LEFT WINDOW EXPRESS DWN SWITCH (OPERATION INFORMATION)

Subject: LEFT HAND WINDOW EXPRESS DOWN SWITCH OPERATION (INFORMATION)

Models Affected: 1990-92 TRANS SPORT MODELS

This is an informational bulletin to familiarize technicians with the functional differences of left hand window switches used on the 1990-91 Trans Sport models as compared to those used on 1992 Trans Sport models.

It is important that technicians (and owners) understand how the different switches function, especially since 1990-91 switches are serviced with the 1992 switch. THE SWITCH FUNCTION SHOULD BE EXPLAINED TO ANY OWNER OF A 1990-1991 TRANS SPORT THAT HAS HAD A SWITCH REPLACED.

1990-91 Models: P/N 10149407 serviced by P/N 14098919: ------------------------------------------------------ When the rear of the rocker switch is depressed an audible click can be heard and the switch will remain depressed while the window expresses down. The switch will pop up when the express down cycle is complete. Express down may be cancelled while the window is in motion by depressing the front of the rocker switch.

1992 Models: P/N 14098919: --------------------------- When the rear of the rocker switch is partially depressed, an audible click can be heard and the window will start downward, but will stop if the switch is released -- the switch will not remain depressed. If the rear of the switch is fully depressed, a second less audible click can be heard and the window will express down -- again the switch will not remain depressed. Express down may be cancelled by depressing the front of the rocker switch any time the window is moving downward.

Switch Replacement:

Refer to section 10-6, Figure 3 of 1991 or 1992 Trans Sport Service Manual for Service Procedure. Removal of Door Panel is not necessary for switch replacement.

Parts are currently available through GMSPO.

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.