GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1999 🢒 GMC K Pickup - 4WD (CNG) 🢒 Brakes 🢒 Hydraulic Brakes 🢒 Combination Valve Replacement

Removal Procedure
  1. Remove the engine control unit (ECU) bracket. Refer to Engine Control Unit Bracket Replacement in Engine Controls - 5.0, 5.7L.
  2. Remove the combination valve.

Installation Procedure
  1. Install the combination valve.
  2. Install the engine control unit (ECU) bracket. Refer to Engine Control Unit Bracket Replacement in Engine Controls - 5.0, 5.7L.