2004.5–2005 Chevy/GMC 6.6L LLY Duramax Diesel
The 2004.5–2005 Chevy and GMC trucks with the 6.6L LLY Duramax diesel engine offer impressive power, improved cooling efficiency, and reliable towing performance. Zero Tolerance Diesel keeps these trucks running at their best with expert maintenance, tuning, and upgrades.
