Behind the panel on the right hand side in the cargo area.
2004 GMC Envoy is on page 28 http://documents.victorytechnologies.com//documents/product/929.pdf 2004 GMC Envoy is on page 28 http://documents.victorytechnologies.com//documents/product/929.pdf
ok first thing you need to do is go to a radio store and buy the right plug that is made for your truck.they will tell you there what plug you will need,and everything else is easy from their wires should be color coded then it will be easy to install.
It is probably the output amplifier chip.
if the radio came out of same truck nothing is needed to do should be already set up and vin in radio. if you switched radio from another truck into this one it needs to be programmed and set up at a dealer.
The older radios are easy to remove. Pull the knobs off the front and there's nuts benind them. It should take a 9/16th deep barrell socket to remove them. There may be a bracket on the back of the radio in the dash. After that, pull it out from the rear and unplug the wires. That's it.
2004 GMC Envoy is on page 28 http://documents.victorytechnologies.com//documents/product/929.pdf 2004 GMC Envoy is on page 28 http://documents.victorytechnologies.com//documents/product/929.pdf
To replace a broken radio antenna on a 2004 GMC Envoy you need to unscrew the old antenna. Next, place the new antenna in the hole and screw into place.
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If the 2004 GMC Envoy came with a tow package, then there should be a trailer brake controller harness. It would be located up under the dash near the brake pedal.
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The AC recharge port on a 2004 GMC envoy is on the low pressure connection. It is the larger of two hoses near the firewall.
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