Surprising DGF429 vs TP1015: 2017-2020 Duramax Compatibility & 3.0L Efficiency (Diesel Fuel)
Surprising DGF429 vs TP1015: 2017-2020 Duramax Compatibility & 3.0L Efficiency (Diesel Fuel)
When we tested the Doc’s DGF429 against the original TP1015, the results were unexpectedly smooth. This filter seamlessly fits Chevrolet and GMC 6.6L and 3.0L Duramax engines from 2017 onward, eliminating the need for generic replacements that often fall short. For the 3.0L models, we noticed a subtle but noticeable improvement in fuel flow, likely due to its refined design. While the TP1015 remains a trusted standard, the DGF429’s adaptability across 2017-2019 and 2020+ trucks makes it a versatile upgrade. Its sturdy construction and reliable performance have given us peace of mind, though we’d caution against assuming it’s a direct drop-in for older models-some tweaks might be necessary. Overall, we’d say this filter is a solid choice for any Duramax owner looking for an upgrade without sacrificing quality.









