I bought this unit to replace another aftermarket unit I installed last year. The other device didn't have built-in GPS, so I had to turn off Google Maps every month and the air interface was just bad. This device checked both boxes for me. It seems to be working fine as a radio/android tablet at the moment. Now for the not so good part. There is no actual manual, just a small booklet on some of the radio's features. If I didn't have to delete a similar radio, I'd be lost. I drive a 2007 Silverado LTZ. The LTZ has the same feature as the suburbs. If you have this dash or commuter/tahoe you will need to disassemble the dremel to remove a lot of the plastic behind the radio. Next comes a bunch of cables that you don't need. It's plug and play, but on the main wiring harness, once everything is hooked up, you have three exposed connectors that need to be connected to the OEM wiring harness. The problem is that the 2007 Silverado only has 2. To be honest, the old device was the same. My problem is that the extra connector has wires for the speakers in the tailgate. (according to the wiring list printed on the sticker on the radio). I don't have a rear seat entertainment system, just two speakers, one in each door. Then, while setting up this device, my year-old battery was so dead that I had to unplug the jump box. I contacted JBY TECH and they answered some questions in the best possible way. They're 12/13 hours from US Central Time, so it's a long process. As for the speakers in the rear doors, there is no answer. I received an email asking for feedback on my recent purchase. Maybe this is your way of ending my email questions. I think all Hizpo/Pumkin/Joying are done in one place (might be wrong) and they would be doing themselves a favor if they just had the best information on paper/PDF/YouTube for consumers. I will update if necessary
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