp or Squeal Noise (Align Pulleys, Install New Belt) - (Mar 30, 2004)

<TABLE border=0><TBODY><TR><TD vAlign=top width=100>Subject:</TD><TD vAlign=top>Accessory Drive Belt Chirp or Squeal Noise (Align Pulleys, Install New Belt)</TD></TR></TBODY></TABLE>​

<TABLE border=0><TBODY><TR><TD vAlign=top width=100>Models:</TD><TD vAlign=top>2004 Cadillac XLR</TD></TR></TBODY></TABLE>
<TABLE border=0><TBODY><TR><TD vAlign=top width=100></TD><TD vAlign=top>with 4.6L V8 Engine (VIN A -- RPO LH2)</TD></TR></TBODY></TABLE>​

<HR><A href="http://gsi.xw.gm.com/si/showDoc.do?docSyskey=1486339&from=sm#ss1-1486339">Condition

Some owners may comment on a belt chirp/squeal noise. The noise will be loudest on the right side (A/C Power Steering belt) of the engine. Upon investigation with chassis ears, the technician may locate the source of the noise to be the A/C Power Steering belt tensioner.
<A href="http://gsi.xw.gm.com/si/showDoc.do?docSyskey=1486339&from=sm#ss2-1486339">Cause

The A/C compressor and power steering pump may be slightly misaligned causing the belt to abnormally load the tensioner and create the noise. The tensioner is not the source of the concern and should not to be replaced. The noise may be eliminated when the tensioner is replaced, but it will return in a short amount of time.
<A href="http://gsi.xw.gm.com/si/showDoc.do?docSyskey=1486339&from=sm#ss3-1486339">Correction

The A/C compressor and Power Steering pump bracket should be aligned to relieve the loading of the belt tensioner and a new power steering belt should be installed. Use the following procedure to correct the misalignment condition.
  1. <LI type=1>Remove Engine Sight Shield. <LI type=1>Remove Primary Accessory drive belt from tensioner pulley. <LI type=1>Reclaim A/C system refrigerant. <LI type=1>Drain fluid from the Power Steering reservoir. <LI type=1>Disconnect hoses from reservoir. Plug hoses. <LI type=1>Do not pull on reservoir until hoses are removed. <LI type=1>Remove Power Steering reservoir from bracket. <LI type=1>Remove Power Steering reservoir bracket <LI type=1>Remove Power Steering/A/C compressor belt.
  2. Remove Power Steering pulley. Pulley removal tool - Kent Moore J-25034-C.

  1. <LI type=1>Remove Power Steering Pump bolts. <LI type=1>Lift vehicle and remove primary accessory drive belt. <LI type=1>Remove both front wheels. <LI type=1>Install support under engine cradle. <LI type=1>Compress transverse spring. Traverse Spring Compressor - Kent Moore J-33432.

    <LI type=1>Remove right side engine cradle nuts. <LI type=1>Loosen left side engine cradle nuts. <LI type=1>Lower front engine cradle. This is done for additional clearance.

    <LI type=1>Remove Power Steering -A/C belt tensioner bolts and tensioner. <LI type=1>Remove Power Steering-A/C belt . This belt will not be re-installed.

    <LI type=1>Disconnect Power Steering discharge line from pump. Tie wrap for appropriate clearance. <LI type=1>Disconnect A/C lines from compressor. Tie wrap for appropriate clearance. <LI type=1>Remove Power Steering pump. <LI type=1>Disconnect electrical connectors from A/C compressor. <LI type=1>Remove A/C compressor bolts and remove compressor. Pry cradle as needed to get compressor out of engine compartment.

    <LI type=1>Loosen 4 compressor/Power Steering bracket bolts, leaving them just snug enough to move the bracket within the bolt to hole clearances. <LI type=1>Rotate compressor/Power Steering bracket clockwise by pulling the top Power Steering attachment toward the front of the vehicle by hand. <LI type=1>While holding the bracket in the above position, tighten the bracket bolts. Tighten
    Tighten the bracket bolts to 50N·m(37 lb ft).​

    <LI type=1>Install A/C compressor and snug bolts so it can be rotated within the bolt to hole clearances. <LI type=1>Connect electrical connectors to the A/C compressor. <LI type=1>Rotate the compressor counterclockwise by prying upward on the compressor pulley. Excessive force is not necessary. Use a plastic or soft pry tool. A rag on a pry bar is acceptable.

    <LI type=1>While holding the compressor in the above position, tighten the compressor mounting bolts. Tighten
    Tighten the compressor mounting bolts to 50N·m(37 lb ft).​

    <LI type=1>Install Power Steering pump to proper location and hand tighten bolts. <LI type=1>Install Power Steering discharge line and tighten. Tighten
    Tighten the discharge line to 28N·m (21 lb ft).​

    <LI type=1>Install A/C compressor hose block fitting and tighten. Tighten
    Tighten the fitting to 20N·m(15 lb ft).​

    <LI type=1>Place new Power Steering-A/C belt. <LI type=1>Install Power Steering-A/C belt tensioner and bolts. Tighten
    Tighten the bolts to 25N·m(18 lb ft).​

    <LI type=1>Raise engine cradle. <LI type=1>Install right side engine cradle nuts and tighten. Tighten
    Tighten all engine cradle nuts to 110 N·m(81 lb ft).​

    <LI type=1>Decompress transverse spring and remove compression tool (Kent Moore J-33432). <LI type=1>Remove support from engine cradle. <LI type=1>Install front wheels. <LI type=1>Route primary accessory drive belt. <LI type=1>Lower vehicle. <LI type=1>Install primary accessory drive belt on tensioner. Tighten
    Tighten the Power Steering mounting bolts to 25N·m(18 lb ft).​

    <LI type=1>Install Power Steering pulley. Pulley should be installed within 0.25 mm of flush with end of Power Steering pump shaft (visual inspection is acceptable).
    Pulley installation tool - Kent Moore J-25033-C.​

    <LI type=1>Install new Power Steering-A/C belt on tensioner. <LI type=1>Install Power Steering reservoir bracket and tighten. Tighten
    Tighten the bracket to 10N·m(7 lb ft).
    Important: The reservoir hoses must be routed rear of the radiator hose routing.
    Important: The Power Steering hoses must not be twisted or kinked upon re-install.

    <LI type=1>Install Power Steering reservoir hoses to reservoir. <LI type=1>Install Power Steering reservoir to Power Steering Reservoir bracket. <LI type=1>Evacuate and recharge A/C system with 1.4 lb R-134a 55. Refill Power Steering system using Power Steering vacuum and fill procedures in SI. <LI type=1>Clean up lubricants from frame, engine and pulleys using an appropriate cleaner solvent.
  2. Start engine and check for proper belt operation.
<A href="http://gsi.xw.gm.com/si/showDoc.do?docSyskey=1486339&from=sm#ss4-1486339">Parts Information

<TABLE width="95%" border=1><TBODY><TR><TH vAlign=bottom align=middle>Part Number

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

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

</TH></TR><TR><TD vAlign=center align=middle>12578060

</TD><TD vAlign=center align=middle>Belt, Power Steering-A/C Accessory Drive

</TD><TD vAlign=center align=middle>1

</TD></TR></TBODY></TABLE>Parts are currently available from GMSPO.

For vehicles repaired under warranty, use:
<TABLE width="95%" 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>*E9005

</TD><TD vAlign=center align=middle>Bracket, Power Steering -- Replace

</TD><TD vAlign=center align=middle>2.6 hrs

</TD></TR></TBODY></TABLE>*This Labor Operation will not be published in the Labor Time Guide and is for bulletin use only.
<TABLE width="95%"><TBODY><TR><TD align=left width="80%"></TD><TD align=middle width=42> </TD><TD align=middle width=167>WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION


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