Method 1: Pulling Straight Up (Most Common)
This is the most likely method for a 1990 Buick Century.
1. Shift into Park: This is crucial for safety and to prevent accidental movement of the shifter. Engage the parking brake as well.
2. Locate the Retaining Clip (if present): Some models have a small retaining clip or ring under the knob. You might need a small flathead screwdriver or similar tool to pry this up and release the knob. Look carefully around the base of the knob.
3. Pull Straight Up: If there's no retaining clip, firmly grasp the knob and pull straight up. It may require some force, but avoid yanking it violently. A good grip is important. If it doesn't budge easily, try adding a little wiggle motion as you pull upwards.
Method 2: Unscrewing
Less common, but possible:
1. Follow steps 1 and 2 from Method 1.
2. Try Unscrewing: If pulling straight up doesn't work, try gently twisting the knob counter-clockwise while pulling up slightly. Some shift knobs are threaded onto the shift lever.
If it's stuck:
* Penetrating Oil: If the knob is really stuck, try applying a small amount of penetrating oil (like WD-40) around the base of the knob. Let it sit for a few minutes to loosen any corrosion or debris. Then try either pulling or unscrewing again.
* Heat (Use Caution): As a last resort, you can try gently warming the base of the knob with a hairdryer. Heat can expand the plastic and help loosen it, but *be extremely careful* not to overheat or damage the surrounding interior components.
Important Note: If you're unsure about any step, consult a repair manual specific to your 1990 Buick Century. Improper removal could damage the shift lever or the interior. If you're uncomfortable doing this yourself, it's best to take your car to a mechanic.
