Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Shift Control
The PCM instantly determines which gear should be selected by various signals sent from sensors and switches, and it actuates the shift solenoid valves A, B, C, and D to control gear selection.
The shift control on the seven-position transmission includes the automatic shift control in D (1st through 5th gears) and D3 (1st through 3rd gears), the grade logic control, and the shift-hold control.
The shift control on the five-position transmission includes the automatic shift control in D (1st through 5th gears) and S (1st through 4th gears), manual shift mode control in D (D-paddle shift mode) and S (sequential sportshift mode), the grade logic control, and the shift-hold control.
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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