For 1990-2009 cars

# FLOOR PAN VIBRATION/MOAN NOSIE MODIFY AIR LINE TO CAT. CONV

CONDITION

Some 1983 Cutlass Cieras, equipped with a 3.0L V-6 engine, may experience a vibration and moan in the floor pan. This condition which occurs at approximately 1900 RPM, may be caused by the air injection line to the catalytic converter contacting the underbody.

CORRECTION

1. Hoist the car and remove screw attaching the catalytic converter air injection line to the floor pan and heat shield. Cut off mounting tab from the air injection line. (See fig. 1.)

2. Loosen the hose clamp and separate the air injection line from the air hose. Cut 1/2 in. off the hose and reinstall over the air line. Tighten the hose clamp.

3. Modify the new clip, part no. 25515259, as shown in fig. 1, view B. Install one (1) grommet, part no. 10016079, and the new clip over the air iine (refer to fig, 1, view A) and position as close to the air hose as possible. Reinstall screw, securing the clip to the floor pan and heat shield. (It may be necessary to bend the tab on the floor pan and heat shield to gain sufficient clearance.)

After installation, check for clearance between the air line and underbody, and the air hose and exhaust pipe.

4. Using two (2) straps, part no. 3816659, secure two (2) gromments, part no. 10016079, to the air pipe at the location shown in Fig 2.

#### PARTS INFORMATION

3 Grommets Part no. 10016079 1 Clip Part no. 25515259 2 Straps Part no. 3816659

#### WARRANTY INFORMATION

Trouble Operation Labor Failed P/N Code Number Hours ----------- ---- ------ ----- 25515259 92 T4068 0.5

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.