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1998 buick park avenue heater hose diagram

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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.

2004 Buick LeSabre Shake/Vibration in Steering Wheel, Floor, Seat at Highway Speeds on Smooth Roads (Diagnose/Balance Tires/Wheels) Service Manual

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Correction 1. Visually inspect the tires and the wheels. Inspect for evidence of the following conditions and correct as necessary: 2. Set the tire pressure to 30 psi (205 kPa) COLD. Subject: Shake/Vibration in Steering Wheel, Floor, Seat at Highway Speeds on Smooth Roads (Diagnose/Balance Tires/Wheels) Models: 1998-2005 Buick Park Avenue, Park Avenue Ultra 2000-2005 Buick LeSabre 1998-2004 Cadillac Seville (SLS, STS) 2000-2005 Cadillac DeVille (DTS only) 2001-2003 Oldsmobile Aurora 2000-2005 Pontiac Bonneville (17″ Tires only) • Missing balance weights • Bent rim flange • Irregular tire wear • Incomplete bead seating • Tire irregularities • Mud/ice build-up in wheel • Stones in the tire tread © 2009 General Motors Corporation. All rights reserved 3. Road test the vehicle with the Electronic Vibration Analyzer (EVA) essential tool for a sufficient distance on a known, smooth road surface to duplicate the condition. Record the Hertz (Hz) reading as displayed by the EVA onto the tire data worksheet found at the end of this bulletin. This should be done after a tire break-in period of at least 10 miles (16 km) at 45 mph (72 km/h) or greater, in order to eliminate any possible tire flat-spotting. 4. If the road test indicates a shake/vibration still exists, check the imbalance of each tire/wheel assembly on a known, calibrated, off-car dynamic balancer. If any assembly calls for more than ¼ ounce on either rim flange, remove all balance weights and rebalance to as close to zero as possible. Important: Some GM dealers may have a Hunter GSP9700 Road Force Balancer, or a Coats XR1850 Runout Balancer. Either will simplify Step 5 by not requiring dial indicators. If a Hunter GSP9700 machine is available, it may also be used to measure the radial force of the tire/wheel assembly. A guideline here is 18 lbs or less. 5. While on the balancer, measure wheel runout. If radial or lateral runout exceeds .020 in (0.50 mm) for aluminum wheels (.030 in (0.76 mm) for steel wheels), replace the wheel. 6. After confirming wheel balance and wheel runout, if any changes were made, road test the vehicle again. 7. If the smooth road shake/vibration still exists: Important: THE CONTROL ARMS SHOULD ONLY BE INSTALLED ON VEHICLES IF, AFTER THE TIRE AND WHEEL DIAGNOSIS AND REPAIRS HAVE BEEN PERFORMED, THE VIBRATION CONDITION STILL EXISTS. 8. Replace both lower control arms on vehicles built prior to the following VIN breakpoints. On Aurora, Bonneville, DeVille, Park Avenue, Park Avenue Ultra and Seville models, a newly developed hydro-bushing lower control arm with improved damping characteristics has been released. This control arm is not used on the LeSabre. The new lower control arms may provide an incremental improvement to the vehicle ride. Customers who have become “tuned in” to the shake condition may still feel some shake in the vehicle after the new lower control arms are installed. Refer to Lower Control Arm Replacement in SI (refer to the Parts Information table below for SI document ID numbers) . Important: The completed worksheet must be attached to the hard copy of the repair order. • If a Hunter GSP9700 Road Force/Balancing machine is used, record radial force variation (RFV) on the worksheet at the end of this bulletin. If one or more of the tire/wheel assemblies read more than 18 lbs, match mount the tire to the wheel to get below 18 lbs. Readings of 12 lbs or less are preferable for sensitive customers. • If a Coats XR1850 Runout/Balancing Machine is used, record radial runout of the tire/wheel assemblies on the worksheet at the end of this bulletin. If one or more of the tire/wheel assemblies are more than .040, match mount the tire to the wheel to get below .040. Readings of .030 inch or less are preferable for sensitive customers. • If the RFV or runout cannot be reduced to an acceptable level, replace the affected tire(s) under the guidelines of the GM Tire Warranty. • The screened tire program is only available for the General branded tires used on the Buick LeSabre. Complete the tire request form at the end of this bulletin and fax to Continental/General. • Road test the vehicle to ensure the shake/vibration has been eliminated

1984-1998 Jeep Wagoneer/ Commando/ Cherokee Emission Controls Crankcase Ventilation System (PCV/CCV)

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CCV Fitting See Figures 2 and 3 1. With the engine running, remove the CCV fitting. a. If the fitting is not plugged, a hissing noise will be heard as air passes through the valve. A strong vacuum should also be felt when a finger is placed over the fitting. b. Install the CCV fitting. c. Remove the fresh air hose from the air cleaner assembly and loosely hold a piece of paper over the open end of the hose. After allowing about one minute for the crankcase pressure to reduce, the paper should be sucked against the opening with a noticeable amount of force. 2. Turn the engine OFF . Remove the metered orifice fitting, and check for a plugged condition. A clicking noise should be heard to indicate that the valve mechanism is free. 3. If the crankcase ventilation system meets the tests in Steps 1 and 2 above, no further service is required. If not, the CCV fitting must be cleaned and the system checked again. 4. If Step 1c fails when the CCV fitting is cleaned, it will be necessary to replace the molded vacuum hose with a new one, and to clean the metered orifice port. 5. Clean or replace the engine air cleaner filter element with a new one-for more details, refer to the air cleaner procedure located in General Information & Maintenance. Fig. 2: CCV system diagram for 4.0L engine Fig. 3: CCV system diagram for the 2.5L engine Evaporative Emission Control System OPERATION The evaporative emission control system prevents the release of unburned hydrocarbons, from gasoline or gasoline vapor, into the atmosphere. When pressure in the fuel tank is below 3 psi (20 kPa), the pressure relief/rollover valves open allowing fuel vapors to flow to the evaporative canister where they are absorbed by a charcoal mixture. This prevents excessive pressure buildup in the fuel system. Most canisters are equipped with a calibrated orifice at the inlet to the canister.

1998 Chevy Truck S10/ T10 Blazer 2WD Evaporator Core Service and Repair Manual

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Manual A/C REMOVAL PROCEDURE CAUTION: Refer to Battery Disconnect Caution in Service Precautions. 1. Disconnect the negative battery cable. 2. Remove the right side instrument panel sound insulator. 3. Remove the instrument panel storage compartment. 4. Disconnect the passenger side SIR. 5. Remove the lower right instrument panel mounting bolt. 6. Remove the left and right front speaker grilles. 7. Remove the center instrument panel sound insulator. 8. Remove the left side instrument panel sound insulator. 9. Disconnect the park brake release cable. 10. Remove the knee bolster. 11. Remove the lower left instrument panel mounting bolt. 12. Remove the BCM. 13. Disconnect the driver side SIR. 14. Remove the instrument panel cluster. 15. Remove the radio. 16. Remove the HVAC control assembly. 17. Remove the steering column retaining retaining nuts. 18. Lower the steering column. 19. Remove the instrument panel carrier. 20. Remove the left and right cowl vent grille panels. 21. Disconnect the underhood lamp electrical connector, if equipped. 22. Remove the hood. 23. Remove the VCM. 24. Remove the coolant recovery tank. 25. Remove the heater hoses. 26. Disconnect the electrical connectors from the grille mounted lamps. 27. Remove the right front headlamp assembly. 28. Remove the front bumper. 29. Remove the right wheelhouse panel. 30. Disconnect the radio antenna cable. 31. Disconnect the electrical connector for the horn. 32. Remove the right fender. 33. Remove the evaporator case heat shield, if equipped. 34. Remove the blower motor resistor. 35. Remove the evaporator case bolts and screws. 36. Remove the accumulator. 37. Remove the condenser to the evaporator line fitting. 38. Remove the bolts which retain the evaporator case to the bulkhead. 39. Pull back lightly on the heater case to remove the evaporator case. 40. Remove the evaporator case retaining screws. 41. Disassemble the evaporator case sections, and remove the evaporator core. NOTE: If replacing the evaporator core, remove the expansion (orofice) tube and install it into the new core. INSTALLATION PROCEDURE 1. Install the evaporator core. 2. Assemble the evaporator case sections. 3. Install the evaporator case retaining screws. Tighten to 2.5 N.m (24 in lb) . 4. Install the evaporator core assembly to the vehicle. 5. Install the bolts which retain the evaporator case to the bulkhead. Tighten the bolts to 4.5 N.m (40 lb in) . 6. Install the condenser to the evaporator line fitting. 7. Install the accumulator. 1998 Chevy Truck S10/T10 Blazer 2WD 8. Install the evaporator case bolts and screws. Tighten to 2.5 N.m (24 In in) . 9. Install the blower motor resistor. 10. Install the evaporator case heat shield, if equipped. 11. Install the right fender. 12. Connect the electrical connector for the horn. 13. Install the radio antenna cable. 14. Install the right wheelhouse panel. 15. Install the front bumper. 16. Install the right front headlamp assembly. 17. Connect the electrical connectors to the grille mounted lamps. 18. Install the heater hoses. 19. Install the coolant recovery tank. 20. Install the VCM. 21. Install the hood. 22. Connect the underhood lamp electrical connector, if equipped. 23. Install the left and right cowl vent grille panels. 24. Install the instrument panel carrier. 25. Reposition the the steering column, and install the steering column retaining nuts. 26. Install the HVAC control assembly. 27. Install the radio. 28. Install the instrument panel cluster. 29. Connect the driver side SIR. 30. Install the BCM. 31. Install the lower left instrument panel mounting bolt. 32. Install the knee bolster. 33. Connect the park brake release cable. 34. Install the left side instrument panel sound insulator. 35. Install the center instrument panel sound insulator. 36. Install the left and right front speaker grilles. 37. Install the lower right instrument panel mounting bolt. 38. Connect the passenger side SIR. 39. Install the instrument panel storage compartment. 40. Install the right side instrument panel sound insulator. 41. Connect the negative battery cable. 42. Inspect the system for leaks.

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)