Well after 10 years and 228,xxx miles, I think my alternator's days are numbered. My question is: I have the single alternator. Which one do I need? The 105 amp or 145 amp. I have the window sticker and there was no mention of alternator's on it. For some reason I thought it had a 145 on it and the 105's were used in dual alternator optioned trucks. If they are interchangeable I'll get a 145 because it would keep up with the snow plow better. Thanks