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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 981 (Battery, Charging System & Starting System) >> Repair Instructions >> Hybrid Control Module (HCM) Replacement (5.3L Engine w/RPO HP2) >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: View Of HCM Bracket (5.3L Engine w/RPO HP2)
    GM1237051Courtesy of GENERAL MOTORS CORP.
  1. Install the HCM to the bracket.
  2. Install the HCM bracket (5) to the fan shroud.
    NOTE: Refer to Fastener Notice in Cautions and Notices.
  3. Install the HCM bracket bolts (3, 4).

    Tighten:  Tighten the bolts to 9 N.m (80 lb in).

    4. Fig 2: View Of HCM Bracket & Bolts (5.3L Engine w/RPO HP2)
    GM1206683Courtesy of GENERAL MOTORS CORP.
  4. Install the radiator hose to the clip.
  5. Close the hose clamp on top of the fan shroud.
  6. Connect the HCM electrical connector.
    1. Install the electrical connector.
    2. Slide the gray lever rearward completely until it locks.
    7. Fig 3: View Of Hybrid Control Module Electrical Connector (5.3L Engine w/RPO HP2)
    GM1237059Courtesy of GENERAL MOTORS CORP.
  7. Connect the ESB. Refer to Energy Storage Box (ESB) Service Disconnect/Connect (5.3L Engine w/RPO HP2) .
  8. Program the HCM. Refer to Service Programming System (SPS) in Vehicle Control Systems.
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