OEM GMC Envoy Air Suspension Compressor

GMC Envoy Air Suspension Compressor Parts and Q&A

• Compressor Assembly, Rear
  25978169
  Q: How to replace the Air Suspension Compressor on GMC Envoy?

  A:

  Start by putting on gloves and safety glasses and ear protection before replacing the Automatic Level Control Air Compressor. Wrap a clean cloth around the air supply lines as a precaution. Support the rear axle between D-Height and Full Jounce before depressurizing the air suspension system while removing the air suspension system fuse to prevent calibration problems. Remove the air suspension system fuse first then lift and stabilize the vehicle. Before proceeding disconnect the air inflator switch electrical connection along with the air supply lines and the air spring compressor vent hose from the air spring compressor and separate both the air spring compressor electrical connection and frame mounting bolt connections. The air supply lines need to receive matching colors to those of the air spring compressor before assembly occurs. The technician will detach air supply lines from the air spring compressor so he can remove the compressor from the vehicle. Visual inspection should reveal any damage on the air supply lines. The new compressor's fittings should be discarded in favor of using the existing fittings to link air supply lines to the air spring compressor by torquing them to 2.25 Nm (20 lb in). The diagnosis reveals heavy damage to the lines thus needing replacement. Start by connecting the air spring compressor electrical connection followed by the air inflator switch electrical connection and air supply line and air spring compressor vent hose. Fasten the air spring compressor to frame mounting bolts at 20 Nm (15 lb ft) torque and then lower the vehicle before reinstalling its air suspension system fuse. After vehicle startup check the air spring leveling system's proper operation by running the vehicle for one minute before inspecting D-height and conducting leak checks. Check the air supply lines connecting to the air spring compressor since any detected leaks require line replacement.
• Compressor Assembly, Rear
  19329771
  Q: How to Properly Install an Air Suspension Compressor on a GMC Envoy?

  A:

  The first step to replace an air spring compressor is removing the air suspension system fuse which stops calibration problems in the air suspension leveling sensor. The rear axle needs support at an angle between d-height and full jounce before completing air suspension system depressurization. First raise and support the vehicle before removing the air spring compressor mounting bolts. First disconnect the air inflator switch electrical connection from the compressor and then disconnect both supply lines and hose before disconnecting the electrical connection along with the supply lines . During reassembly check the air supply line coloring against the air spring compressor color scheme. Use fittings from the new compressor with existing fittings for the air supply lines then connect them to the compressor while tightening each connection to 2.25 nm (20 inch lbs.). The presence of any damage within air supply lines calls for replacement of those lines. Start by connecting the electrical wires for the air spring compressor before installing the air inflator trigger electrical wire and the air line tubing and hose. Connect the air spring compressor to the frame mounting bolts before securing them at 20 nm (15 ft. Lbs.). Bring down the vehicle after reinserting the fuse for the air suspension system then start the engine to run for one minute while monitoring the air spring leveling system. The final inspection checks d height as part of leak assessments. Leaks detected at air supply line connections require replacement of the entire air supply lines.