98 envoy no 4 wheel drive

By junglejet2003
January 4, 2003 in 1982-2005 Chevrolet S-10/Blazer & GMC S15/Sonoma/Jimmy

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junglejet2003

Posted January 4, 2003

4 wheel drive not working in either 4hi or 4lo. Sounds like transfer case is engaging but front wheels don't spin in snow. Had the vaccum servo replaced under the battery. No fix! Just replaced the front diff fluid also. Is there a fuse blown or something just I'm missing? Can I check to see if I'm really getting vaccum at the servo some how?

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