Inspecting Radiator and Heater Hose Clamps and Seals for Leaks During Pre-Delivery Inspection (PDI)

This bulletin is being revised to add the 2008 model year. Please discard Corporate Bulletin Number 06-06-02-014 (Section 06 -- Engine/Propulsion System).

The purpose of this bulletin is to inform dealers of required inspection of underhood and under vehicle radiator and heater hose clamps and seals for leaks and/or seepage during pre-delivery inspection (PDI).

Field feedback indicates that some customers may notice engine coolant leaks shortly after delivery, which may result in an immediate decline of customer satisfaction with their new vehicle purchase.

When performing a PDI on a vehicle listed in the models affected above, pay specific attention to the effectiveness of the engine coolant hose seal locations. Reposition/reclamp or replace the clamp to effect a proper system seal prior to customer delivery.

Dealership personnel should examine the following locations closely during PDI (4.2L LL8 application shown in graphics below; refer to SI for specific information on 5.3L LH6 and 6.0L LS2):

1. Radiator inlet hose (upper hose) to radiator (1).
2. Radiator inlet hose (upper hose) to engine (2).



3. Radiator outlet hose (lower hose) to engine (3). (Shown as viewed from below.)



4. Radiator outlet hose (lower hose) to radiator (4). (Shown as viewed from below.)



5. Heater inlet hose to engine (5).



6. Heater outlet hose to engine (6).



7. Heater inlet hose to front of dash (7).
8. Heater outlet hose to front of dash (8).

For inspection, payment is already included in your automatic Z7000 PDI payment.

For correction of a leak or seepage, use the appropriate labor operation code and time.

For inspection, payment is already included in your automatic PDI payment.

For vehicles repaired under warranty, use: