Known problems
What goes wrong on the GM L5P (6.6L V8 diesel)
major
Diesel Emissions System Faults (DEF, DPF, NOx sensors)
The emissions hardware is the most common source of warning lights and limp mode, especially on trucks driven mostly on short trips.
Typical repair cost
$800 – $4,000
Which of these apply to your GM L5P (6.6L V8 diesel)?
Your guide shows which apply to the exact car, and what to ask the seller.
Where it was used
Cars with the GM L5P (6.6L V8 diesel)
Chevrolet Silverado 2500HD2017-2025
Chevrolet Silverado 3500HD2017-2025
GMC Sierra 2500HD2017-2025
GMC Sierra 3500HD2017-2025