SERVICE MANUAL UPDATE

SUBJECT: SERVICE MANUAL UPDATE - SECTION OB-99 MAINTENANCE AND LUB. AND SECTION 3-28 STEERING, SUSPENSION, TIRES AND WHEELS DIAGNOSIS

MODELS AFFECTED: 1993 ROADMASTER

Section OB-9 and Section 3-28

Application: 1993 Roadmaster

Spark Plug and Suspension Specification changes for the above model. the above model.

The Service Manual for Section OB-9 and Section 3-28 has been revised. These pages should be replaced in the current Service Manual.

MAINTENANCE ITEMS

Air Cleaner Filter..................................AC Type A1135C

Engine Oil Filter...................................AC Type PF25

Fuel Filter.........................................AC Type GF580

PCV Valve...........................................AC Type CV914C

Spark Plug Assemblies and Gap.......................AC.CR43TS 0.89 mm (0.035")

APPROXIMATE FLUID CAPACITIES

Air Conditioning

R-12................................................1.4 kg (3.1 lb.)

Engine Crankcase

Without Filter Change...............................3.8 liters (4.0 qt.)

With Filter Change..................................4.3 liters (4.5 qt.)

FuelTank

Sedan...............................................87.4 liters (23 gal.)

Wagon...............................................83.3 liters (22 gal.)

Transmission

Automatic (HYDRA-MATIC 4L60)

Drain & Refill......................................4.7 liters (10.0 pt.)

Overhaul............................................10.6 liters (22.4 pt.)

Cooling System

Without Heavy-Duty Radiator.........................13.7 liters (14.5 qt.)

With Heavy-Duty Radiator............................13.8 liters (14.6 qt.)

The capacities shown here are approximate. Add fluid as necessary to bring to appropriate level.

WHEEL NUT TORQUE

Wheel Nuts..........................................140 N.m (100 lb. ft.)

REAR AXLE FILLER PLUG TORQUE

Filler Plug.........................................35 N-m (26 lb. ft.)

BELT TENSION SPECIFICATIONS

Engines equipped with serpentine belts have an automatic tensioner. No adjustment of this belt is necessary.

TIRE PRESSURE SPECIFICATIONS

Sedan

Front...............................................205 kPa (30 psi)

Rear................................................205 kPa (30 psi)

Compact Spare.......................................415 kPa (60 psi)

Full-Size Spare.....................................240 kPa (35 psi)

Wagon

Front...............................................205 kPa (30 psi)

Rear................................................240 kPa (35 psi)

Compact Spare.......................................415 kPa (60 psi)

Full-Size Spare.....................................240 kPa (35 psi)

Object Number: 78849 Size: FS

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.