Power Steering - System Noise
88cad03Bulletin No.: T-88-111
File in Group: 3B
Number: 25
Corp. Ref. No.: 803201R
Date: April '88
SUBJECT: POWER STEERING SYSTEM NOISE
MODELS AFFECTED: 1987-1988 DE VILLES AND FLEETWOODS WITH BASE SUSPENSION
Some 1987-1988 De Villes and Fleetwoods with base suspension may exhibit a condition of power steering system noise. This condition may be caused by the power steering pump. To repair this condition a new power steering pump, P/N 26012285, is available for service from GMSPO. The new pump has a reduced flow rate which reduces noise caused by the pump.
1987 and 1988 De Villes and Fleetwoods with Touring Ride & Handling Suspension (RPO FE2) must still be serviced with power steering pump P/N 26006703. These vehicles have a close ratio, higher effort steering gear that, when used with the new pump, could result in high steering efforts during certain maneuvers.
Refer to Serviceman Bulletin T-87-48, Group 3B, and Section 3 of the appropriate Service Information Manual for power steering noise diagnosis. Refer to Section 3B3 of the appropriate Service Information Manual for power steering pump service procedures. Refer to Serviceman Bulletin T-87-55, Group 3B, for revised power steering system bleed procedure.
For warranty purposes use Labor Operation E9050 at .5 hour.