2008 gmc sierra speaker

Question edited for clarity and toss in some CAPS.
Question moved to model category.

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2006 Chevrolet Silverado 1500 Stereo Wiring Diagram

https://www.modifiedlife.com > 2006-chevrolet-silvera...
2006 Chevrolet Silverado 1500 Speaker Wiring Guide ; Left Rear Speaker Positive Wire (+), Brown ; Left Rear Speaker Negative Wire (-), Yellow ; Right Rear Speaker ...

Detailed with schematic

GMC Sierra 1500 2006 - SYSTEM WIRING DIAGRAMS

https://portal-diagnostov.com > 2020/04/13 > radio-gm...
Apr 13, 2020 - RADIO - GMC Sierra 1500 2006 - SYSTEM WIRING DIAGRAMS Base Radio Wiring Diagram. Get Access all wiring diagrams car. Mid-Line Radio Wiring ...

2006 GMC SIERRA STEREO PIN OUT WIRING DIAGRAM

https://www.gm-trucks.com > forums > topic > 249614-...
May 4, 2021 - I'm trying to install an aftermarket stereo on a 2006 GMC Sierra ... Can someone please help me out with my truck stereo wiring diagram.
2006 Sierra 1500 SLT Bose stereo wiring diagram
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Wiring Color Code for Radio - GM-Trucks.com
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If your 2008 GMC Sierra has power and everything works but you don't have sound from the Power Acoustik WMH7-S1 after wiring it in, here are some steps you can follow to try and troubleshoot the issue:

1. Check the wiring: Make sure all the wires are properly connected and tightened. Confirm that the ground wire is securely connected to the vehicle's chassis.
2. Check the fuses: Make sure the fuses for the audio system are not blown. Check both the main audio fuse and the subwoofer fuse if applicable.
3. Check the speaker wiring: Confirm that the speaker wiring is correct, with the correct polarity (positive to positive, negative to negative).
4. Test the head unit: If you have a multimeter, you can use it to test the head unit's output voltage. The voltage should be between 11 and 14 volts DC. If the voltage is too low, the head unit may not be providing enough power to the speakers.
5. Check the speakers: If you have a multimeter, you can use it to test the speakers. Confirm that they have continuity, and that the speaker wiring is not damaged or shorted.

If you've tried these steps and are still experiencing issues, you may want to consider consulting a professional to help diagnose and resolve the problem.

Did you try testing the speaker (not working) with an alternate music source?

If the speaker works, have you checked for continuity of the wiring?

KNOWN PROBLEM IS THE AMP IF EQUIPPED. ALSO HAVE ISSUE WITH THE HEAD UNIT (RADIO) HOPE THIS HELPS

These are the radio wiring colors on the 2003 GMC Sierra:
• Car Radio illumination wire: Brown
• Radio ground wire: White/Black
• Stereo Amp trigger wire: Pink
• Stereo dimmer wire: Gray
• Left front speaker + wire: Tan
• Left front speaer - wire: Gray
• Right front speaker - wire: Dark green
• Right front speaker + wire: Light green
• Left rear speaker - wire: Yellow
• Left rear speaker + wire: Brown
• Right rear speaker - wire: Light blue
• Right rear speaker + wire: Dark blue

2002 GMC Sierra C1500 Car Radio Wire Color Codes
Car Radio Battery Constant 12v+ Wire: Orange
Car Radio Accessory Switched 12v+ Wire: Yellow
Car Radio Ground Wire: Black/White
Car Radio Illumination Wire: Brown
Car Stereo Dimmer Wire: Gray
Car Stereo Amplifier Location: Under the center console.
Left Front Speaker Positive Wire (+): Tan
Left Front Speaker Negative Wire (-): Gray
Right Front Speaker Positive Wire (+): Light Green
Right Front Speaker Negative Wire (-): Dark Green
Car Audio Rear Speakers Size: N/A
Car Audio Rear Speakers Location: N/A
Left Rear Speaker Positive Wire (+): Brown
Left Rear Speaker Negative Wire (-): Yellow
Right Rear Speaker Positive Wire (+): Dark Blue
Right Rear Speaker Negative Wire (-): Light Blue

sorry but the panel needs removed, go on be brave its not all that hard to do .adrian,,

Here ya go. enjoy!
2002 GMC Sierra C1500 Car Radio Wire Color Codes
Car Radio Battery Constant 12v+ Wire: Orange
Car Radio Accessory Switched 12v+ Wire: Yellow
Car Radio Ground Wire: Black/White
Car Radio Illumination Wire: Brown
Car Stereo Dimmer Wire: Gray
Car Stereo Antenna Trigger Wire: N/A
Car Stereo Amp Trigger Wire: N/A
Car Stereo Amplifier Location: Under the center console.
Car Audio Front Speakers Size: N/A
Car Audio Front Speakers Location: N/A
Left Front Speaker Positive Wire (+): Tan
Left Front Speaker Negative Wire (-): Gray
Right Front Speaker Positive Wire (+): Light Green
Right Front Speaker Negative Wire (-): Dark Green
Car Audio Rear Speakers Size: N/A
Car Audio Rear Speakers Location: N/A
Left Rear Speaker Positive Wire (+): Brown
Left Rear Speaker Negative Wire (-): Yellow
Right Rear Speaker Positive Wire (+): Dark Blue
Right Rear Speaker Negative Wire (-): Light Blue

dont need a diagram,, most amps have a speaker level input...dont mix this up with line level....connect your wires from back of factory speakers to speaker level input on amp...then if your amp has a low pass switch select lowpass setting now you have punch

Those are 5 Inch Speakers and Tweeters I do Believe.