2003 GMC Sonoma Owner's Manual - Page 249

In rare cases when it's unavoidable and your vehicle must be towed with two wheels on the ground, the propeller shaft to axle yoke orientation should be marked and the propeller shaft removed following the applicable service manual removal/installation procedure. See Service Publications Ordering Information on page 7-11. Dust or dirt can enter the back of the transmission through the opening created by removing the propeller shaft if proper protection is not provided. Also, check the transmission fluid level before driving the vehicle. Use the following steps to dolly tow your vehicle: 1. Put the front wheels on a dolly 2. Put the vehicle in PARK (P). case into NEUTRAL can cause your vehicle to roll even if the transmission is in Park (P) for an automatic transmission, or if your vehicle is in gear, for a manual transmission. You or others could be injured. Make sure the parking brake is firmly set before you shift the transfer case to NEUTRAL. 3. Set the parking brake and then remove the key. 4. Disconnect the propshaft as described above. 5. Clamp the steering wheel in a straight-ahead position with a clamping device designed for towing. If your vehicle has four-wheel-drive it cannot be dolly towed. A four-wheel-drive vehicle must be towed by flatbed. 6. Release the parking brake. Be sure to use the proper towing equipment designed for recreational vehicle towing. Follow the instructions for the towing equipment. 4-48