2005 gmc envoy_slt
Hey guys, 05 Envoy SLT, 34000 miles. I have an underhood whine/howl when it is cold that tends to go away when it is warm. When I start it in the garage I hear the whine/whistle sound only but last week we had sub-zero high temps and when I would start it to warm it up before going home from work it will squeel the belt for 10-15 seconds, only in severe cold when the vehicle has sat for several hours. I took it in to the dealer and they replaced the idler pulley and it sounded fine when I left the dealers warm shop. When it sat outside my noise came back again. I have an appt. for it on Tuesday again and am planning on parking it outside the dealer Monday nite so the mechanic can start it when cold, hope the belt squeels for him. Any ideas on what the problem is??? Dealer said I won't have to pay my deductable on my extended warranty again since they didn't find the problem the first time so thats good. Ideas appreciated.