Preliminary Checks for GMC Truck Yukon Denali 2000

Identify the problem and the probable cause before attempting to repair the following components for any reason other than obvious failure:

A large percentage of clutch and manual transmission problems include the following conditions:

Carefully analyze the problems with the aid of the diagnostic tables.

Before removing what you suspect to be a failed hydraulic clutch system, check the reservoir fluid level with the actuator cylinder in place. Fill the reservoir to the specified level with GM Delco Supreme No. ll® Brake Fluid (GM P/N 1052535), or equivalent fluid, that meets the DOT 3 specifications. Do not overfill the system.

If the reservoir requires any fluid, check the hydraulic system components for leakage. Remove the rubber boots from the cylinders, checking for leakage past the pistons. A slight wetting of the surfaces is acceptable. Excessive leakage requires replacement of the system.