Fits: 2011 thru 2016 Chevy Silverado/GMC Sierra 2500HD/3500HD LML Duramax Diesel

If your CP4 pump has failed and sent metal throughout the system, it would be a good idea to replace the injector return line as well.

Replaces Part#:

• GM 12639000
• GM 12633835
• Bosch 0445130020