2010 Hummer H3 Owner's Manual - Page 233

Driving and Operating 5. Simultaneously press and hold the Four-Wheel High and Four-Wheel-Low Lock buttons for 10 seconds. The Neutral light will come on when the transfer case shift to Neutral is complete. 6. Press and hold the regular brake pedal and shift the transmission to R (Reverse), then shift the transmission to D (Drive) for an automatic transmission, or 1 (First) for vehicles have a manual transmission and then let out the clutch. This is to ensure the transfer case is in Neutral. If not, repeat this procedure starting at Step 3. 7. Turn the engine off. 8. Place the transmission shift lever in P (Park) for an automatic transmission, or 1 (First) for vehicles that have a manual transmission. 9. Turn the ignition to LOCK/OFF. Shifting Out of Neutral To shift out of Neutral: 1. Set the parking brake and apply the regular brake pedal. 2. Shift the transmission to N (Neutral) for an automatic transmission, or press the clutch pedal for vehicles that have a manual transmission. Then turn the ignition to ON/RUN but do not start the engine. 3. Press the button for the desired transfer case shift position (Four-Wheel High, Four-Wheel-High Lock or Four-Wheel-Low Lock). 9-49 After the transfer case has shifted out of Neutral the light will go out. 4. Release the parking brake. Notice: Shifting the transmission into gear before the indicator light stops flashing could cause damage to the transfer case. Always wait until the indicator light stops flashing before putting the transmission back in gear. 5. You may start the engine and shift the transmission to the desired position.