GM 91172478
Filter

Begin your work on the automatic transmission fluid filter by taking out the level indicator followed by securely putting up the vehicle. The service starts with disconnecting the front propeller shaft and removing four nuts and four bolts from front differential pinion flange for vehicles equipped with four-wheel drive. The pinion flange yoke can then be detached from the flange. First place a draining pan under the transmission Drain Plug and then assist the Transfer Case to prevent the front differential propeller shaft from touching the transmission fluid pan. Start by removing the 14 transmission fluid pan bolts then detach the pan with its gasket followed by the separation of the solenoid harness. Begin by removing the six Valve Body bolts and then proceed to take out the fluid filter screen and its gasket and spacer with attached gasket alongside the spacer gasket. A small amount of clutch material inside the pan is ordinary while excessive material indicates that transmission removal and inspection is necessary. Apply solvent to clean the fluid filter screen then allow it to air dry before checking for damage which requires a replacement in case of detection. Also dry and inspect the transmission fluid pan together with its magnets and transmission fluid pan bolts before reinstalling. New gaskets and fluid filter screen components should be set onto the Valve Body before bolting them down using six fasteners at 5 nm (44 inch lbs.). The procedure requires installation of the solenoid harness followed by proper attachment of the filler tube and then the application of new transmission fluid pan gasket secured by fourteen bolts tightened to 5 nm (44 inch lbs.). First tighten the Drain Plug of the transmission by turning it to 17 nm torque before reinstalling the propeller shaft followed by lowering the vehicle down. The transmission requires a filling of approximately 2.5 liters (2.6 quarts) of dexron iii automatic transmission fluid gm p/n 12346143. Place the fluid into the filler tube before reinstalling the fluid level indicator. Apply brake parking and block the wheels before starting the engine at idle speed while moving the selector through each gear range one-by-one to finish in park position. The transmission requires dexron iii automatic transmission fluid gm p/n 12346143 to reach the full hot mark and the process calls for adding 0.3 liters (0.3 quarts). The test should include both a road test and transmission level inspection.

A small amount of clutch material is normal, but large amounts or metal shavings indicate the need for transmission disassembly and inspection.