We were thinking about upgrading our 1 ton gas 8ft bed , too the Chevy HD 3500 turbo diesel 15,000GVW 10 ft bed. Was wondering if anyone had one of these, if they liked them, or they thought the Isuzu might be a better option. As of now,I feel the gas dump is underpowered when pulling a full load with 16 ft trailer up hills. Im also looking to hold more volume. Thanks!