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gm corporate bulletin number 02 06 05 003g section 06 enginepropulsion system

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Exhaust Moan/Vibration Noise (Install Exhaust System Flex Pipe Kit)

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1999-2007 Chevrolet Silverado 1500 Series Extended Cab or Regular Cab/Long or Short Box Pickups (Classic) 2007-2010 Chevrolet Silverado 1500 Series Extended Cab or Regular Cab/Long or Short/Standard Box Pickups (New Body Style) 1999-2007 GMC Sierra 1500 Series Extended Cab or Regular Cab/Long or Short Box Pickups (Classic) 2007-2010 GMC Sierra 1500 Series Extended Cab or Regular Cab/Long or Short/Standard Box Pickups (New Body Style) with 4.3L Engine (VINs W, X — RPOs L35, LU3) and Automatic Transmission (RPO M30) * This bulletin is being revised to add the 2009 and 2010 model years and remove exhaust dampener installation procedures. Please discard Corporate Bulletin Number 02-06-05-003G (Section 06 — Engine/Propulsion System). Condition Some*customers*may*comment*on*a*moan*or*vibration*n oise*at*low*vehicle*speeds*40*64*km* (25*40*mph)*or*b etween*900*1700*RPM*under*load. Cause Exhaust*system*resonance*may*be*transmitted*through *the*powertrain*mounts*into*the*body* causing*this*condition. Correction

GM Accessories Headrest DVD System Display Monitor Inoperative (Install Cable Connector Clamps)

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GM Accessories Headrest DVD System Display Monitor Inoperative (Install Cable Connector Clamps) Models: 2004-2007 Buick Rainier 2008 Buick Enclave 2003-2008 Cadillac Escalade Models 2005-2008 Cadillac CTS, SRX, STS 2006-2008 Cadillac DTS 2003-2008 Chevrolet Avalanche, Silverado, Suburban, Tahoe, TrailBlazer Models 2006-2008 Chevrolet Colorado 2007-2008 Chevrolet Equinox, HHR 2003-2008 GMC Envoy Models, Sierra, Yukon Models 2006-2008 GMC Canyon 2007-2008 GMC Acadia 2007-2008 Pontiac Torrent 2005-2008 HUMMER H2 2006-2008 HUMMER H3 2007-2008 Saturn OUTLOOK 2005-2008 Saab 9-7X This bulletin is being revised to update the models affected list. Please discard Corporate Bulletin Number 07-08-44-016 (Section 08 — Body & Accessories). Condition Some customers may comment on an inoperative display monitor or monitors in the GM Accessories Headrest DVD System. Cause This condition may be caused by a loose connection at the display monitor cable connectors. These connectors are located at the lower rear part of both front seats. Two cables are routed to the display monitor in each seat. Correction Do This Don’t Do This Install display monitor cable connector clamps. Do Not replace the DVD system display monitor. Important: A number of headrest monitors have been replaced under warranty and in many cases, no trouble was found by the supplier when these units were analyzed. Therefore, technicians should be checking for loose connections and installing cable connector clamps to ensure a positive and robust connection. Technicians are to install a video cable connector clamp on each cable connector located under each front seat. A total of four cable connector clamps, P/N 19159659, are required for each vehicle. The illustration above shows a pair of display monitor cable connectors without the cable clamps installed.

Vehicles Equipped with a Webasto Sunroof System

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Models: 1997-2000 Buick Century 1988-1991 Buick Reatta 1988-1999 Buick Riviera 1989-2000 Buick Park Avenue 1998-2000 Buick Regal 1988-1997 Cadillac Seville 1988-1996 Cadillac Fleetwood 1988-2000 Cadillac Eldorado 1989-2000 Cadillac DeVille 1995-2000 Chevrolet Cavalier 1998-2000 Chevrolet Malibu 2000 Chevrolet Impala, Monte Carlo 1988-1995 Oldsmobile Ciera 1989-1996 Oldsmobile Ninety Eight 1994-1998 Oldsmobile Achieva 1995-1999 Oldsmobile Aurora 1997 Oldsmobile Silhouette 1998-1999 Oldsmobile Cutlass 1998-2000 Oldsmobile Intrigue 1999-2000 Oldsmobile Alero 1987 Pontiac 6000 1989-1998 Pontiac Bonneville 1994-2000 Pontiac Grand Am 1995-2000 Pontiac Sunfire 1997-1998 Pontiac Trans Sport 1997-2000 Pontiac Grand Prix 1997-2000 Chevrolet & GMC S/T Models (Blazer, Jimmy) 1997-2000 Oldsmobile Bravada #99-08-67-003: Info – Vehicles Equipped with a Webasto Sunroof System – (Jul 23, 1999) This bulletin is being revised to update the model information. Please discard Corporate Bulletin Number 43-10-18A (Body Section)

1995-1999 Buick Riviera Steering Vibration/Shudder/Moan During Parking Maneuvers on Dry Pavement (Install Power Steering Pressure (Inlet) and/or Return (Outlet) Hose Assembly)

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1. Verify that the power steering pump reservoir is full. 2. Verify that the accessory drive belt is in good condition and that the pulleys are not bent or damaged. 3. Verify proper belt tension and operation of the belt tensioner. 4. Check for power steering hose ground out conditions. 5. Check for good engine idle and correct engine RPM. 6. Check to see that the rear transaxle mount does not have a plastic assembly aid installed which is used Subject: Steering Vibration/Shudder/Moan During Parking Maneuvers on Dry Pavement (Install Power Steering Pressure (Inlet) and/or Return (Outlet) Hose Assembly) Models: 1995-99 Buick Riviera 1997-2001 Buick Park Avenue, Ultra 2000-2001 Buick LeSabre 2000-2001 Pontiac Bonneville • 1995-98 Buick Riviera • 1997-98 Buick Park Avenue and Ultra • 1999 Buick Riviera • 1999-2001 Buick Park Avenue and Ultra • 2000-2001 Buick LeSabre • 2000-2001 Pontiac Bonneville • If fluid level is low, fill and check for leaks. • If power steering system has air in the system, perform the “Bleeding Air from Power Steering System” procedure as described in the Power Steering System sub-section of the Service Manual. Important: When performing the “Bleeding Air from Power Steering System” procedure, it is important that the front of the vehicle is supported by the lower control arms. If the vehicle is not supported by the lower control arms, the procedure may cause the strut bushing to dislocate and cause new concern. for assembly purposes. If the assembly aid is installed, remove the assembly aid and install the rear transaxle mount. 7. With the vehicle on dry pavement, maneuver the vehicle in parking positions. If the steering vibrates/shudders or moans in this test, replace the power steering pressure hose and/or the harmonic balancer. Important: A defective harmonic balancer on the 1995 Buick Riviera can influence steering vibrations after power steering hose installation. Important: When installing the pressure hose on the 1995 Buick Riviera, pull down on the pressure hose at the rear of the engine or bend the hose to allow clearance between the hose and the front of the dash. Power Steering Pressure (Inlet) Hose Replacement Procedure For 1995-1998 Vehicles: 1. Raise and suitably support the vehicle. Refer to Vehicle Lifting and Jacking in the General Information section of the Service Manual. 2. Drain the power steering fluid. Refer to Draining the Power Steering System in the Power Steering section of the Service Manual. 3. Remove the power steering gear assembly heat shield (1). 4. Disconnect the power steering pressure hose from the power steering pump assembly (4). 5. Remove the bolt/screws from the retaining clips (3). 6. Disconnect the power steering pressure hose from the power steering gear assembly (2). 7. Remove the power steering pressure hose assembly from the vehicle. 8. Install the power steering pressure hose assembly to the vehicle. 9. Connect the power steering pressure hose to the power steering pump assembly (4). 10. Connect the power steering pressure hose to the power steering gear assembly (2). Tighten Tighten the power steering pressure hose to the steering gear to 27 N·m (20 lb ft). 11. Install the bolt/screws to the retaining clips (3). Tighten Tighten the retaining clip bolt/screws to 6 N·m (53 lb in). 12. Install the power steering gear assembly heat shield (1). 13. Lower the vehicle. 14. Fill and bleed the power steering system using, J 43485. Refer to Corporate Bulletin Number 83-32-09, dated November, 1998. Power Steering Pressure (Inlet) and Return (Outlet) Hose Replacement Procedure For 1999-2001 Vehicles: 1. Raise and suitably support the vehicle. Refer to Vehicle Lifting and Jacking in the General Information section of the Service Manual. 2. Drain the power steering fluid. Refer to Draining the Power Steering System in the Power Steering section of the Service Manual. 3. Remove the LH front wheel/tire assembly. 4. Remove the LH lower splash shield. 5. Remove the lower radiator air deflector (engine splash shield, if installed.

L36, L67, L26, L32, LA1, LX9, MN7, M15 Ticking or Knocking Type Noise Coming From Engine or Transmission Area (Replace Flexplate and Torque Converter)

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with 3800 3.8L Series III V6 Engine (VINs K, 1, 2, 4, – RPOs L36, L67, L26, L32) or 3500 3.5L V6 Engine (VINs L, 8 RPO LX9) or 3400 3.4L V6 Engine (VIN E – RPO LA1) and Hydra- Matic(R) 4T65-E Transmission (RPOs MN7, M15) Supercede: This bulletin is being revised to update the pictures for better clarification. Please discard Corporate Bulletin Number 06-06-01-014B (Section 06 – Engine/Propulsion System). Condition Some customers may comment on a ticking or knocking type noise coming from the engine or transmission area. Cause Typically the noise is caused by either the transmission rear dust cover contacting the flexplate (refer to Corporate Bulletin Number 05-06-01-028) or a cracked flexplate (sometimes also referred to as a flywheel). Correction With the vehicle raised and supported on a suitable hoist, verify that the noise is coming from the flexplate area. If the noise is present, follow the procedure below. If the noise is not coming from the flexplate area, refer to Lower Engine Noise, Regardless of Engine Speed in SI. Important: The following information only applies to vehicles with the noise coming from the flexplate area.