Known problems
What goes wrong on the GM LML (6.6L V8 diesel)
critical
High-Pressure Fuel Pump Failure (CP4.2)
The high-pressure injection pump can fail internally, most often after water or poor fuel gets in, and send metal through the whole fuel system.
Typical repair cost
$8,000 – $14,000
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 LML (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 LML (6.6L V8 diesel)
Chevrolet Silverado 2500HD2011-2016
Chevrolet Silverado 3500HD2011-2016
GMC Sierra 2500HD2011-2016
GMC Sierra 3500HD2011-2016