SERVICE MANUAL UPDATE SEC. 6E IDLE SPEED ADJUSTMENT. Geo Tracker - 4WD 1993

For 1990-2009 cars

# SERVICE MANUAL UPDATE SEC. 6E IDLE SPEED ADJUSTMENT

#### Subject: IDLE SPEED ADJUSTMENT

#### Model and Year: 1993 GEO TRACKER

The information contained in this bulletin amends steps 5 and 6 on page 6E2-C2-9 under "Idle Speed Adjustment" found in Driveability and Emissions 1.6L engine RPO LS5 (VIN U) (Section 6E2-C2) of the 199 Geo Tracker Service Manual (ST377-93).

5. Adjust idle speed and/or IAC duty (ISC duty) as necessary. Correct idle speed by turning the idle speed adjusting screw "IN" to decrease or "OUT" to increase idle speed. Correct IAC duty (ISC duty) by turning the idle speed adjusting screw "IN" to increase or "OUT" to decrease IAC duty (ISC duty).

6. Turn A/C switch and blower speed selector switch ON. Check that the specified idle speed is obtained. If not, check A/C ON signal circuit and idle air control valve.

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.