VCM would be the last thing I consider. I'd start at ensuring you have a charged battery, good grounds, and also corrosion free battery terminals. Then check for DTCS (which will also ensure there's communication with the VCM at the DLC).
98 k1500 possible ecm/pcm
- Thread starter carsonepps8
- Start date
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markanthony123
Newbie
- Joined
- Aug 16, 2011
- Messages
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surging and the starter click can both be ground issues. the starter grounds to the negative bat cable to block. the ends can rot. the surging can be bad reference voltages from sensors due to ground straps. on vortec you should have strap from passenger head to firewall and from head to frame, and firewall to frame. they all need to be solid and clean. the tranny acting up can also be ground. on vortec there may be a ground from tranny stud to drivers side head. otherwise ground can pass through the tranny internals instead of the case.
carsonepps8
Newbie
I have a lot of work done to it brand new batteries. Rebuild tranny. Brand new starter hasn’t been spun but maybe 150 times. Rebuilt motor. New battery teriminals. Brand new ignition module. I’ll check for codes but if it’s throwing codes it’ll be for ecm/pcm codes bc everything else is fine. It drives great no problems. It’s idling fine now only done it once with the surge. The only prob now is the delayed shift.
That doesn't reset the ECM. But what do I know, only been messing with these trucks 27 years.
Doesn't matter if things are new, they can be loose. Doesn't matter if you checked things before, recheck them, they can become detached. And if you're not going to follow advice, why ask for it?
Good luck.
carsonepps8
Newbie
I said I’ll check again it never said I wouldn’t. If you can’t have common decency and not be a ****** don’t answer then. Try to be civil here everyone else has be nice enough. I’m just telling what I’ve already checked and haven’t checked. Ain’t no sense in being that rude.
Lol. Okay buddy.
You never said you'd check, you said your battery terminals were new.
As I said, good luck.
You never said you'd check, you said your battery terminals were new.
As I said, good luck.
carsonepps8
Newbie
So I scanned my truck and found several codes
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So now you need to figure out why the MIL didn't illuminate.
carsonepps8
Newbie
I think the bulb might be blown I’ll check it. If not what do you think could be the cause.
That could be it.
