First, Welcome to the site!!!! Now if your going to get into a 01-02 the most common issue with them were injectors, and even still its not real common. GM has an extended warrenty on these trucks for injectors to 200k IIRC. Other than that the trans will hold great just dont tune it with more than a 90 hp tune or you risk having problems with it. OR if you get a stick truck the dual mass flywheels were a problem but if you get that fixed they will take all the power u want!!!!!
Hope this helps
Caleb
Hope this helps
Caleb