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Last Updated: September 29, 2026
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A vehicle that shifts violently or locks itself into second gear at a stoplight is usually suffering from a hydraulic monitoring issue. A vehicle that feels it is towing a heavy anchor from a dead stop is usually suffering from a major transmission control issue. The video focuses on the basic GMC specific diagnostic Want a clearer way to diagnose DTCs and complex vehicle problems? Join the STEP Diagnostics early access list: ...
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