2013 Chevrolet Silverado 2500 HD Crew Cab Owner Manual - Page 454

10-78 Vehicle Care Front Position - All Other Models Position the jack under the vehicle, as shown. If the flat tire is on the front of the vehicle (all other models), position the jack on the frame behind the flat tire. Rear Position - 1500 Models 5. If the flat tire is on the rear, for 1500 models position the jack under the rear axle about 5 cm (2 in) inboard of the shock absorber bracket. Rear Position - All Other Models For all other models, position the jack under the rear axle between the spring anchor and the shock absorber bracket. If a snow plow has been added to the front of the vehicle, lower the snow plow fully before raising the vehicle. Make sure that the jack head is positioned so that the rear axle is resting securely between the grooves that are on the jack head.