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Scosche GM21SR / GM21SRB

GM/LAN Amplified OnStar Integrated Harness for 2006-up Select GM / Chevrolet Vehicles Tahoe, Impala, etc

3.6

(11 reviews)

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Radio Replacement Interface for select GM / Chevrolet vehicles 2006-up. This Harness will allow you to retain Onstar, RAP & FACTORY AMPLIFIERS (Bose, Monsoon etc.). It is not included in our standard free harness offer when a head unit is purchased.
  • Radio replacement interface
  • Designed for 2007-up GM vehicles with OnStar, RAP and Factory Amplifiers
  • This Product Retains the Following Factory Equipped Features:
    • Standard Bose
    • OnStar
    • Warning Chimes
    • Folding Mirrors (Including Reverse)
    • Park Assist (Front/Rear)
    • Heated Seats
    • AC Fan Speed
    • Turn Signal
  • Compatible with RAP systems (Retained Accessory Power)
  • 2007 GMC Yukon (WITH FACTORY AMPS)
  • 2007 Chevrolet Suburban (WITH FACTORY AMPS)
  • 2007 Chevrolet Tahoe (WITH FACTORY AMPS)
  • 2006-2007 Chevrolet Monte Carlo (WITH FACTORY AMPS)
  • 2006-2007 Chevrolet Impala (WITH FACTORY AMPS)
  • 2007 Chevrolet Avalanche (WITH FACTORY AMPS)
  • Retains OnStar functionality, warning chimes, and parking assist chimes.
  • Not compatible with Denali
  • NOTE: Not for use on Premium Bose Sound Systems, includes Y91/Z75 Bose. Code may be found in the service parts sticker (normally in glove box)
  • 1-year SonicElectronix.com warranty
Harness Features
Vehicle Sound SystemPremium Sound
Harness TypeAmplifier Integration
Compatible Vehicle MakeBuick
Cadillac
Chevrolet
HUMMER
Oldsmobile
Plymouth
Pontiac
Compatible Vehicle Years2007
2006
Premium Harness Features
Factory System AmplificationAmplified
Compatible Premium Audio SystemsStandard Bose
On-Star CompatibleYes
CAN-BUS CompatibleNo
GM-LAN CompatibleYes
Compatible with Aftermarket Navigation SystemsNo
Chime RetentionYes
Warranty and Return Policy
Return Policy Standard Return Policy
Parts Warranty Duration1 year
Labor Warranty Duration1 year
Warranty ProviderManufacturer
Customer Review Summary for Scosche GM21SR / GM21SRB
Average Customer Rating is 3.6 out of 5 stars:
3.6
based on 11 Reviews
Share your thoughts with others:
Rating Distribution:
5 star:
.
.
27%
4 star:
.
.
45%
3 star:
.
0%
2 star:
.
.
18%
1 star:
.
.
9%
what's this?
Average Attributes Rating:
Durability
3.5
Value
3.2
Features
3.8
Design
3.5
Usability
4.0
what's this?
Quick Comparison:
Most Helpful Customer Reviews:
November 21, 2011 good product
1 of 1 people found the following review helpful:
Review by
Jack from Thayer, MO
Overall
Durability
Value
Features
Design
Usability
Essential part of system.
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March 8, 2011 It works.
1 of 1 people found the following review helpful:
Review by
Richard from Humble, TX
Overall
Durability
Value
Features
Design
Usability
I have a 2007 New body Silverado with Bose and On-Star. There are 4 connectors that plug into this box that are not very secure at all, but I ran tie-wraps around them to make a tight connection. Once everything was put in, I was able to retain the factory amplifier, door chimes, blinkers, OnStar and everything else. Also, my factory Bose speakers sounded 1000 times better.
Beware, the actual box is pretty big, and there are alot of wires coming to/from it, so it makes it a pain to stuff it all in your dash, especially with iPod controllers, amplifier RCA cables and etc. I had to cut a piece of plastic from the dash with a sawzall to make it all fit.
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November 8, 2010 controls
1 of 1 people found the following review helpful:
Review by
gerone from Gladewater, TX
Overall
Durability
Value
Features
Design
Usability
great
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October 29, 2009 Not bad
1 of 1 people found the following review helpful:
Review by
Luke from Carbondale, CO
Overall
Durability
Value
Features
Design
Usability
This product works well, i had trouble at first with the wire connections coming loose inside the dash but I electrical taped them in tight to make connection and it works fine now. only other complaint is stuffing it in behind a dvd player what a pain! Other than that it does what its supposed to and im happy
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September 11, 2009 If you have an 09 GM - Caution
1 of 1 people found the following review helpful:
Review by
waynet from socal
Overall
Durability
Value
Features
Design
Usability
Unit works fine in my 09 Silverado, EXCEPT there apparently is no way to control Onstar volume. According to Scosche, the steering wheel or dimmer procedure to control onstar volume doesn't work in the 09s.
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View All 11 Reviews for Scosche GM21SR / GM21SRB

Product Summary

Manufacturer: Scosche
Model number: GM21SR
UPC: 033991016231
Weight: 0.75 lbs
Internal SKU: gm21sr
Internal product ID: 9414

Price Information

$169.99

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$139.99

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Customer Testimonial

Brendon was great! Answered all my questions, dedicated to his job as well as being knowledgeable - a type of person you need in a company like sonic. Returned my phone calls right away. I had recommended my father in law to go to you to buy some dj equipment! Thanks again Brendon.

- tj from pa

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