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Home >> GMC >> 2006 >> Sierra 1500 HD, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1350 (Automatic Transmission - 2ML70 - Removal & Installation, Service, Overhaul, Troubleshooting & Diagnosis) >> Diagnostic Information and Procedures >> Road Test >> Manual Downshifts >> Accelerating Upshifts

Accelerating Upshifts

WARNING: This page is about a different car, the 2009 GMC Sierra and 2009 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Place the gear selector in the M position.
  2. Press the - until the display shows M1.
  3. Accelerate slowly and keep the throttle steady not going over 3,000 RPM Engine speed.
  4. Press the + on the gear selector.
  5. Verify the upshift occurs as commanded. Repeat step 4 to verify the remaining gears.
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