Subject: | Turbo Charge Air Cooler Hose Oil Seepage, or Dislodged On Acceleration |
Models: | 2004-2007 Chevrolet Express, Kodiak, Silverado Classic |
2004-2007 GMC Savana, Sierra Classic, TopKick |
Equipped with the LBZ or LLY 6.6L Diesel Engine |
This PI Was Superseded To Include The 2007 Model Year. Please Discard PIP3068C.
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Oil seepage from turbo charge air cooler hoses, or charge air cooler hose becomes dislodged during acceleration.
It is possible to have DTC P0299.
Kent Moore tools are listed below.
• | 2001-2005 C/K trucks equipped with the 6.6 LB7 and LLY Diesel Engine - Tool Number J-46091. |
• | 2006 C/K trucks equipped with the 6.6 LBZ or LLY Diesel Engine - Tool Number J-46091-5. |
• | 2006 G Van Equipped with the 6.6 LLY Diesel Engine - Tool Number J-46091-10. |
There is a new procedure for testing air charge cooler systems. At this time, the Charge Air Cooler Diagnosis (Full System Air Leak Test) can be found in the SI diagnostics for the 2007 model diesel engine vehicles. This full system test can be used on older model vehicles equipped with the Duramax Diesel Engine.
Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.