For 1990-2009 cars

# SERVICE MANUAL UPDATE-SEC. 0B SCH. MAINT. OF SUPERCHARGERS

#### SUBJECT: SECTION OB - MAINTENANCE OF SUPERCHARGERS OIL AND NEW SERVICE PROCEDURE

#### VEHICLES AFFECTED: 1991-93 "C" MODEL AND 1992-93 "H" MODEL

#### APPLICATION:

----------- 1991-93 Buick "C" Models

1992-93 Pontiac "H" Models

1992-93 Oldsmobile "C" Models

This bulletin is an advisory concerning required maintenance of the supercharger oil level on the 3800 (L67) engine. The procedure for checking the oil level is also included.

#### INSPECT:

------- o Check oil level every 30,000 miles (50,000 km) or every 36 months.

#### CAUTION:

DO NOT REMOVE OIL PLUG WHEN THE ENGINE IS WARM. REMOVING THE OIL PLUG AT WARM ENGINE TEMPERATURES CAN CAUSE HOT OIL TO OVERFLOW. THIS COULD RESULT IN OIL LOSS AND POSSIBLE PERSONAL INJURY.

#### REMOVE:

------ 1. Wiring harness shield.

2. Oil plug.

#### NOTICE: The oil level should be maintained to the bottom of the plug threads. Do not use petroleum based oil. When adding oil use only synthetic oil (See Parts Information page 2). Failure to do so may cause supercharger failure.

#### INSTALL:

------- 1. Oil plug. Ensure 0-ring is in place on oil plug.

2. Torque plug to 10 N.m (88 lb.in.).

3. Wiring harness shield.

#### PARTS INFORMATION:

GMCL dealers use 5W30 synthetic oil (e.g. Mobile 1) NAES dealers use 12345982 (4oz /1 20ml container of synthetic oil)

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.