My wives 03 Tahoe did the same thing, then a few days later nothing on the passenger side would work. Turned out it was the RH Door module. The 03's and up have a different wiring system. Most everything is module's now.
Hi Guys , Its likely the regulator. My pass. side went at 39k and the drivers just went at 50k. These regulators are built pretty flimsy, the bicycle cable they use (not stainless) to transmit motion corrodes and the strands break one by one until it either jams or finally breaks.
I removed my regulators and had them restrung with S.S. cable at a fraction of what the general wanted (200 + $ for complete assy when only cables are bad). Save the bad regulators for rebuilding then you wont have to remove door panels twice. Not sure if they will give you the old regulator on warranty repair but try.
The rear window regulator went out on my 2000 Buick (GM) They wanted $400.00 for the repair.( out of warranty) I told them this was ridiculous (42000 mi-3 yr old car(at the time) rear window that no one ever used. ) GM paid. The next time (other rear window) there was no discussion at all. I told them of the problem, they said GM would take care of it. no charge and they didn't need to call GM for approval.
Mine did something similar and coincidentally my remote door locks would stop working intermittently. When I had the truck in for the Service 4WD LIght fix I asked the service guys to look at the lock/window problem. I'm not sure what they did, but everything works fine now.
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