Automatic Transmission Fluid and Filter Replacement for GMC Truck Sierra Classic - 2WD 2007

Important: DO NOT drain the fluid if only the transmission external oil filter is being replaced.

1. Remove the drain plug (6) and drain plug seal (5). Drain the transmission fluid into a suitable container.
2. Inspect the drained fluid. Refer to Transmission Fluid Check .

Important: Use a standard strap-type filter wrench to remove the transmission external oil filter.

3. Remove the filter (4) by rotating in the counterclockwise direction.
4. Remove the magnet (2) from the filter adapter (1) in the converter housing or from the top of the transmission external oil filter (3).
5. Clean any metal debris from the magnet. Presence of any metal pieces larger than dust may indicate that transmission replacement or overhaul is required.

1. Install the magnet (2) onto the filter adapter (1) which is in the converter housing.
2. Lubricate the gasket (3) on the transmission external oil filter with transmission fluid.
3. Install, by hand, the transmission external oil filter (4) until the gasket on the filter touches the converter housing.

Notice: Turning the transmission external oil filter more than ONE FULL TURN after gasket contact will damage the filter and may cause fluid leakage.

4. Turn the filter ONE FULL TURN ONLY after gasket contact.

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

5. Install the drain plug (6) and drain plug seal (5).

Tighten
Tighten the drain plug to 35 N·m (26 lb ft).

6. Refill Transmission with DEXRON®VI Automatic Transmission Fluid. Refer to Fluid Capacity Specifications .

Important: DTC P0701 may often set following fluid service. Cycling the ignition clears the code and allows Drive or Reverse range to be attained.

7. Cycle the ignition until Drive or Reverse range is attained.

Important: Fluid remains in the external circuits and transmission cavities after draining the transmission.

8. Check the transmission fluid level. Refer to Transmission Fluid Check .