Test description

WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

The numbers below refer to the step numbers on the diagnostic table.

8. This step tests the cruise control set/coast switch signal circuit for an open or for a high resistance.

9. This step tests the cruise control resume/accel switch signal circuit for an open or for a high resistance.

10. This step tests the ignition 3 voltage circuit for an open, for short to ground, or for a high resistance.

DTCs will set in the PCM when you perform this table.

Fig 1: Cruise Control Inoperative/Malfunctioning (4.8L, 5.3L, 6.0L, 8.1L) (Steps 1 - 6)

Courtesy of GENERAL MOTORS CORP.

Fig 2: Cruise Control Inoperative/Malfunctioning (4.8L, 5.3L, 6.0L, 8.1L) (Steps 7 - 15)

Courtesy of GENERAL MOTORS CORP.

Fig 3: Cruise Control Inoperative/Malfunctioning (4.8L, 5.3L, 6.0L, 8.1L) (Steps 16 - 28)

Courtesy of GENERAL MOTORS CORP.