| Subject: | Engine Oil Cooler Hose Replacement | 
| Models: | 1999 Cadillac Escalade | 
| 1999 Chevrolet and GMC C/K Pickup and Utility Models | 
| 1999 Chevrolet and GMC G Van Models | 
| with 5.0L, 5.7L, or 6.0L V8 Engine (VINs M, R, U -- RPOs L30, L31, LQ4) | 
| Built between February 26, 1999 and March 8, 1999 | 
This bulletin is being revised to correct the engine oil cooler hose build date. Please discard Corporate Bulletin Number 99-06-01-017 (Section 06 -- Engine/Propulsion System).
This bulletin is being issued to inform dealers that when replacing the engine oil cooler hose on the above listed vehicles, do not use a replacement hose with a 12/23/98 build date. The build date can be found on the rubber hose portion of the line. There will be a series of white letters and numbers followed by the build date. The affected part numbers are listed below.
Part Number  | Description  | Application  | 
|---|---|---|
15996516  | Hose, Eng. Oil Cooler, Inlet  | K1,2 (L30)  | 
15996517  | Hose, Eng. Oil Cooler, Outlet  | K1,2 (L30)  | 
15725587  | Hose, Eng. Oil Cooler  | CK2 (LQ4)  | 
15736419  | Hose, Eng. Oil Cooler, Inlet  | G2,3 (L31)  | 
15736420  | Hose, Eng. Oil Cooler, Outlet  | G2,3 (L31)  | 
15985759  | Hose, Eng. Oil Cooler, Inlet  | C1,2 (L30)  | 
15985760  | Hose, Eng. Oil Cooler, Outlet  | C1,2 (L30)  |