Hi evryone, newbie here. I have an interesting problem with my 99 suburban 2500, stock except for snow plow. Here is the issue.... 2 week back coming home from work my instrument panel went complealy dead, the truck still ran but the transmission was shifting at higher rpm and very hard. I pulled over to check fuses and whatever I could check on the side of the road. I shut off the truck to do this and when I was done even though the truck had no power to to gauges, the glow plug lites did not work either, the truck started right up. I drove home and went under the hood and checked the fuses there and I notices when I pulled out and replaced the fuse ECM I herd a "click" and everything worked again. The same problem has happened a few times in the past 2 weeks and when ever I removed the ECM fuse the problem was solved, until yesterday. When this same problem happened removing and replacing the fuse did not fix the problem, and now the truck will not start. It will crank over and feel like it wants to start but as soon as I let off the ignition it dies. Now I have check every ground that I could find. I did notice the other day while the truck was running my alternator "growling" alittle, don't know if this could be an issue. Any info will be greatly appreciated,

Jim

Sounds to me like a failing ignition switch or a short in the wiring behind the cluster.

See"' NO LINK error thread on this page . Looks like some similarities . Something(short) seems to be blowing ecm fuse .
Guys will want you to fill out your signature & Diagnostic check list.

X2 on checklist, and the growling alternator...take your belt off and see if the alternator spins freely and quietly by hand....could have a bad bearing...bad voltage will cause all sorts of ECM problems

ECM fuse is not blowing. Will fill out checklist later

Oooh OK. Misread.

Check your harness were it goes thru the firewall to the ECM/PCM.....Many a chaffed wire has been found there.....

Also check your plugs connected to your ECM/PCM.....if they look skechy, clean them up.

2 Cents

Going to go through everything posted here. Could a failing alternator cause a bad ground????

No, but a bad groung could cause a altenator failure.

UPDATE: Checkes the 3 main grounds, cleaned and replaced, still no go. also cleaned battery terminals and groung on fusebox. Going to check ground on ECM. Is ther a wire diagram on ECM so I know which is ground?

Is your ECM-I fuse still blowing? If so, you have a short somewhere between the fuse and the ECM. Check the wire harness where is goes through the firewall on the passenger side. Easy to get to if you remove the inner fender well... What year vehicle is it?

PLease read my origional post. My fuse is not blowing. I will be checking the wiring coming through the firewall today. It is a 99 Burb.

when I pulled out and replaced the fuse ECM I herd a "click" and everything worked again

Check that fuse & fuse holder for ANY corrosion or a loose fit. It's also possible for the connection to a fuse holder to get loose or corroded.
{Obvious} - Disconnect both battery's negative cables before taking the fuse box apart if it comes to that....

have you removed the belt and spun the alternator yet? you need to check that bearing for noise before you continue, because if you get everything else fixed, and ignore the alternator...you're going to rip a belt apart when that alty seizes....

Alternator spins freely, The fuse under my hood is ECM-B,, Is and where is the ECM-A fuse. Also when I take out and replace the ecm-b fuse with the ignition on, there is clicking near the firewall on the passanger's side, sometimes 1 click, sometimes up to 6 clicks.

do NOT remove an ECM fuse with the ignition on, you risk frying the ECM due to voltage spikes....

My manual (97) shows an ECM-B & ECM-1 (ECM),both under hood. ECM-B hot always, & ECM -1 hot with ignition on.

The clicking when ECM-B fuse comes from GP controller. It is located near the firewall on the driver to the side of the fuel filter. It is supposed to be like that.

Checked all grounds and wires today with no issues. Turned in the ignition and herd the GM contoller clicking constantly, turned over engine and it started, rough though, then it died. Won't start again but do not here clicking anymore. Any sugestions?

My glow plug controller clicks constantly until the WTS light doesn't blink anymore. So, that is normal if that is what you are experiencing. Check this site for electrical schematics, if you think that might help.
http://search.ebscohost.com/

username : greatfalls
password : publiclibrary

go to the auto repair reference center

FINALLY FIXED!!!!!! Here is what happened. If you read my first post you will see I had no gauges, trans shifted funny and eventually the truck no longer started. After checking and cleaning countless times grounds, fuses and wires still nothing. I went out and got a new ECM from SS diesel and installed a few days ago, still nothing. Now totally frustrated I went back and re-checked all fuses. The 10 amp fuse for the gauges had no visable defects but by accident I put in a different 10 amp fuse and my gauges came to life. If I looked really hard at the fuse I took out I can see a crack in the metal but it did not do it's usual black dot when it blows. Now with my gauges on I can see the the Security light on the dash so I was able to reprogram the ECM and it started! So from what I gather the ECM had some kink of electrical issue whic may or may not have caused the dash fuse to blow and eventually the ECM went also. I still don't know if they were related of just S++T luck. Thanks to everyone for their input!