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2. Start engine. Allow engine to idle with transmission in Park or Neutral for 40 seconds. 3. The following conditions must be followed to run certain OBD-II monitors that require engine to be under a load. On A/T models, select OVERDRIVE CANCEL to perform test in 3rd gear. On all models, 4. Accelerate steadily to 3rd gear (A/T) or 4th gear (M/T) and keep engine speed at 1500 RPM for 3 seconds. Accelerate steadily from 35 MPH to 65 MPH in about 15 seconds (A/T) or 11 seconds minimum 5. On A/T models, drive vehicle in 4th gear continuously for one minute. Accelerate steadily from a full stop to 4th gear and then return to a full stop. Repeat this procedure 10 times, then go to next step. 6. Before continuing, use NGS tester and select EOT PID from PID/DATA MONITOR & RECORD menu. Ensure EOT PID value is more than 140°F (60°C). Allow engine to idle for 20 seconds in Park or 7. If DTC P1000 is present after performing drive cycle, repeat step 4 maintaining a minimum MFDES PID value of 37 milligrams/stroke with engine speed at more than 1500 RPM for 11 seconds. Also, maintain a GENERAL MOTORS DRIVE CYCLE (1996-2000 MODELS) Description Several states require that a vehicle pass On-Board Diagnostic (OBD) system tests and the I/M emission The System Status display indicates only if the PCM has completed the required tests (DTCs). The System WARNING: Strict observance of posted speed limits and attention to driving NOTE: A Drive Cycle may be referred to as Inspection/Maintenance (I/M) Complete
1998 Chevrolet Pickup C1500 DRIVE CYCLES OBD-II Vehicles - OBD-II Readiness Monitors
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