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Hi this is my first post,my truck is a 1999 gmc Sierra 2500 4x4 with 6.0 litre engine.I parked my truck for a few months and the battery went dead since the day I owned the truck the door locks never worked and I always used the factory key fob for locking and unlocking the doors.I have since swapped the door cylinder so I have a working drivers side lock that works with key.When the battery died I needed to get into the truck to open hood so I could service battery so I broke into truck.Now the truck starts immediately and then dies classic passlock symptoms.I have tried both relearn methods the 10 minute method and the 30 minute method.When the truck is sitting the security light is constantly on bright orange.When I try relearn procedures the security light alternates between flashing battery then back to security this continues and never stops flashing between the 2.I have always had battery charger hooked up to prevent battery dying.I dont know if this makes a difference I also pulled the abs fuse years ago I doubt this is a factor but I thought the more info I give the better quality awnsers I may get.The other thing I would like to disclose is that my key fob has lost its programming and needs to be reprogrammed to unlock doors,will this reprogram while passlock is active.Had fob checked at gm dealership it is functional. Any help greatly appreciated.
