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Home >> Chevrolet >> 2006 >> Silverado 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1660 (Engine Control System & Fuel System - 6.6L (LMM) - Troubleshooting And Diagnosis) >> Charge Air Cooler Diagnosis (Full System Air Leak Test) >> J 46091-1 Pressure Regulator Adjustment

J 46091-1 Pressure Regulator Adjustment

WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 GMC Cab & Chassis Sierra, 2010 Chevrolet Silverado, and 2010 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Some J 46091-1 regulators may have the adjusting knob riveted in place. The rivet head must be drilled out with a 5/16 inch drill bit before adjustment. Do not drill more than 1/8 inch in depth, or just enough to remove the rivet head. The rivet shaft does not have to be removed from the regulator.
  1. Connect the EN 47603:  Gauge Adapter compression adapter to the J 46091:  Tester gauge set and connect shop air to the J 46091:  Tester.
  2. Open the shutoff valve, then slowly turn the regulator on the J 46091:  Tester clockwise until the gauge reads 206 kPa (30 psi).
  3. Close the air supply valve and remove the EN 47603:  Gauge Adapter from the gauge assembly.
  4. The gauge set is now calibrated to perform the test.
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