Installation Procedure

Install the radio rear speaker to the rear body side trim panel.
NOTE: Refer to FASTENER NOTICE in GM VEHICLES CAUTIONS & NOTICES article.
Install the radio rear speaker nuts.
Tighten

Tighten the radio rear speaker nuts to 1.2 N.m (11 lb in).

Fig 1: Locating Rear Speaker Components (Pickup)
Courtesy of GENERAL MOTORS CORP.
Connect the electrical connectors.
Install the rear body side trim panel. Refer to TRIM PANEL REPLACEMENT - BODY SIDE (STANDARD CAB PICKUP) , TRIM PANEL REPLACEMENT - BODY SIDE (EXTENDED CAB PICKUP) , TRIM PANEL REPLACEMENT - BODY SIDE (2-DOOR UTILITY) , TRIM PANEL REPLACEMENT - BODY SIDE (4-DOOR UTILITY) and TRIM PANEL REPLACEMENT - BODY SIDE (CREW CAB) in INTERIOR TRIM article.
Inspect for proper circuit operation.