C/C WORKS INTERMITTENTLY (INSTALL NEW DESIGN LEVER)

SUBJECT: CRUISE CONTROL WORKS INTERMITTENTLY (INSTALL NEW DESIGN LEVER)

VEHICLES AFFECTED: 1985-92 M/L VANS AND 1986-92 S/T TRUCKS WITH OPTION RPO K34

Some owners of 1985-1992 M/L Vans or 1986-1992 S/T Trucks with cruise control (RPO K34) may comment that their cruise control operates intermittently. This condition may be caused by the wires becoming pinched as they exit the multi-functional lever. These wires may ground out on the lever rod and short the cruise function. To correct this condition in production, the wiring harness that exits the lever has been rerouted and the opening in the multi-functional lever has been redesigned to allow the wires more clearance. The diagnostic procedures in the applicable Service Manual should be followed before replacing the multi-functional lever. If the multi-functional lever requires replacement, the following procedure should be performed:

SERVICE PROCEDURE:

1. Disconnect the wire harness connector.

2. Remove the harness protector cover.

3. Attach a long piece of mechanic's wire to the end of the harness connector.

4. Remove the multi-functional lever from the turn signal switch.

5. Gently pull the harness up and out so the mechanic's wire can be used to install the new unit.

6. Attach the upper end of the mechanic's wire to the harness connector. Gently pull the mechanic's wire at the lower end of the column, feeding the harness into the proper location in the column.

7. Install a redesigned multi-functional lever (P/N 25111290) into the turn signal switch.

8. Disconnect the mechanic's wire from the harness connector.

9. Install the harness protector cover.

10. Reconnect the wire harness connector.

SERVICE PARTS INFORMATION:

Part Number Description ----------- ----------- 25111290 Multi-functional Lever

Important: The new Part Number (P/N 25111290) should be used when correcting this condition in the above listed vehicles.

Note the difference between the wire exit openings of the new multi-functional lever and the old lever (Figure 1).

WARRANTY INFORMATION:

For vehicles repaired under warranty use:

Labour Operation: E-7060 (Multi-functional lever, replace) Labour Time: 0.4 Hours.

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.