Re: 98 Silverado Starting Problem
OK, I found the old diagram that I worked from. Here is the permanent bypass procedure on the security wire.
Try this when truck goes into "tamper mode". It will start then immediately die. Wait five or ten minutes, and then it will start right up. Of course, confirm that your vehicle has appropriate Passlock as noted in posts above before doing this!!!
Here's a diagram showing what I did. You need to take off the lower dash panel to get at the wires.
I cut the yellow wire, then measured the cranking ohms resistance at 577. Then off to Radio Shack, where they had 560 ohm resistors +/- 5%. I bought a pack of five for 99 cents. I measured the resistors to find the best one. Closest I could get (to 577) was 554 ohms, so I soldered that one onto the yellow wire (processer end) and into the orange/black wire.
The full instructions said I needed to be within 1% to 2% on the ohms. I was more like 4% off the 577 ohms, but the truck fired right up with no problem.
That was over 8 years ago and the truck has worked perfectly ever since I soldered in the resistor. I fixed the problem for about two dollars in parts!
Let me know if this helps at all.................
Dave in RI
Hi, I'm having the sam problem and trying to do the resistor fix but having trouble with getting the correct ohms. I'm using a sperry dm-210a digital multimeter but I'm not getting close to the 577 reading that you had. With my truck running there is a symbol that looks like a speaker and I went through the different settings and this is what I have Spkr symbol 817 at 20k 6.04 on the 200k 05.9 and 2m .003 am I doing something wrong or have the wrong equipment?
Thanks