2000 Silverado VSS

Hey everyone, I have been having problems with my speedometer and odometer (2000 Silverado 4.3 automatic 4X4) both work every now and then...

I tried a a different cluster same problem.

I finally brought the truck to the Chev dealer after one hour and a half the guy still has not found the problem. He says it might be the VSS but he wants to check all of the wiring from the VSS to the cluster.

He did check the wires from the VSS to the computer under the hood they were ok, now he wants to leave the computer and check the wiring towards the cluster.

Should I just go ahead and buy a new VSS before I go back to the dealer. He did not really tell me if a VSS could be tested or not. He did test the cluster with the GM computer thing and it seems ok.

He did alot of other test also.

He had the wheels lifted, the truck in gear and the computer was able to read the speed does that mean the VSS is good, the guy was unable to tell me.

I should mention that this truck has been restored it was flooded.

I am just worried that once the dealer found out this was a rebuilt truck they wanted to play around and say it is a wiring problem. The truck ran at least 6 months before this problem

Thanks a million

nevlis

Reply to
nevlis
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Checking wires sounds like the right troible shooting to me. Intermitant problems can be hard to trace.

Knowing it is a flood vehical makes a differance. It tells the tech what sort of things he should look for. Flood vehicals are prone to electirac problems from gounding points rusting. There can also be damaged wires that only short out under cirtaint condishions.

I would go back, let them check the rest of the wires. They have the proper tools, and the proper books. Ask them how they test the VSS. Charles

Reply to
Charles Bendig

"Charles Bendig" wrote in news:vWuoc.946$ snipped-for-privacy@fe2.columbus.rr.com:

Thanks for the reply... However, before I back I think I will stick in a used VSS that my friend has and try that.

Thanks

Reply to
silven

If the computer can see the vss signal but the cluster cannot, then the vss is not the problem. They sound like they're doing a fine diagnostic job. I am curious, however, if the vss sends the signal to the pcm, which in turn sends it to the cluster, why it was necessary to check the vss or wiring to the PCM, since all those items seem to be verifiably ok due to the PCM seeing the vss signal. Then again, I can't remember how this circuit is laid out, either.

Reply to
hyundaitech

Look closely at the VSS you take off. Do the connections look oxidized or corroded? If so, it may have been a connection problem due to corrosion at the VSS connector from the flood damage.

Bob

Reply to
Bob Urz

Bob Urz wrote in news:40a2d0f1 snipped-for-privacy@corp.newsgroups.com:

Reply to
silven

silven wrote in news:Xns94E85578696Fsilvencanadacom@206.167.113.5:

Reply to
silven

The tech 2 communicates directly with the cluster, so it can operate the speedometer that way. His test showed that the data bus and that the cluster were working correctly at the time of the test.

Reply to
hyundaitech

There's probably a speed output from the PCM to the IPC (Cluster). You'd need a schematic to determine which wires these would be. Unfortunately, I no longer have access to one.

Reply to
hyundaitech

"hyundaitech" wrote in news: snipped-for-privacy@localhost.talkaboutautos.com:

Thanks for the post..

Reply to
silven

"R" wrote in news:I4Yoc.19401$ snipped-for-privacy@newsread1.news.pas.earthlink.net:

The cluster is suppose to be good since I tried another and it had the same problem and the GM tech tested it.. and he was able to control it.

Cruise does not work... but that has not been working since I bought the truck and as I mentionned earlied the speedometer did work for awhile. Maybe the cruise not working has something to do with the problem (I thought the cruise switch was finished because it looked a little worn out)..

where would I find such a diagram, GM manuels for this truck? Or is there somewhere a little cheaper. Does the Haynes book have these diagrams? Is there some web-site that might have them on line. Does someone have one that they might be able to email me.

Thanks everyone for your time and posts this is a great place for help..

Reply to
nevlis

What schematics do you want? I should be able to wrangle them up for you. From the looks of it you want cruise control, instrument cluster, and the

4.3 Tranny (for the VSS).
Reply to
Phillip Schmid

Cruise Control is directly related to speedometer funtions. You should have informed the tech the cruise was in-op. Thier may well be a wire short there.

USED factory service manuials can be had reasonibly thru eBay. Charles

Reply to
Charles Bendig

"Charles Bendig" wrote in news:aUhpc.6791$ snipped-for-privacy@fe1.columbus.rr.com:

Hey everyone thanks for all your help. I found the problem

The problem was a bad connection to the Cruise Control module under the hood.

Thanks

Reply to
nevlis

Flood reconstructions are funny:

Because what's not wrong electrically, manifests it's self magically every few weeks. The connections continue to oxidize, especially if it was a salt water flood.

If a salt water flood was the case, be prepared for the fenders to fall off in a couple of years too.

My advice, take apart the interior, and use a mile caustic cleaner to soak the electric connectors, then pressure wash them with hot water. Standard practice whenever I did a flood vehicle. (Purple power works great)

Years ago there was nothing on the market, so white vinegar was what we used in a spray bottle on all the connectors.

Refinish King

Reply to
Refinish King

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