






🔊 Upgrade your ride’s sound system without the hassle—plug in, play loud!
The Scosche SHGM03B Car Speaker Wiring Harness Adapter offers a perfect, no-cut fit for select 1984-2009 GM vehicles, enabling quick installation of aftermarket speakers. Crafted from durable OEM-quality materials, it ensures superior sound clarity and reliable connections. Ideal for both DIYers and professionals, this adapter supports all speaker types and comes with Scosche’s lifetime warranty and tech support, making it the smart choice for upgrading your car audio experience.











| ASIN | B001TDKJUI |
| Best Sellers Rank | #89 in Car Speaker Wiring Harnesses #1,186 in Car Audio & Video Wiring Harnesses |
| Brand | Scosche |
| Connector Type | Speaker Connectors |
| Customer Reviews | 4.4 4.4 out of 5 stars (498) |
| Date First Available | February 14, 2009 |
| Global Trade Identification Number | 00033991004887 |
| Item Weight | 0.608 ounces |
| Item dimensions L x W x H | 0.5 x 4.38 x 7.5 inches |
| Item model number | SHGM03B |
| Manufacturer | SCOSCHE |
| Material | Acrylonitrile Butadiene Styrene |
| Product Dimensions | 0.5 x 4.38 x 7.5 inches |
| UPC | 033991004887 |
| Warranty | Backed by Scosche’s Lifetime Tech Support and Lifetime Limited Warranty |
E**C
Scosche SHGM03B 1985 and Up GM Universal Speaker wire set up
I purchased the Pioneer 1674 speaker set along with Scosche SHGM03B 1985 and Up GM Universal Speaker wire set up. This made installing my speakers in my 2000 Silverado, a piece of cake. I snapped my speaker wires into the universal wire set which made installation so easy. No soldering or crimping of wires. I used my factory speaker retainers and popped them into the door. No screws! The speakers sounded great. I new my old ones were bad but I didn't know how bad till I heard these new speakers. Wow.
S**Y
Chevy Tahoe
Used this to wire rear tweeters in my 2007 Chevy Tahoe. Hooked right up to the aftermarket speakers I was using and worked flawlessly. Highly recommended.
A**R
Exactly as needed for C5 Z06
These adapters plugged right into factor speaker wiring harness.
D**Y
Tight Connection - Small Spkr Connectors
I used this harness to install after market speakers in a 2011 Impala. The connection from the harness to the car, is a REALLY tight fit! The harnesses connectors for the after market speakers are REALLY small! I ended up cutting them off and using the ones that came with the after market speakers. I didn't give this harness a 5 Star rating because of the small connectors, but the harness worked for me and I'd do recommend this product.
A**A
Perfect
Perfect Fit a 2004 Chevy 3500
M**K
Awesome
These speaker harnesses are awesome. The thing I tried to look at the most when reading other reviews was the year and models people were using them on. So here's mine: 2000 chevy silverado (new body style in that year). It is nice to have an adapter that I just plug into the trucks wiring harness, and in the future when I need to swap or replace the speaker I am not having to cut and resplice a bunch of wires.
C**Z
Doesn't fit
Does not fit 2006 Pontiac Grand Prix Gt with Monsoon.
J**E
worked great
fits on my 2012 impala. fit the stock wiring harness just about perfectly- was a bit tight, but went- same on the other ends(s) was a bit tough getting em on the speaker terminals- but again went, with coaxing. Note- the speaker ends--- the wire is split on the speaker end and has a small and large female "speaker" slide on thingie terminals. which matched my new speakers perfect (jbl)...so if your speaker have those standard plain terminals (one small, one large)- you're golden. PSS- i dont think the picture is correct either
A**R
Used for a 2000 Chevrolet Silverado 2500, way quicker than just hard wiring new speakers in. Plugged in directly to the factory harness
A**Y
Bought for my '08 Cobalt. No issues at all, not really much to say about them
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