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2007 chevy silverado 1500: cd player/radio..antenna..troubleshoot

Customer Question
i have a 2007 chevy...
i have a 2007 chevy silverado 1500 classic with the cd player/radio but have had poor reception of all bands of radio stations. i need to see schematics of the antenna setup for this vehicle to see if i can troubleshoot this problem.
Submitted: 10 years ago.Category: Chevy
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Answered in 2 hours by:
5/7/2007
Chevy Mechanic: Bob, Auto Tech replied 10 years ago
Bob
Bob, Auto Tech
Category: Chevy
Satisfied Customers: 4,087
Experience: Plus 40 years GM, over 30 certified with Chevrolet, ASE certified Master Tech. (Expired, Retired)
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HiCustomer I am going to send you some pictures of the radio antenna cable routing and maybe a couple of other things. Maybe more than one post. I hope part of it may be of use to you. Thanks

Document ID#(NNN) NNN-NNNN
2007 Chevrolet Silverado - 4WD

 

Radio Antenna Cable Extension Cable Replacement


Object Number:(NNN) NNN-NNNN Size: MF

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Chevy Mechanic: Bob, Auto Tech replied 10 years ago

Fixed Antenna Replacement


Object Number:(NNN) NNN-NNNN Size: MF
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Chevy Mechanic: Bob, Auto Tech replied 10 years ago
Ext
Object Number:(NNN) NNN-NNNN Size: MF
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Chevy Mechanic: Bob, Auto Tech replied 10 years ago
Document ID#(NNN) NNN-NNNN
2007 Chevrolet Silverado - 4WD

Subject:Poor radio reception - keywords antenna AM FM mast tool #PIT3839 - (01/10/2006)

 

Models:2001-2002 Chevrolet Old Body Style Trucks and Utilities
2001 -2002 GMC Old Body Style Trucks and Utilities
2002-2006 Cadillac Escalade Models
2001-2006 Chevrolet Avalanche, Tahoe, Suburban
2001-2006 GMC Yukon Models

 



The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

Condition/Concern:

Some customers may complain about poor radio reception on Full Size Trucks and Utilities. This concern may be related to a loose radio antenna mast .

Recommendation/Instructions:

In an effort to allow the dealer and subsequently the customer to properly tighten their radio antenna mast to the base, a new orange or black plastic "wrench" will be shipped attached to the antenna mast starting mid-April, 2001.Dealers should utilize this tool to properly attached the mast to the base and then remove the plastic orange or black wrench and place it in the glove box for the owner's use later.

Note: The only way to order a replacement wrench is to order a new antenna mast assembly.

Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.

 

Bob
Bob, Auto Tech
Category: Chevy
Satisfied Customers: 4,087
Experience: Plus 40 years GM, over 30 certified with Chevrolet, ASE certified Master Tech. (Expired, Retired)
Verified
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Chevy Mechanic: Bob, Auto Tech replied 10 years ago

Found this also, may help. Let me know how it goes. Thanks

  1. With the ignition OFF, disconnect the antenna cable from the radio. With a DMM, verify there is less than 0.20 ohm between the negative battery cable and the coaxial cable metal outer shield.
    If greater than 0.20 ohm, test the antenna mast base for proper ground to the body. If antenna is properly grounded replace the antenna coax cable.
  2. Disconnect the coax cable from the antenna mast. With a DMM, verify there is less than 3.5 ohms between the radio end coaxial cable conductor and the antenna end coaxial cable conductor.
    If greater than 3.5 ohms, replace the coax cable.
    If no problems are found with the coax cable or the grounding of the antenna mast replace the radio.
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