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  1. J

    Oil Pressure Gage malfunction using 4x4

    New to forum! I've owned a 1999 Tahoe (5.7) for about 3 months and with the winter months upon us here in IA been using 4 x 4- Noticed yesterday that whenever the front drive shaft would kick in during 'auto' 4x4 the oil pressure gage drops to 0 and the 'check gages' dummy light comes on...
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