OT:2000 chevy clutch

2000 Chevy Silverado 2500 6.0 liter 5 speed manual trans. Working perfectly last weekend when I parked it in the barn. Clutch in, start engine, won't go in any gear?! Clutch felt normal at first but 2nd try, went to the floor. Clutch pedal to floor, no resistance, won't go into gear. Shut off, goes in all gears ok. Leave it in reverse, clutch to floor, start engine, truck shoots backward 2 foot til hits machinery (no damage) & shut it off. Start it up in neutral, no clutch but pumping clutch & I get pressure, shift into 1st & 2nd ok. Shut off again, no clutch. Start, pump clutch up, shifts into gears, then no clutch again. Brake & clutch reservoirs full, no leaks visible on lines or on the ground. Never did this before; failed slave cylinder, by-pass valve? Naturally it couldn't be just this simple: when it started in reverse gear & shot backwards, drivers door was open & caught barn siding & bent door so it wouldn't close. Handyman jack & floor jack, a 4x4 & an hour later door closes but doesn't fit right & only opens 1/3rd of the way (I can squeeze in & out). Bent hinges & I doubt they can be straightened. So any guesses or experiences?

Wad it low on fluid in the clutch mater cylinder?

If so, the clutch slave cylinder is probably leaking.

If NOT low on fluid, the master cylinder is the likely culprit.

i had brand new 97 2500 and that happened, it was the slave cyclinder. warranty work. they had to pull tranny to repair.

Since it is not low,I would suspect the clutch master cylinder.Mark

no. all three reservoirs that operate with brake fluid all full. Power steering operates off brake master cylinder. Clutch uses brake fluid but I don't know if it is connected to brake system or not. From your reply & others, I see it must be.

(quoted from post at 00:04:17 11/02/17) no. all three reservoirs that operate with brake fluid all full. Power steering operates off brake master cylinder. Clutch uses brake fluid but I don't know if it is connected to brake system or not. From your reply & others, I see it must be.

Click to expand...

Just to be clear this up... you got it backwards, power brake assist "hydroboost" uses pressure from the power steering pump to boost the brakes... in lieu of a vacuum brake booster.

Power steering pump uses PS fluid.

Brake master cylinder is on it's own, and uses brake fluid, as does the hydraulic clutch master cylinder, also on it's own, NO connection between the clutch and brake master cylinders in this application.