I'm confused. Your GVWR is 7,200. That means, without a trailer, you should be able to safely drive that vehicle loaded with crap in the back that weighs 7,200 (total weight or truck plus all cargo).
You are pulling a total of 9,400, correct? And you have the trailer package (which usually means set up with a receiver and light/brake plug. Sometimes there are some transmission changes when you switch it on. A quick google search came up with this for a 2020:
The
towing capacity of the 2020 GMC Sierra 1500 varies based on the engine and configuration. Here are the key towing capacities:
- 6.2L V8 engine: Up to 12,100 lbs with the Max Trailering Package.
[url=https://www.bing.com/ck/a?!&&p=385a648c4271126906944a70e97df71973284b9bbbdb02f319428ff532045025JmltdHM9MTc1OTM2MzIwMA&ptn=3&ver=2&hsh=4&fclid=0b147cab-8ef5-6dda-29eb-6db78f0e6c81&u=a1aHR0cHM6Ly90YWlsb3JlZHRydWNrcy5jb20vYmxvZy8yMDIwLWdtYy1zaWVycmEtMTUwMC10b3dpbmctY2FwYWNpdHkv&ntb=1][/url]
2 - 5.3L V8 engine: Ranges from 9,300 to 11,300 lbs.
[url=https://www.bing.com/ck/a?!&&p=385a648c4271126906944a70e97df71973284b9bbbdb02f319428ff532045025JmltdHM9MTc1OTM2MzIwMA&ptn=3&ver=2&hsh=4&fclid=0b147cab-8ef5-6dda-29eb-6db78f0e6c81&u=a1aHR0cHM6Ly90YWlsb3JlZHRydWNrcy5jb20vYmxvZy8yMDIwLWdtYy1zaWVycmEtMTUwMC10b3dpbmctY2FwYWNpdHkv&ntb=1][/url]
2 - 2.7L Turbo I4 engine: Ranges from 6,500 to 6,900 lbs.
[url=https://www.bing.com/ck/a?!&&p=385a648c4271126906944a70e97df71973284b9bbbdb02f319428ff532045025JmltdHM9MTc1OTM2MzIwMA&ptn=3&ver=2&hsh=4&fclid=0b147cab-8ef5-6dda-29eb-6db78f0e6c81&u=a1aHR0cHM6Ly90YWlsb3JlZHRydWNrcy5jb20vYmxvZy8yMDIwLWdtYy1zaWVycmEtMTUwMC10b3dpbmctY2FwYWNpdHkv&ntb=1][/url]
2 - 4.3L V6 engine: Ranges from 7,400 to 7,900 lbs.
[url=https://www.bing.com/ck/a?!&&p=385a648c4271126906944a70e97df71973284b9bbbdb02f319428ff532045025JmltdHM9MTc1OTM2MzIwMA&ptn=3&ver=2&hsh=4&fclid=0b147cab-8ef5-6dda-29eb-6db78f0e6c81&u=a1aHR0cHM6Ly90YWlsb3JlZHRydWNrcy5jb20vYmxvZy8yMDIwLWdtYy1zaWVycmEtMTUwMC10b3dpbmctY2FwYWNpdHkv&ntb=1][/url]
2 - 3.0L Duramax Turbo Diesel: Ranges from 7,300 to 9,100 lbs.
[url=https://www.bing.com/ck/a?!&&p=385a648c4271126906944a70e97df71973284b9bbbdb02f319428ff532045025JmltdHM9MTc1OTM2MzIwMA&ptn=3&ver=2&hsh=4&fclid=0b147cab-8ef5-6dda-29eb-6db78f0e6c81&u=a1aHR0cHM6Ly90YWlsb3JlZHRydWNrcy5jb20vYmxvZy8yMDIwLWdtYy1zaWVycmEtMTUwMC10b3dpbmctY2FwYWNpdHkv&ntb=1][/url]
2
For the most accurate towing capacity, always refer to your vehicle's manual or contact your local dealer.
Look at the information plate on your driver's side door. As long as you have at least the 5.3, I wouldn't sweat 9400. Don't haul mule and I wouldn't think you would have any issues.