SQUEAKS, RATTLES AND NOISES DIAGNOSTIC GUIDE

Model and Year: 1984 CORVETTE

SQUEAKS AND RATTLES INSTRUMENT PANEL DRIVER'S SIDE

CONDITION CORRECTION

Creak - Windshield Garnish Molding Reinstall molding to obtain slight Rubs Against Wind- clearance or insulate with foam shield tape.

Squeak & Creak Instrument Panel Pad Rubbing Against Reinstall molding or I.P. pad to A-Pillar Garnish obtain slight clearance or insu- Molding late with foam tape.

Squeak - Noisy Windshield Wiper Blades Replace wiper blades.

Mousey Squeak While Turning Steering Wheel S/C Seal Not Lubed. Hood to Cowl Bumper - Rubbing Against Hood Assembly Lightly lub each item

Rattle - Loose In- strument Panel Braces to Carrier Tighten brace attachment.

Metallic Rattle Extra Bolt Rolling About in Cross Body Beam Remove bolt.

Rattle/Thump - At Adjust hood latch. Fit of hood Base of A-Pillar - should be set with hood bumper Hood not Latched low. Then hood bumper should or Tension Adjust- be adjusted upward to add ment Incorrect slight pressure to hood. Hood bumper should be lubricated.

Thump - Windshield Adjust wiper travel as required Wiper Blade Hits at the wiper motor. Access is A-Pillar through left cowl screen.

Tinny Jingle - Loose Back Plate on I/P Cluster Assembly Tighten cover plate.

Buzz - LH A/C Outlet Replace outlet assembly, P/N Vanes Loose 14046017.

Loose Courtesy Lamp Use double layer of black elect- LH Hush Panel rical tape on edge of hush panel opening to tighten lamp fit.

Make sure that the four Velco Trim Panel Vibrates fasteners are located such that fore and aft beat- the bezel will be secured to the ing against I/P I/P carrier. Some early vehicles cluster assembly will need the Velco fasteners (see Figure #1) added. The Velcro should not overlap the lens covers. Also some vehicles will need the wax- paper removed from the adhesive on the fasteners. Fasteners P/N is 14065045.

Plastic Buzz - Loose Velco fastener is overlapping Directional Signal lens. Reposition or replace Lens I/P Cluster Velcro fastener so that it is Assembly clear of the lens.

Itch & Creaks Loose I/P Pad At- tachment Screws Tighten I/P screws.

Ticking Engine Noise - Sounds Stickey Valve Lifter or Fuel Replace lifters per shop manual Injectors procedure.

SQUEAKS AND RATTLES CENTER OF INSTRUMENT PANEL

CONDITION CORRECTION

Squeak - Engine Wire Harness and/or Posi- tive Battery Cable Rubs Against Front Bend cable retainer forward to Floor Panel obtain clearance.

Creak - Windshield Wiper Stops; Rubs Against Glass Bend to obtain slight clearance.

Windshield Wiper Ramps (Bottom Side) Contact Windshield Reposition ramp slightly lower.

Buzz - Loose Infor- Secure lens to information cen- mation center lens. ter by using clear two-sided trim tape.

Loose Center Trim Bezel Screws Tighten screws.

Clunking - Wind- Problem is because expandable shield Wiper Trans- sealer from P/N 14051109 sealer mission Link Con- plate has run. Sealer can be tacts Expandable trimmed for clearance. On some Sealer cases, the plate may be loose. In such cases the plate should be repositioned and secured (see Figure #2) with air-dry adhesive.

Rattle - Loose Attaching Screws Defroster Assembly Tighten Screws

Tinny Rattle Loose I/P Attaching Brace(s). Loose Top Plate in Radio As- sembly Tighten attachment.

Squeak & Creak - Top Install two (2) strips of P/N Edge of Center I/P 359270 foam strips on top of Trim Panel Rubs the trim panel assembly to Against Bottom of isolate panel from the I/P I/P Pad (see Figure #3).

SQUEAKS AND RATTLES INSTRUMENT PANEL - PASSENGER'S SIDE

Rattle & Buzz Loose Vanity mirror Wire Con- nector Raps Against Plastic Reroute wire to obtain clear- A/C I/P Outlet ance or tape connector a Tube wire to stop movement.

Rattle/Thump - At Base of A-Pillar; Hood not Latched Adjust hood latch for proper or Tension Adjust- function. Adjust hood bumpers ment Incorrect to slightly load hood.

Buzz - Loose Vanity Tighten lens by using drop of Mirror Lens. glue.

RH A/C Outlet Vanes Replace outlet with P/N Loose 14046018 deflector assembly.

Mousey Squeak - Hood to Cowl Bumper Rub- bing Against Hood Assembly Lube hood bumper.

Squeak & Creak - I/P Pad Rubbing Against A-Pillar Garnish Adjust either molding or pad to Molding obtain clearance.

Creak-Windshield Garnish Molding Rubbing Against Adjust for slight clearance or W/S insulate with foam.

SQUEAKS AND RATTLES FORWARD OF INSTRUMENT PANEL

Clunk - Over Heavy Isolate wheelhouse by adding Impacts - Wheelhouse foam between rear outboard suf- Upper Panel Hits face of wheelhouse and hood Hood Assembly inner (see Figure #4).

Buzz - 900 RPM Air Cleaner Assembly Tighten air cleaner nuts.

Thump - Headlight Assembly Hits Cruise Control Vacuum Line and Move vacuum line and tie down Against Wheel- to fuel canister lines. Adjust house Support wheelhouse support to obtain During Operation. clearance.

SQUEAKS AND RATTLES DOORS

Buzz - Door Lock Fully install slider. If flock- Slides Loose; ing is missing then replace Flocking Missing? slider with new, P/N 20380981, slider.

Tinny Rattle - Loose Rivets - Door Remote Handle to Inner Panel. Lock Rods Hit Plate Assembly Use foam tape to restrict and Inner Plate Raps dampen rods. one position is Against Door Panel on raised channel in hardware Forward Lower Corner. plate.

Tappinq Noise - Loose Wires and/or Tape and/or rosebud wires to Connectors door or to door hardware plate.

Snap - When Opening Door - Shifting of Spring in Hinge Assembly Lube Spring

Interior Door Remote Reposition door trim bezel to Handle Snaps on Trim provide clearance. In some Bezel cases, it will be necessary to reposition door interior trim panel rearward before the trim bezel can be moved.

Squeak - Glass Fric- tion Against Inner Draft Strip Wet glass condition - no action.

Minimum or No Lube on Door Handles Lube door handles.

Door Hinge Roller Lubricate roller with penetra- Doesn't Rotate ing lube.

Worn Door Hinge Replace hinge assembly - upper Bushings P/N 14043176, lower, P/N 14043177.

Clank With Door Glass Down - Door Add double layer of P/N 3999572 Glass Hits Side foam (see Figure #5) insulator Impact Beam to two spots on side impact bea

SQUEAKS AND RATTLES CONSOLE AREA

Jingle - Transmis- sion Filler Tube Rattles Against Adjust filler if possible; if Underbody - Right not isolate with foam tape Side of Tunnel around tube.

Jingles - Converter Pipe Loose in For- ward Clamp Tighten clamps.

Clicking - Loose Route antenna cable between Power Antenna Cable carpet and floor insulator.

Tinny Buzz - Heat Shield Buzzes Against Exhaust Bend shields as required to Pipe (2700 RPM). clear converter flange or ex- Heat Shield Con- haust pipe tie strap (just be- tacts Transmission fore split above axle). Remem- and/or Exhaust Pipe ber dynamic clearance (see Heat Shield Figure #7) is required.

Squeak - Shift Sand pointer rubbing surface Pointer Rubs Against smooth. Sand off stabilizer Plastic Lens (see Figure #8) point of bottom of pointer point.

SQUEAKS AND RATTLES REAR COMPARTMENT - LEFT SIDE

Tinny Jingle - Power Install foam tape to the flanges Antenna Shield Con- of the anteanna shield. Tape tacts Body Upper RR thickness should be sufficient Panel Assembly to prevent contact of shield to body (see Figure #9).

Mousey Squeak - Seat Back Rubs Against Remove vinyl binding and trim Vinyl Binding of RR carpet if appearance is poor. Side Carpet Assembly This is production fix.

Clicking or Metallic Rattle - Loose Rear Tail Lamp Support Bracket to Rear Bumper Retainer, and/or Lamp Mtg. Plate. Loose Rear Tail Lamp Support Install P/N 14078683 L/H or P/N Bracket to Rear Bumper 14078684 R/H with pop rivets. Support, and/or Lamp Mtg. Plate

Clunk - Power Antenna Cable and Relay Slaps Isolate with foam especially Against Rear Floor above rear speaker enclosure. Panel

Muffler Hitting Under- Adjust muffler and exhaust for Body clearance.

Buzz - Loose Side Carnish Moldings Loose Screws Tighten screws.

Loose Wires Against Isolate wires with foam. Slip Trim Panel wires under carpet retainer.

Loose Trim Bezel Roof Stowage Bracket - Loose Screws Tighten screws.

Bang-Bang - Make sure that antenna fasteners Antenna Assembly are tight. On some early vehi- Hits Body cles antenna bracket was held on with only 1 stud. on these vehi- cles the antenna motor should be wrapped with foam. Secure foam with plastic tie strap.

SQUEAKS AND RATTLES ROOF

Creak - Unibody Con- tacts Upper Roof Bend or grind uniframe flanges Assembly to obtain clearance.

Gross Banging Tighten customer bolts. Instruct Loose Removable owner that long end of wrench Roof Assembly must be used to obtain proper torque. If rattle persists, then tighten roof bracket attachments also.

Metallic Rattle Loose Cage Nuts. Loose Brackets in Frame of Acrylic Roof Assembly Tighten attachments.

Chucking - Hatch Remove halo garnish trim and Glass Moves Lat- shift hinge attachments inboard erally on Hinge or outboard to eliminate side Pins play in hinges. (Both hinges inboard or outboard). (See Fi- gure #10).

SQUEAKS AND RATTLES CENTER OF REAR COMPARTMENT

Rattles - Security Screen - Beaming Put 12.7mm (1/2") thick foam under Shake Beats Against carpet in front of hatch latch Rear Trim Panel support bracket (see Figure #11)

Parking Brake Equalizer Bangs Against Underbody Wrap in foam.

Rear Trim Panel Loose Screws Tighten screws.

Gross - Gas Struts Hits Roof Shingle When Roof in Stowed Rotate strut attachment slightly Position outboard to gain clearance.

Metallic Rattle Stowed Roof Assem- Replace nuts with P/N 11508382 bly - Loose Screws torque prevailing nuts and add Rear Roof Stowage two washers, P/N 11500322 to the Bracket latch assembly (see Figure #13).

Plastic Rattle - Install two rubber bumpers, P/N Stowed Roof Assembly 14083567 on rear garnish molding Hitting the Rear Gar- (see Figure #13). nish Molding

Fuel Filler Door Out- Bend hinges to center door in board Edges Hits Roof opening or shim entire filler Upper Panel and/or door assembly up 2mm (.040) us- Lower Panel of Door ing washers. This will affect Assembly door flushness.

Buzz - Loose Handle - Roof Stowage Bracket to Retainer Tighten handle.

Thumper - Fuel Over- flow Hose Hitting Fuel Strap fuel filler hose to tether Tank assembly (see figure 12).

Clicky-Clicky - Loose Wire Harness Sags Above Wire License Plate Opening. Loose Hatch Ajar Wire Con- nector Raps Against Tape wires and connectors to Antenna Relay stop rattles.

Heavy Metallic Clicking - Hatch Replace non-coated striker with Striker P/N 14049028 hytel coated striker (see Figure #10).

Bang - Loose Stabi- lizer Bar Tighten fasteners.

Squeak - High Pitch Brake Rotor/Dust Shield Rubs Bend dust shield to clear rotor.

Buzz - Loose Side Garnish molding - Loose Screws. Loose Trim Roof Stowage Bracket - Loose Screws Tighten screws.

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those 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 a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.