ADDITIONAL INFORMATION ON NEW DESIGN CONTROL VALVE ASSEMBLY. GMC Truck S15 Pickup - 4WD 1984

For 1990-2009 cars

# ADDITIONAL INFORMATION ON NEW DESIGN CONTROL VALVE ASSEMBLY

1982-1985 LIGHT DUTY MODELS WITH 700-R4 AUTOMATIC TRANSMISSIONS

A new design Control Valve Body Assembly is referenced in Truck Service Bulletin 85-B-18.

1. The new design Control Valve Body Assembly was used in production starting on January 15, 1984, (Julian date 015) and is identified by one of two ways:

A. Casting number 2264 with a letter "X" (see Figure No. 1).

OR -

B. Casting number 4256 (see Figure No. 2).

2. The past design Control Valve Body Assembly (or build dates prior to Juhan date 015 of 1984) is identified by the casting number 2264 without an "X".

ALL CONTROL VALVE BODY ASSEMBLIES ORDERED FROM THE WAREHOUSING AND DISTRIBUTION DIVISION OF GENERAL MOTORS (WDDGM) ARE OF THE LATEST DESIGN AND WILL BE IDENTIFIED AS INDICATED IN ITEM 1, A. or B.

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.