Odd electrical issue with '10 PPV

[CrashTestDummy]

We were out running errands in the Tahoe last Friday, and I noticed that the check engine light was on. We stopped by the local parts house for a scan, and it disclosed a P0455 and P0449, the typical canister-related codes we're all so familiar with.

I was working on figuring out where I'd get the parts, but we were getting ready for a 24 Hours of Lemons race last weekend, so I figured we'd deal with it the following Monday.

Well, Monday rolled around and we had some errands to run. We were taking the pups to the Vet when I noticed that the check engine light was still on, but so were the airbag light and the fasten seatbelt light. These two lights are located on the speedometer. While driving to the Vet, I noticed that the speedometer was not working either. We're thinking WTF?!?

After our Vet visit, when I started the truck, the check engine light turned off. All of the other lights that were showing errors, also went out, and the speedometer was working the entire trip home. I'll note that Friday and Monday were clear and cold, but we had cold wet days over the weekend (making for an interesting Lemons race).

Any thoughts? There's not much I can do if the warning lights are out, and everything appears to work. Thanks.

 

[CrashTestDummy]

Well, so far, the lights have been out, and everything functions as expected. Weird.

 

[sbubbaklein]

sounds like it fixed itself. You may want to go around and tighten all of the ground wires including the engine ground strap. Clean and tighten battery terminals.

 

[Goodinblack]

Check all the grounds.

 

[livingez_123]

24hrs of Lemons is a blast, I did one a few years ago in CA with a few friends.

 

[CrashTestDummy]

Yes, it is! This is our 4th event. We drove a Montana Van. It's the 3rd event for this van, and it has _never_ finished an event!!

This time it ran the longest, lasting up to the last hour of the race. Then the transmission quit. The thing was a real hotrod until then, though.

The grounds are all clean and tight, so I'm at a loss on what the issue could be. Being an ex-police vehicle, I suspect there may be some of the old police harness that may be making contact somewhere. I'll have to double-check the old console harness.

 

[HERD546]

I am looking at replacing the Battery in my Tahoe, Most of the web look ups show a 730 CCA battery. I am looking at putting something a little bigger. I have always got the biggest battery that will fit on the tray. I like to use Interstate Batteries.