2003 GMC Envoy Owner's Manual - Page 97

Shifting Out of 4LO To shift from 4LO to 4HI, A4WD or 2HI your vehicle must be stopped or moving less than 2 mph (3.2 km/h) with the transmission in NEUTRAL (N) and the engine running. The preferred method for shifting out of 4LO is to have your vehicle moving 1 or 2 mph (1.6 to 3.2 km/h). Turn the knob to 4HI, A4WD or 2HI. You must wait for the 4HI, A4WD or 2HI indicator light to stop flashing and remain illuminated before shifting your transmission into gear. If the 4HI, A4WD or 2HI knob is turned when your vehicle is in gear and/or moving, the 4HI, A4WD or 2HI indicator light will flash for 30 seconds but will not complete the shift unless your vehicle is moving less than 2 mph (3.2 km/h) with the transmission in NEUTRAL (N). 6. Turn the transfer case knob all of the way past 4LO and hold it there for a minimum of 10 seconds. The neutral indicator light will come on. 7. Shift the transmission to REVERSE (R) for one second, then shift the transmission to DRIVE (D) for one second. 8. Place the transmission shift lever in PARK (P). 9. Turn the ignition to LOCK. 10. Release the parking brake prior to towing. Shifting Out of NEUTRAL To shift the transfer case out of NEUTRAL, do the following: 1. Set the parking brake and apply the regular brake pedal. 2. Start the vehicle with the transmission in PARK (P). Shifting into NEUTRAL Before shifting the transfer case to NEUTRAL, first make sure the vehicle is parked so that it will not roll. 3. Turn the transfer case knob to the desired shift position (2HI, 4HI or A4WD). 4. Put the transmission in NEUTRAL (N). 5. After the transfer case has shifted out of NEUTRAL, the indicator light will go out. Shift the transmission lever to the desired position. 1. Set the parking brake. 2. Start the vehicle. 3. Connect the vehicle to the towing vehicle. 4. Put the transmission in NEUTRAL (N). 5. Shift the transfer case to 2HI. A re-engagement sound is normal when shifting out of NEUTRAL. 2-28