GM Authority

Everything To Know About DEF With The GM Duramax 3.0L LZ0 Engine

Diesel engines like the 3.0L Duramax require special maintenance, including the use of DEF, or Diesel Exhaust Fluid. Now, GM ...
Jalopnik

EPA Says We Don't Really Need 'Low DEF' Limp Mode In Trucks After All

These new regulations actually violate the EPA's requirements already on the books for diesel vehicles using DEF. From the EPA's own website, one such requirement is: Tamper Prevention System: The ...
The Drive

EPA Tells Truck Makers to Stop Forcing Immediate Limp Mode for Low DEF

The United States Environmental Protection Agency is on a roll when it comes to undoing past regulations and directives. Now, EPA Administrator Lee Zeldin is urging truck and engine manufacturers to ...
GM Authority

EPA Tells Diesel Engine Manufacturers To Stop Forcing Power Loss When DEF Runs Out

The Environmental Protection Agency (EPA) has issued new guidance regarding diesel exhaust fluid (DEF) systems in diesel engines that cause trucks and tractors to enter “limp mode” when DEF levels are ...