New serpentine belt won't stay on, keeps jumping off.
Not having the tensioner pulley lined up would do it.
All of the pulleys have to be in a straight line and the tensioner has to keep the belt tight, especially with extra load from one of the accessories.
SOURCE: 1989 GMC Jimmy Serpentine belt diagram for an idiot, please!
if it came of it came of for a reason, spin all pulleys to see if one is bad including the alternater, a/c, and pwr. steering pump
SOURCE: Serpentine belt popping off
First, make certain the routing is correct. There is a label on the fan shroud or bottom side of hood near the latch that will show you the correct routing.
Second, if the new pump and or pulley ( if reused) is not aligned properly, the belt will "walk" off the pulley very quickly. Use a straight edge or ruler to make certain the power steering pulley is "square" with the rest of the pulleys.
Good luck, let me know.
Regards,
SOURCE: 1996 GMC 1500 Pickup.
if you keep blowing a fuse there's a good chance it's not a faulty part but a short in the main harness most likely under the dash where all the connectors tend to get brittle over time and short out constantly. also check the ecm connection there is a 60 pin type.
SOURCE: serpentine belt diagram for a GMC 2003
if you just changed the alternator you should do the belt too,if you get your belt from Auto zone or NAPA the belt routing is on the back of the package
SOURCE: how to replace fuel pump on 2001 gmc pickup 3/4
the fuel pump is inside the fuel tank. some techs just lower the fuel tank down, others remove the bed. personaly dropping the tank is harder, but lifting off the bed requires about 4 strong people.
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