Trany Trouble codes

I recently had engine trouble codes: P0758 (Shift Solenoid B Circuit Electrical), and P0758 (Shift Timing Solenoid Malfunction) come up my 1996 GMC Jimmy causing the transmission to malfunction. To make a long story short, when I took it to my mechanic it turned out the problem was the transmission fuse. I was replaced and immediately the problem was fixed!

I have been reading past threads stating the the usual problem with this turns out to be the IGNITION SWITCH, but I am wondering exactly what to replace....whether its the WIRING, the CYLYNDER, HARNESS....Can someone give me advice??

Thanks!

Well, just an update...this seems to happen to my jimmy every few months. The fuse gets blown, and it seems like its skipping gears.

I have been reading past threads stating the the usual problem with this turns out to be the IGNITION SWITCH, but I am wondering exactly what to replace....whether its the WIRING, the CYLYNDER, HARNESS....Can someone give me advice??

Thanks!

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