1997 GMC Sonoma Owner's Manual - Page 190
1997 GMC Sonoma Manual
Page 190 highlights
Maximum trailer weight is calculated assuming the driver and one passenger are inthe 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. Two-wheel-drive models with a GVWR of 4,200 Ibs. (1 907 kg) and four-wheel-drive models with the ZR2 suspension package are limited to a 2,000 Ibs. (908 kg) trailer rating. You can ask your dealer forour trailering information or advice, or you can write us at the address listed in your Warranty and Owner Assistance Information Booklet. In Canada, write to: General Motors of Canada Limited Customer Communication Centre 1908 Colonel Sam Drive Oshawa, Ontario LlH 8P7 Weight of the Trailer Tongue The tongue load (A) of any trailer is an important weight to measure because it affects the total or gross weight of your vehicle. The Gross Vehicle Weight (GVW) includes the curb weight of the vehicle, any cargo you may carry in it, and the people who will be riding in the vehicle. And if you will tow a trailer, you must add the tongue load to the GVW because your vehicle will be carrying that weight, too. See "Loading Your Vehicle'' in the Index for more information about your vehicle's maximum load capacity. A B 4-52