Installation Procedure

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Install the radio mounting bracket. Perform the following steps:
1. Attach the HVAC harness to the radio mounting bracket with the clip.
  CAUTION: Refer to FASTENER NOTICE .
2. Install the screws (2) in order to retain the radio mounting bracket (1) to the instrument panel carrier.
  Tighten
  
  Tighten the screws to 3 N.m (27 lb in).
Fig 1: Installing Radio Mounting Bracket
Courtesy of GENERAL MOTORS CORP.
Connect the electrical/audio and antenna cable connectors to the radio.
Install the radio to the support bracket (1).
Align the radio locator tab into the support bracket locator hole.
Install the radio screws (2).
Tighten

Tighten the screws to 2 N.m (18 lb in).
Install the instrument cluster panel. Refer to TRIM PLATE BEZEL REPLACEMENT - INSTRUMENT PANEL (I/P) CLUSTER .
Calibrate the new radio assembly. Refer to Service Programming System (SPS) Description .

Fig 2: Installing Radio
Courtesy of GENERAL MOTORS CORP.