Hello,i'm Alessandro from Italy...i own a 1986 Buick electra estate wagon,can the ecm have an influence on the correct automatic transmission operations?...

SOURCE: where do I find a

Your Larger City Libraries carry the Haynes and Chilton Manual for Repair. Instead of paying the $$$$ For the Book just get them there. Please Rate my Response, I need all the Help That I can Get! Thanks!

SOURCE: Heater Core Replacement for 1986 Buick Electra Park Ave

there is no easy way to change out a heater core...you have to take the bottom part of the dash loose and that takes some doing. once you get the bottom of the dash apart you will see the heater core.then you have to go under the hood and unhook both water lines that run to it, you should then be able to pull the heater core out and install the new one

SOURCE: location fuse boxes 1991 buick roadmaster estate wagon

one under the hood another drivers side kick panel.  Also check the relays

SOURCE: Sqeaky engine noise

yes it sounds like you may have a belt issue, may have deteriorated of the the two year span, on the other hand it may be a pulley issue two, you wont know until you change the belt

SOURCE: what is the firing order of a 1987 buick electra

Hope this helps.