Serpentine belt came apart on the highway. Parked it. Went to auto parts store and purchased new belt. Drove truck home. The new belt came apart a day later. Figured out the steering pump was going bad. Put another new belt on, had truck towed to shop and had a new pump, HP hose and tensioner pulley installed. Now the new belt I bought will not fit. It sits outside of the idler pulley, instead of going around it on the inside. I've checked and rechecked the part number, and cannot find anything wrong. 1994 GMC C1500 with 350 engine, without air pump, with A/C. Dayco part is 5060995. I'm assuming either the new pump pulley or the new tensioner pulley is a different size? Look at the attached photo and give me an idea of what size belt I should try. The 506995 is 95.5 inches long.
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