2002 GMC Sonoma Owner's Manual - Page 272

4WD Extended Cab 4.3L V6/Manual Trans. 4.3L V6/Manual Trans. w/ZR2 4.3L V6/Auto. Trans. 4.3L V6/Auto. Trans. w/ZR2 4WD Crew Cab 4.3L V6/Auto. Trans. 3.42 3.73 5,200 lbs. (2 361 kg) 5,200 lbs. (2 361 kg) 3.42 3.73 3.42 3.73 3.73 4,000 lbs. (1 816 kg) 4,200 lbs. (1 907 kg) 5,500 lbs. (2 497 kg) 5,500 lbs. (2 497 kg) 5,500 lbs. (2 497 kg) * If your vehicle is equipped with RPO V4A (Xtreme Sport Appearance Package), your vehicle was neither intended nor designed to tow a trailer. For more information on RPO codes, see "Service Parts Identification Label" in the Index. #If your vehicle is equipped with a code 5 engine you must use regular unleaded gasoline rated at 87 octane or higher when towing. Maximum trailer weight is calculated assuming the driver and one passenger are in the tow vehicle and it has all the required trailering equipment. The weight of additional optional equipment, passengers and cargo in the tow vehicle must be subtracted from the maximum trailer weight. The weight of the trailer tongue also affects trailering capacity. See "Weight of the Trailer Tongue" later in this section. **The Gross Combination Weight Rating (GCWR) is the total allowable weight of the completely loaded vehicle and trailer including any passengers, cargo, equipment and conversions. The GCWR for your vehicle should not be exceeded. t 4-54