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355Cheyenne
Senior Member
Posts: 3743
Loc: Northern MN
Reg: 10-27-04
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02-19-12 09:29 PM - Post#2192729
In response to LaMort
I had an 88 I just sold. 7747 ECU is correct. It should have a separate module for that under the hood. Your truck should have this and the fact it over heated indicated that it should. Step one is to look on the passenger side of the motor. Forward of the starter at the base of the block just by the motor mount is where the knock sensor belongs. In the old days this was a block drain so either the sensor is there but not plugged in or a drain plug is going to be there. Let us know what you find. Also locate the sensor wire which comes off the same harness your starter wires come from. Travel down the bell housing...
Next is the ESC module. It is on the passenger side between valve cover and intake some what midway. If it is not there then there should be a wire harness connection. Lets get factory working again and not play with questionable aftermarket quick fixes.
| 98 Silverado k1500 4x4 350 |
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