[mrstevek79]

I have a 2000 Gmc Savana with a 4.3l 4l60e transmission. It has 183,000 miles. I could really use some help. It runs fine nuetral and park, when you put it in gear the speedo jumps, as you start to drive it the speedo quits working and the abs light comes on, the van doesn't shift right and it shuts off while driving for approximatly 10 sec's, then it runs fine for abut 30 sec's it seems to get worse the hotter it gets. The fuel pressure and spark are good when this happens. There are no trouble codes in the computer, I changed the Vehicle speed sensor, the battery and cleaned all the grounds. I have been chasing down wires for hours with no luck. Also this may not be related the fuel gauge vibrates constantly. Any ideas or help would be greatly appreciated.