GM reports that the clutch pedals on some 2005-09 Chevy Corvettes may engage very close to the floor. According to the car maker, the problem usually will be accompanied by shifting difficulties or gear clash, and is most likely due to design flaws in the clutch pressure plate and disc.
To make the diagnosis, inspect the clutch hydraulic system for leaks or damage. Repair or replace parts as necessary. Next, make sure the fluid level in the clutch master cylinder is okay, topping off as required. Now get under the dash and pull the clutch pedal up until it hits the top stop. This is important because the fill port to the master cylinder isn't uncovered until the pedal is up to the top of its stroke.
Once the pedal is up to the stop, recheck the fluid level in the master cylinder, again adding brake fluid as necessary. Now go on a road test and check the performance of the clutch. If the pedal engagement is normal and the shifting is smooth, you're done with the fix. If not, replace the clutch disc and pressure plate with updated units (part No. 24248985 for the set).
"Factory Fixes" is written by Jim DePalma, a 30-year veteran of the auto repair business who has served stints as a service manager, parts manager and ASE-certified technician. His column provides vehicle manufacturers' authentic factory technical service bulletins (TSBs) that have been condensed for easier reading. Mr. DePalma advises that techs always check with a dealer or repair information system for the latest revisions before starting to work on a vehicle. He can be reached via e-mail at [email protected].