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GMC
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2003
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Safari Van Cargo, AWD
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Repair and Diagnosis
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Transmission
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Automatic Trans
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Automatic Transmission - 4L60-E/4L65-E (Service & Replacement)
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Diagnostic Information and Procedures
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Electrical Function Check
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Manual Gear Range Selection
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Manual First
Manual First
With the vehicle stopped, move the gear selector to FIRST.
Accelerate the vehicle to 32 km/h (20 mph).
Verify the following:
No upshifts occur
The TCC does not apply
There is no noticeable slip, noise, or vibration