GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1998 🢒 GMC Suburban - 2WD 🢒 Body and Accessories 🢒 Cruise Control 🢒 Cruise Control System Check

Step

Action

Normal Result(s)

Abnormal Result(s)*

1
  1. Drive the vehicle at a speed greater than 25 MPH.
  2. Move the cruise control switch to the ON position.
  3. Press and hold the SET/COAST switch for 2 seconds.

The cruise control engages and maintains the desired speed.

2

Press and hold the RESUME/ACCEL switch.
    • The vehicle accelerates when the switch is pressed.
    • When the switch is released, the vehicle maintains the speed at which the switch was released.

3

Press and hold the SET/COAST switch.
    • The vehicle decelerates when the switch is pressed.
    • When the switch is released, the vehicle maintains the speed at which the switch was released.

4
  1. Depress the brake pedal.
  2. Press and release the RESUME switch.
    • The cruise control disengages. The vehicle decelerates.
    • The cruise control re-engages. The vehicle returns to the previously set speed.

5
  1. Depress the clutch pedal.
  2. Press and release the RESUME switch.
    • The cruise control disengages. The vehicle decelerates.
    • The cruise control re-engages. The vehicle returns to the previously set speed.

6

TAP-UP

Press the RESUME/ACCEL switch for 1 second and release.

The vehicle accelerates in 1 MPH increments for each tap of the switch.

7

TAP-DOWN

Press the SET/COAST switch for 1 second and release.

The vehicle decelerates in 1 MPH increments for each tap of the switch.

* Refer to the appropriate symptom diagnostic table for the applicable abnormal result.