2009 Chevrolet Silverado 2500 HD Extended Cab Owner's Manual - Page 406

Leaving After Parking on a Hill 1. Apply and hold the brake pedal while you: Trailer Wiring Harness The vehicle is equipped with one of the following wiring harnesses for towing a trailer or hauling a slide-in camper. • Start the engine • Shift into a gear • Release the parking brake 2. Let up on the brake pedal. 3. Drive slowly until the trailer is clear of the chocks. 4. Stop and have someone pick up and store the chocks. Basic Trailer Wiring All regular, extended cab and crew cab pickups have a seven-wire trailer towing harness. For vehicles not equipped with heavy duty trailering, the harness is secured to the vehicle's frame behind the spare tire mount. The harness requires the installation of a trailer connector, which is available through your dealer/retailer. If towing a light-duty trailer with a standard four-way round pin connector, an adapter is available from your dealer/retailer. Maintenance When Trailer Towing The vehicle needs service more often when pulling a trailer. See this manual's Maintenance Schedule or Index for more information. Things that are especially important in trailer operation are automatic transmission fluid, engine oil, axle lubricant, belts, cooling system and brake system. It is a good idea to inspect these before and during the trip. Check periodically to see that all hitch nuts and bolts are tight. 4-78