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Cooling System - DEX-COOL(R) Coolant Leak Detection Dye

Bulletin No.: 05-06-02-002B

Date: January 18, 2008

INFORMATION

Subject:
DEX-COOL(R) Coolant - New Leak Detection Dye J 46366 - Replaces J 29545-6

Models:
1996-2008 GM Passenger Cars and Light/Medium Duty Trucks* (including Saturn)
1997-2008 Isuzu T-Series Medium Duty Tilt Cab Models Built in Janesville and Flint
1999-2008 Isuzu N-Series Medium Duty Commercial Models with 5.7L or 6.0L Gas Engine

2003-2008 HUMMER H2
2006-2008 HUMMER H3
2005-2008 Saab 9-7X

*EXCLUDING 2006 and Prior Chevrolet Aveo, Epica, Optra, Vivant and Pontiac Matiz, Wave

Supercede:

This bulletin is being revised to include additional model years. Please discard Corporate Bulletin Number 05-06-02-002A (Section 06 - Engine/Propulsion System).

Leak detection dye P/N 12378563 (J 29545-6) (in Canada P/N 88900915) may cause DEX-COOL(R) coolant to appear green in a black vessel making it appear to be conventional (green) coolant. This may cause a technician to add conventional coolant to a low DEX-COOL(R) system thus contaminating it. The green DEX-COOL(R) appearance is caused by the color of the leak detection dye which alters the color of the DEX-COOL(R) coolant.

A new leak detection dye P/N 89022219 (J 46366) (in Canada P/N 89022220) has been released that does not alter the appearance of the DEX-COOL(R) coolant. When adding the new leak detection dye the color of the DEX-COOL(R) coolant will not change. For detecting leaks on any system that uses DEX-COOL(R) leak detection dye P/N 89022219 (in Canada P/N 89022220) should be used. The new leak detection dye can be used with both conventional and DEX-COOL(R) coolant.





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