Hi everyone. I just purchased a 2007 1500 crew cab with the 5.3l. It's only had one owner and I know him. He purchased the vehicle brand new from a local dealership. I'm pulling a 4800 lbs dry 25 feet long. I'm trying to get a hard number on the towing capacity so I can make sure i load everything ok before pulling the trailer. First I called a chevy dealer in the area and they tried telling me it only has a capacity of 5600 lbs. I know for sure this isn't right. I checked the manual but it looks like they have my truck rated at 7500 lbs. So, I call chevy directly and the guy tells me that the capacity is 8500 lbs. I asked the guy if my VIN shows the trailer package and he says no. If it has a trailer package then it must be dealer installed and the capacity will be different. Probably 10,500 but he isn't sure. so next i call the dealership that my friend purchased the truck from brand new and they said the trailer package is dealer installed and they emailed me the build (if you want me to I can forward you the email). on the build it shows that the truck has the z71 package and the truck says z71 on the side of it. However, the build also shows "Z82 HD trailering equipment". this is the portion that was dealer installed and they are telling me the capacity is 10,500 too. Can a truck be a z71 and a z82? I'm not sure I trust what they are telling me. Can anyone help me know for sure what my towing capacity is?