If your Silverado 1500 has clutch problems, like:
* High clutch engagement point (pedal is too high): This isn't adjustable. The most likely cause is either worn clutch components (pressure plate, disc, throwout bearing) or a problem with the hydraulic system (low fluid, air in the lines, master or slave cylinder failure).
* Low clutch engagement point (pedal is too low): Again, not adjustable. This often points to a problem with the hydraulic system, specifically a leak somewhere in the lines, master cylinder, or slave cylinder. It *could* also indicate a problem with the clutch itself, but a low pedal is almost always hydraulic-related.
* Clutch slipping (engine revs but truck doesn't accelerate): This indicates worn clutch components (friction disc) or possibly low transmission fluid.
* Clutch dragging (engine struggles even in neutral): Points to a problem with the throwout bearing or potentially the slave cylinder.
What to do if you're experiencing clutch problems:
1. Check the clutch fluid level: It's located in a reservoir, usually near the master cylinder. Low fluid is a common issue and can be easily remedied by topping it off (with the correct DOT 3 or DOT 4 brake fluid). *Never mix brake fluids.*
2. Check for leaks: Inspect the clutch master cylinder, slave cylinder, and hydraulic lines for leaks.
3. Bleed the clutch hydraulic system: Air in the lines can cause problems with clutch engagement. Bleeding the system is often a simple DIY fix, but you'll need a helper. There are many tutorials available online specific to the 2004 Silverado 1500.
4. If problems persist: The problem is likely within the clutch assembly itself or a failed component in the hydraulic system. This requires professional repair. Replacing a clutch requires specialized tools and knowledge; attempting this repair yourself without experience is strongly discouraged.
In short: Don't try to "adjust" the clutch. Instead, diagnose the specific problem you're experiencing and address the underlying cause. Likely, this requires a mechanic's expertise unless the issue is simply low fluid.