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  1. Instrument cluster panel and HVAC controls went dead. No indications but it runs and lights all work, no AC. After trying to determine if a power issue/fuse, I took a break and checked the next morning and it WORKS. Intermittent power issue or computer? Any thoughts or suggestions would be appreciated. I’m looking for 2018 Silverado 2500HD electrical drawings. Where can I find Electrical drawings??? Free would be great but I’m willing to pay if necessary.
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