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Username Post: 88 K3500 7.4L no knock sensor, no ESC Module
Senior Member
Posts: 3768
Loc: Northern MN
Reg: 10-27-04
02-20-12 08:17 PM - Post#2193166    
    In response to LaMort

quick correction to my first post, I copied your 8747 when really I ment 7747. Anyway, if that really is a 95, I thought they changed the ecu coding at some point, there is a big difference from an 88 to a 95 ecu. Can you get a picture? Or better yet, if you pop open the EPROM door easy way to tell that it is a 95. In 95 they had the prom in what was called a calpak. The module contained the CAL module and the PROM in one long blue plastic cartridge. If it was one from 88 to 93~94 it should have two surface mounted chips, one smaller and one much bigger.

If you have the ecu where in the access door it has the large blue plastic module that can be removed then indeed it is a 95 ecu and no wonder it isn't running right.

98 Silverado k1500 4x4 350

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