UPDATE-POWER STEERING SYSTEM TEST PROCEDURES

Models Affected: 1989 6000

In the 1989 Service Manual page 3-12 steps 7, 7b and 7c have been updated to reflect a revised pressure reading specification.

(Step 7)

The second to last sentence should read: Each reading should show at least 8,619 9kPa (1,250 psi) and not the printed specification 6,895 kPa (1,000 psi).

(Step 7b)

If the pressure readings are high enough, but are not within 345 kPa (50 psi) of each other, the flow control valve in the pump is sticking; clean it and remove any burrs using crocus cloth or fine hone. DO NOT DISASSEMBLE THE FLOW CONTROL VALVE. Flush the system if required.

(Step 7c)

If the pressure readings are less than 8,619 kPa (1,250 psi) replace the flow control valve and recheck. If the pressures are still low, replace the rotor and vanes.

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.