in appropriate injector's, clocked injector nozzle's, injector pump diaphram ,(due to dirt fuel)
The diesel engine is an option.
Stoped up air filter. Check it and if it is okay then you need to ask your question again with The year,engine size, and model so that will help us answer your question alittle better. THANK YOU.
Usually in a removable housing at the engine end of the upper radiator hose
The 2008 GMC Sierra-2500HD has a V8 engine.
The 2013 Chevrolet Silverado-2500HD has a V8 engine.
The 2002 Chevrolet Silverado-2500HD has a V8 engine.
The 2012 Chevrolet Silverado-2500HD has a V8 engine.
The 2002 GMC Sierra-2500HD has a V8 engine.
The 2007 GMC Sierra-2500HD has a V8 engine.
The 2009 Chevrolet Silverado-2500HD has a V8 engine.
The 2006 GMC Sierra-2500HD has a V8 engine.
The 2009 GMC Sierra-2500HD has a V8 engine.