* Shift-on-the-fly: This allows you to engage 4WD while the vehicle is moving (usually at low speeds, under 25 mph). There's usually a rotary dial or a switch on the center console or dashboard. The exact location and labeling varies by year and model. Look for markings like "2WD," "4HI" (4-wheel high), and "4LO" (4-wheel low).
* Part-time 4WD with a transfer case lever: Older Silverados may use a floor-mounted lever near the gear shift. This lever will have positions for 2WD, 4HI, and 4LO. You *must* be stopped to shift into or out of 4WD with this type of system.
To engage 4-wheel drive, follow these general steps:
1. Check your surroundings: Ensure you are in a safe location with sufficient space to maneuver. Avoid engaging 4WD on dry pavement unless absolutely necessary.
2. Slow down (or stop): If your Silverado has a shift-on-the-fly system, reduce your speed to below 25 mph (or as recommended in your owner's manual). If it's a part-time 4WD system, you MUST be completely stopped.
3. Engage 4HI (4-wheel high): Locate the appropriate control (rotary dial or lever) and move it to the "4HI" position. You might hear a brief engagement sound.
4. Engage 4LO (4-wheel low – optional): For extremely difficult terrain, such as mud, snow, or steep inclines, you can engage "4LO." This will give you more torque at low speeds. Again, you usually must be completely stopped to do this.
Important Considerations:
* Consult your owner's manual: This is the most reliable source of information specific to your Silverado's 4WD system. The location of the controls and the specific steps for engaging 4WD will vary depending on your model and year.
* Driving in 4WD: Avoid driving in 4WD on dry pavement for extended periods, as this can cause drivetrain damage. Engage 4WD only when necessary for traction in slippery conditions.
* 4LO (4-wheel low): This should only be used for situations requiring significant extra torque at very low speeds. Driving on pavement in 4LO is highly discouraged.
Without knowing the specific year and model of your Silverado, I can only provide these general instructions. Always refer to your owner's manual for the most accurate and safest procedures.
