2003 GMC Sonoma Owner's Manual - Page 247
2003 GMC Sonoma Manual
Page 247 highlights
Dinghy Towing In rare cases when it's unavoidable and your vehicle must be towed with all four 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 7-1 1. 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. When towing your vehicle, turn the ignition to OFF. To prevent your battery from draining while towing, remove the RDO BATT and CLSTR fuses from the instrument panel fuse block. Be sure to replace the fuse when you reach your destination. See Fuses and Circuit Breakers on page5-95. Be sure to use the proper towing equipment designed for recreational vehicle towing. Follow the instructions for the towing equipment. Two-Wheel Drive Vehicles Only Notices Towing your vehicle with all four wheels on the ground will damage drivetrain components. Your two-wheel-drive vehicle should not be towed with all four wheels on the ground. Your transmission has no provision for internal lubrication while being towed. To properly to your vehicle, it should be placed on a platform trailer with all four wheels off the ground. Towing with all four wheels on the ground should be avoided. 4-46