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Models affected: 2008 and prior GM passenger cars andtrucks (including Saturn); 2003-’08 Hummer H2; 2006-’08 Hummer H3; and2005-’08 Saab 9-7X with gasoline or diesel engines.

In 2005, General Motors consolidated the use of all liquidgaskets/engine sealants. At that time, two sealants replaced allprevious sealants referred to in service information and/or the servicemanual.

In 2007, GM consolidated to one engine sealant already available ina 150 g cartridge and now in a 75 g aluminum tube. As a result, P/N12346141, 54 g tube, has been deleted from service.

One of these, engine sealant P/N 12378521 (U.S.) and P/N 88901148(Canada), was released in a cartridge to be used in a conventionalcaulking gun. The cartridge and conventional caulking gun proved to betoo large and cumbersome in certain instances when used in on-vehicleservice.

To address this concern, GM Powertrain Engineering released theengine sealant in a 0.075 kg (75 gram) squeeze tube (packaged six tothe carton, with nozzles) along with a new essential service tool,Sealant Dispenser GE-48326.

Sealant Guidelines
The GM Powertrain engineeringspecification for applying this sealant is an even bead, 3 mm (.118?)in diameter. Due to the high viscosity of the sealant, a dispenser isrequired to meet this specification. The GE-48326 Sealant Dispenserprovides the ability to apply the sealant to specification using onehand, even in areas not accessible, using the P/N 12378521 EngineSealant cartridge and caulking gun.

This solitary engine sealant available in tubes and small cartridgeis compatible with all synthetic, synthetic blends and mineral oils, aswell as all engine coolants including DEX-COOL. The maximum workingtime of this sealant is 20 minutes. The sealant will be fully cured in24 hours. The assembly may be filled with oil or coolant immediatelyafter applying the sealant and tightening the bolts.

The 0.075 kg (75 gram) squeeze tube is not  available for 2008 and prior Saturn models (only in 150 g cartridges).

Courtesy of ALLDATA.

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